Daniel H. Janzen, Ph. D. - Publications

Affiliations: 
Biology University of Pennsylvania, Philadelphia, PA, United States 
Website:
http://janzen.sas.upenn.edu/

235 high-probability publications. We are testing a new system for linking publications to authors. You can help! If you notice any inaccuracies, please sign in and mark papers as correct or incorrect matches. If you identify any major omissions or other inaccuracies in the publication list, please let us know.

Year Citation  Score
2023 Edwards AW, Harrison XA, Smith MA, Chavarría Díaz MM, Sasa M, Janzen DH, Hallwachs W, Chaves G, Fernández R, Palmer C, Wilson C, North A, Puschendorf R. Amphibian diversity across three adjacent ecosystems in Área de Conservación Guanacaste, Costa Rica. Peerj. 11: e16185. PMID 38034867 DOI: 10.7717/peerj.16185  0.387
2023 Rosa CA, Lachance MA, Limtong S, Santos ARO, Landell MF, Gombert AK, Morais PB, Sampaio JP, Gonçalves C, Gonçalves P, Góes-Neto A, Santa-Brígida R, Martins MB, Janzen DH, Hallwachs W. Yeasts from tropical forests: Biodiversity, ecological interactions, and as sources of bioinnovation. Yeast (Chichester, England). PMID 37921426 DOI: 10.1002/yea.3903  0.301
2023 Fernandez-Triana JL, Shimbori EM, Whitfield JB, Penteado-Dias AM, Shaw SR, Boudreault C, Sones J, Perez K, Brown A, Manjunath R, Burns JM, Hebert PDN, Smith MA, Hallwachs W, Janzen DH. A revision of the parasitoid wasp genus Mason with the description of 30 new species (Hymenoptera, Braconidae). Zookeys. 1175: 5-162. PMID 37636532 DOI: 10.3897/zookeys.1175.105068  0.618
2023 Orlandin E, Laurent RAS, Piovesan M, Hallwachs W, Chacón I, Janzen D, Carneiro E. Anurocampa (Lepidoptera: Notodontidae): two new species, systematics and immature stages. Zootaxa. 5306: 401-426. PMID 37518512 DOI: 10.11646/zootaxa.5306.4.1  0.308
2023 Kawahara AY, Storer C, Carvalho APS, Plotkin DM, Condamine FL, Braga MP, Ellis EA, St Laurent RA, Li X, Barve V, Cai L, Earl C, Frandsen PB, Owens HL, Valencia-Montoya WA, ... ... Janzen DH, et al. A global phylogeny of butterflies reveals their evolutionary history, ancestral hosts and biogeographic origins. Nature Ecology & Evolution. PMID 37188966 DOI: 10.1038/s41559-023-02041-9  0.302
2022 Sääksjärvi IE, Kaunisto KM, Sharkey M, Stedenfeld S, Smith MA, Hallwachs W, Janzen D. Cryptic biodiversity of tropical hesperiid caterpillar-attacking parasitoid wasps: three new species of Townes (Hymenoptera, Ichneumonidae, Cremastinae) from Costa Rica and Perú. Biodiversity Data Journal. 10: e91486. PMID 36761541 DOI: 10.3897/BDJ.10.e91486  0.42
2022 Nakahara S, Janzen DH, Hallwachs W, Huertas B, Das GN, Willmott KR. Revision of the "celia clade" of Pseudodebis Forster, 1964, with Two New Species and Notes on Papilio phorcys Fabricius, 1793 (Lepidoptera: Nymphalidae: Satyrinae). Neotropical Entomology. PMID 35674865 DOI: 10.1007/s13744-022-00954-x  0.362
2021 Sharkey MJ, Baker A, McCluskey K, Smith A, Naik S, Ratnasingham S, Manjunath R, Perez K, Sones J, D'Souza M, Jacques BS, Hebert P, Hallwachs W, Janzen D. ?Addendum to a minimalist revision of Costa Rican Braconidae: 28 new species and 23 host records. Zookeys. 1075: 77-136. PMID 35046752 DOI: 10.3897/zookeys.1075.72197  0.366
2021 Hansson C, Hallwachs W, Janzen DH. New distributional, biological and taxonomic information on the genus Eulophinusia Girault (Hymenoptera: Eulophidae). Zootaxa. 5047: 370-376. PMID 34810841 DOI: 10.11646/zootaxa.5047.3.8  0.363
2021 Sharkey MJ, Janzen DH, Hallwachs W, Chapman EG, Smith MA, Dapkey T, Brown A, Ratnasingham S, Naik S, Manjunath R, Perez K, Milton M, Hebert P, Shaw SR, Kittel RN, et al. Minimalist revision and description of 403 new species in 11 subfamilies of Costa Rican braconid parasitoid wasps, including host records for 219 species. Zookeys. 1013: 1-665. PMID 34512087 DOI: 10.3897/zookeys.1013.55600  0.343
2021 Fleming AJ, Wood DM, Smith MA, Hallwachs W, Janzen D. Revison of Coquillett (Diptera: Tachinidae) with description of five new species from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal. 9: e68598. PMID 34393585 DOI: 10.3897/BDJ.9.e68598  0.399
2020 Metz MA, Hallwachs W, Janzen DH. Four new gelechioid species to honor Costa Rica's conservation of wild biodiversity (Lepidoptera). Zootaxa. 4810: zootaxa.4810.1.2. PMID 33055909 DOI: 10.11646/Zootaxa.4810.1.2  0.485
2020 Quicke DLJ, Sharkey MJ, Janzen D, Hallwachs W, Hebert PDN, Butcher BA. A new genus and species of Neotropical gregarious braconine parasitoid (Hymenoptera: Braconidae) of a caterpillar (Lepidoptera: Hesperiidae). Zootaxa. 4816: zootaxa.4816.3.7. PMID 33055695 DOI: 10.11646/Zootaxa.4816.3.7  0.465
2020 Janzen D, Hallwachs W, Pereira G, Blanco R, Masis A, Chavarria MM, Chavarria F, Guadamuz A, Araya M, Smith MA, Valerio J, Guido H, Sanchez E, Bermudez S, Perez KH, et al. Using DNA-barcoded Malaise trap samples to measure impact of a geothermal energy project on the biodiversity of a Costa Rican old-growth rain forest. Genome. PMID 32579871 DOI: 10.1139/Gen-2020-0002  0.378
2020 Parks KS, Janzen DH, Hallwachs W, Fernández-Triana J, Dyer LA, Rodriguez JJ, Arias-Penna DC, Whitfield JB. A five-gene molecular phylogeny reveals Parapanteles Ashmead (Hymenoptera: Braconidae) to be polyphyletic as currently composed. Molecular Phylogenetics and Evolution. 106859. PMID 32497831 DOI: 10.1016/J.Ympev.2020.106859  0.621
2020 Fleming AJ, Wood DM, Smith MA, Dapkey T, Hallwachs W, Janzen D. Revision of van der Wulp (Diptera: Tachinidae) and twenty-five new species from Area de Conservación Guanacaste in northwestern Costa Rica with a key to Mesoamerican species. Biodiversity Data Journal. 8: e47157. PMID 32390755 DOI: 10.3897/Bdj.8.E47157  0.498
2020 Fleming AJ, Wood DM, Smith MA, Dapkey T, Hallwachs W, Janzen D. A new genus and new species in the tribe Uramyini (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal. 8: e48907. PMID 32148433 DOI: 10.3897/Bdj.8.E48907  0.466
2020 Solis MA, Phillips-Rodríguez E, Hallwachs W, Dapkey T, Janzen DH. Asturodes Amsel (Lepidoptera: Crambidae: Spilomelinae): Three New Species from the Western Hemisphere and Food Plant Records from Area de ConservaciÓn Guanacaste, Costa Rica Proceedings of the Entomological Society of Washington. 122: 147. DOI: 10.4289/0013-8797.122.1.147  0.306
2020 Dabek EZ, Whitfield JB, Hallwachs W, Janzen DH. Two new reared species of Heteropteron Brullé (Hymenoptera, Braconidae, Cardiochilinae) from northwest Costa Rica, with the first definitive host records for the genus Journal of Hymenoptera Research. 77: 151-165. DOI: 10.3897/Jhr.77.50577  0.633
2020 Janzen DH, Hallwachs W. Área de Conservación Guanacaste, northwestern Costa Rica: Converting a tropical national park to conservation via biodevelopment Biotropica. DOI: 10.1111/Btp.12755  0.31
2020 Smith MA, Hallwachs W, Janzen DH, Longino JT, Branstetter MG. A subterranean ant Acanthostichus Mayr, 1887 is revealed in Costa Rica Insectes Sociaux. 67: 1-4. DOI: 10.1007/S00040-020-00754-9  0.329
2019 Arias-Penna DC, Whitfield JB, Janzen DH, Winifred Hallwachs, Dyer LA, Smith MA, Hebert PDN, Fernández-Triana JL. A species-level taxonomic review and host associations of (Hymenoptera, Braconidae, Microgastrinae) with an emphasis on 136 new reared species from Costa Rica and Ecuador. Zookeys. 890: 1-685. PMID 31798309 DOI: 10.3897/Zookeys.890.35786  0.666
2019 Goldstein PZ, Janzen DH, Hallwachs W. : a new genus and life history for the pteridivore Druce, 1898 (Lepidoptera, Noctuidae). Zookeys. 866: 127-145. PMID 31388326 DOI: 10.3897/Zookeys.866.27647  0.439
2019 Fleming AJ, Wood DM, Smith MA, Dapkey T, Hallwachs W, Janzen D. Twenty-two new species in the genus Townsend (Diptera: Tachinidae) from Area de Conservación Guanacaste, with a key to the species of Mesoamerica. Biodiversity Data Journal. 7: e29553. PMID 31308823 DOI: 10.3897/Bdj.7.E29553  0.5
2019 Fleming AJ, Wood DM, Smith MA, Dapkey T, Hallwachs W, Janzen DH. A new species of Reinhard (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal. 7: e29130. PMID 31048976 DOI: 10.3897/Bdj.7.E29130  0.433
2019 Fernandez-Triana J, Boudreault C, Dapkey T, Alex Smith M, Hallwachs W, Janzen D. A revision of (Hymenoptera, Braconidae, Microgastrinae) with the second mediotergite broadly rectangular from Area de Conservación Guanacaste, Costa Rica. Zookeys. 835: 87-123. PMID 31043850 DOI: 10.3897/Zookeys.835.33440  0.491
2019 Li W, Cong Q, Shen J, Zhang J, Hallwachs W, Janzen DH, Grishin NV. Genomes of skipper butterflies reveal extensive convergence of wing patterns. Proceedings of the National Academy of Sciences of the United States of America. PMID 30877254 DOI: 10.1073/Pnas.1821304116  0.309
2019 Sharkey MJ, Penteado-Dias AM, Smith MA, Hallwachs W, Janzen D. Synopsis of New World Sigalphinae (Hymenoptera, Braconidae) with the description of two new species and a key to genera Journal of Hymenoptera Research. 68: 1-11. DOI: 10.3897/Jhr.68.30131  0.411
2019 Meierotto S, Sharkey MJ, Janzen DH, Hallwachs W, Hebert PDN, Chapman EG, Smith MA. A revolutionary protocol to describe understudied hyperdiverse taxa and overcome the taxonomic impediment Deutsche Entomologische Zeitschrift. 66: 119-145. DOI: 10.3897/Dez.66.34683  0.486
2019 Núñez R, Genaro JA, Pérez‐Asso A, Murillo‐Ramos L, Janzen DH, Hallwachs W, Wahlberg N, Hausmann A. Species delimitation and evolutionary relationships among Phoebis New World sulphur butterflies (Lepidoptera, Pieridae, Coliadinae) Systematic Entomology. 45: 481-492. DOI: 10.1111/Syen.12408  0.484
2019 Puschendorf R, Wallace M, Chavarría MM, Crawford AJ, Wynne F, Knight M, Janzen DH, Hallwachs W, Palmer C, Price SJ. Cryptic diversity and ranavirus infection of a critically endangered Neotropical frog before and after population collapse Animal Conservation. 22: 515-524. DOI: 10.1111/Acv.12498  0.389
2019 Janzen DH, Hallwachs W. Perspective: Where might be many tropical insects? Biological Conservation. 233: 102-108. DOI: 10.1016/J.Biocon.2019.02.030  0.409
2018 Goldstein PZ, Janzen DH, Proshek B, Dapkey T, Hallwachs W. Review of Schaus, 1911 (Lepidoptera, Noctuidae): a new combination and re-descriptions of species newly associated with ferns (Polypodiaceae). Zookeys. 135-165. PMID 30337827 DOI: 10.3897/Zookeys.788.21235  0.437
2018 Goldstein PZ, Janzen DH, Proshek B, Dapkey T, Hallwachs W. A review of Druce, 1908: a newly discovered case of fern-feeding and descriptions of three new species (Lepidoptera, Noctuidae). Zookeys. 87-133. PMID 30337826 DOI: 10.3897/Zookeys.788.21222  0.467
2018 Fleming AJ, Wood DM, Smith MA, Hallwachs W, Janzen DH. Revision of the Mesoamerican species of Townsend (Diptera: Tachinidae) and description of twenty-three new species reared from caterpillars in Area de Conservación Guanacaste, northwestern Costa Rica. Biodiversity Data Journal. e11223. PMID 29674932 DOI: 10.3897/Bdj.6.E11223  0.503
2017 Fleming AJ, Wood DM, Smith MA, Dapkey T, Hallwachs W, Janzen D. A new species of Voria Robineau-Desvoidy (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal. e20123. PMID 29391853 DOI: 10.3897/Bdj.5.E20123  0.483
2017 Hammer TJ, Janzen DH, Hallwachs W, Jaffe SP, Fierer N. Caterpillars lack a resident gut microbiome. Proceedings of the National Academy of Sciences of the United States of America. PMID 28830993 DOI: 10.1073/Pnas.1707186114  0.391
2017 Fleming AJ, Wood DM, Smith MA, Dapkey T, Hallwachs W, Janzen DH. Five new species of Vibrissina Rondani (Diptera: Tachinidae) from Area de Conservación Guanacaste in Northwestern Costa Rica. Biodiversity Data Journal. e10967. PMID 28781564 DOI: 10.3897/Bdj.5.E10967  0.492
2017 Janzen DH, Burns JM, Cong Q, Hallwachs W, Dapkey T, Manjunath R, Hajibabaei M, Hebert PDN, Grishin NV. Nuclear genomes distinguish cryptic species suggested by their DNA barcodes and ecology. Proceedings of the National Academy of Sciences of the United States of America. PMID 28716927 DOI: 10.1073/Pnas.1621504114  0.482
2017 Fleming AJ, Wood DM, Smith MA, Hallwachs W, Janzen D, Dapkey T. Nine new species of Uramya Robineau-Desvoidy (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica, with a key to their identification. Biodiversity Data Journal. e9649. PMID 28325972 DOI: 10.3897/Bdj.5.E9649  0.502
2017 Metz MA, Janzen DH, Hallwachs W. Descriptions of Four New Species of Struthoscelis Meyrick (Lepidoptera: Oecophoridae: Oecophorinae), One from Area De Conservación Guanacaste, Northwestern Costa Rica, Providing the First Known Biology for the Genus, and Discovery of a Novel Wing Morphology in Males Proceedings of the Entomological Society of Washington. 119: 442-458. DOI: 10.4289/0013-8797.119.3.442  0.356
2017 Heikkilä M, Metz MA, Hallwachs W, Janzen DH. Three New Species of Rectiostoma Becker, 1982 (Lepidoptera: Gelechioidea: Depressariidae) from Area De Conservación Guanacaste, Northwestern Costa Rica Proceedings of the Entomological Society of Washington. 119: 47-62. DOI: 10.4289/0013-8797.119.1.47  0.372
2017 Treuer TLH, Choi JJ, Janzen DH, Hallwachs W, Peréz-Aviles D, Dobson AP, Powers JS, Shanks LC, Werden LK, Wilcove DS. Low-cost agricultural waste accelerates tropical forest regeneration Restoration Ecology. 26: 275-283. DOI: 10.1111/Rec.12565  0.362
2017 Bächtold A, Kaminski LA, Magaldi LM, Oliveira PS, Del-Claro K, Janzen DH, Burns JM, Grishin N, Hajibabaei M, Hallwachs W, Freitas AV. Integrative data helps the assessment of a butterfly within the Udranomia kikkawai species complex (Lepidoptera: Hesperiidae): Immature stages, natural history, and molecular evidence Zoologischer Anzeiger. 266: 169-176. DOI: 10.1016/J.Jcz.2016.11.009  0.428
2016 Janzen DH, Hallwachs W. DNA barcoding the Lepidoptera inventory of a large complex tropical conserved wildland, Area de Conservacion Guanacaste, northwestern Costa Rica. Genome / National Research Council Canada = Genome / Conseil National De Recherches Canada. 1-20. PMID 27584861 DOI: 10.1139/Gen-2016-0005  0.476
2016 Miller SE, Hausmann A, Hallwachs W, Janzen DH. Advancing taxonomy and bioinventories with DNA barcodes. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences. 371. PMID 27481791 DOI: 10.1098/Rstb.2015.0339  0.415
2016 Fleming AJ, Wood DM, Smith MA, Janzen DH, Hallwachs W, Dapkey T. A new species of Phosocephala Townsend, 1908 (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal. e7863. PMID 27226748 DOI: 10.3897/Bdj.4.E7863  0.49
2016 Fleming AJ, Wood DM, Smith MA, Hallwachs W, Janzen D, Dapkey T. Two new species of Erythromelana Townsend, 1919 (Diptera: Tachinidae) from Area de Conservación Guanacaste in northwestern Costa Rica. Biodiversity Data Journal. e7386. PMID 27226745 DOI: 10.3897/Bdj.4.E7386  0.498
2016 Fernández-Triana J, Boudreault C, Dapkey T, Smith MA, Rodriguez J, Hallwachs W, Janzen DH. Revision of the genus Promicrogaster (Hymenoptera, Braconidae, Microgastrinae) from Area de Conservación Guanacaste, Costa Rica, with a key to all species previously described from Mesoamerica Journal of Hymenoptera Research. 50: 25-79. DOI: 10.3897/Jhr.50.8220  0.513
2016 Fernandez-Triana JL, Whitfield JB, Smith MA, Dapkey T, Hallwachs W, Janzen DH. Review of the world species of Exoryza (Hymenoptera, Braconidae, Microgastrinae), with description of five new species Deutsche Entomologische Zeitschrift. 63: 195-210. DOI: 10.3897/Dez.63.8977  0.641
2016 Janzen DH. Sweep samples of tropical deciduous forest foliage-inhabiting insects: seasonal changes and inter-field differences in adult bugs and beetles Revista De Biologia Tropical. 24: 149-161. DOI: 10.15517/Rbt.V24I1.25976  0.432
2015 Fleming AJ, Wood DM, Smith MA, Janzen DH, Hallwachs W. Nine new species of Itaplectops (Diptera: Tachinidae) reared from caterpillars in Area de Conservación Guanacaste, northwestern Costa Rica, with a key to Itaplectops species. Biodiversity Data Journal. e4596. PMID 26752964 DOI: 10.3897/Bdj.3.E4596  0.498
2015 Sharkey MJ, Chapman EG, Janzen DH, Hallwachs W, Smith MA. Revision of Aphelagathis (Hymenoptera, Braconidae, Agathidinae, Agathidini). Zootaxa. 4000: 73-89. PMID 26623602 DOI: 10.11646/Zootaxa.4000.1.3  0.47
2015 Fleming AJ, Wood DM, Smith MA, Hallwachs W, Janzen D. Three new species of Ametadoria Townsend (Diptera: Tachinidae) from Area de Conservación Guanacaste, Costa Rica. Biodiversity Data Journal. e5039. PMID 26379458 DOI: 10.3897/Bdj.3.E5039  0.452
2015 Fleming AJ, Wood DM, Janzen DH, Hallwachs W, Smith MA. Three new species of Trigonospila Pokorny (Diptera: Tachinidae), from Area de Conservación Guanacaste, northwestern Costa Rica, with a key for their identification. Biodiversity Data Journal. e4595. PMID 26379456 DOI: 10.3897/Bdj.3.E4595  0.496
2015 Fleming AJ, Wood DM, Janzen D, Hallwachs W, Smith MA. Seven new species of Spathidexia Townsend (Diptera: Tachinidae) reared from caterpillars in Area de Conservación Guanacaste, Costa Rica. Biodiversity Data Journal. e4597. PMID 25859130 DOI: 10.3897/Bdj.3.E4597  0.384
2015 Hansson C, Smith MA, Janzen DH, Hallwachs W. Integrative taxonomy of New World Euplectrus Westwood (Hymenoptera, Eulophidae), with focus on 55 new species from Area de Conservación Guanacaste, northwestern Costa Rica. Zookeys. 1-236. PMID 25829847 DOI: 10.3897/Zookeys.485.9124  0.46
2015 Fernandez-Triana JL, Whitfield JB, Smith MA, Hallwachs W, Janzen DH. Revision of the Neotropical genus Sendaphne nixon (Hymenoptera, Braconidae, Microgastrinae) Journal of Hymenoptera Research. 41: 1-29. DOI: 10.3897/Jhr.41.8586  0.61
2015 Fernandez-Triana JL, Whitfield JB, Smith MA, Kula RR, Hallwachs W, Janzen DH. Revision of the genera microplitis and snellenius (hymenoptera, braconidae, microgastrinae) from area de conservacion guanacaste, Costa Rica, with a key to all species previously described from Mesoamerica Mitteilungen Aus Dem Museum Fur Naturkunde in Berlin - Deutsche Entomologische Zeitschrift. 62: 137-201. DOI: 10.3897/Dez.62.5276  0.637
2015 Ponce FV, Breinholt JW, Hossie T, Barber JR, Janzen DH, Hallwachs W, Kawahara AY. A molecular phylogeny of Eumorpha (Lepidoptera: Sphingidae) and the evolution of anti-predator larval eyespots Systematic Entomology. 40: 401-408. DOI: 10.1111/Syen.12111  0.417
2015 Pook VG, Chapman EG, Janzen DH, Hallwachs W, Smith MA, Sharkey MJ. Polydnavirus gene provides accurate identification of species in the genus Hyposoter (Hymenoptera: Ichneumonidae) Insect Conservation and Diversity. DOI: 10.1111/Icad.12118  0.395
2014 Phillips-Rodríguez E, Powell JA, Hallwachs W, Janzen DH. A synopsis of the genus Ethmia Hübner in Costa Rica: biology, distribution, and description of 22 new species (Lepidoptera, Gelechioidea, Depressariidae, Ethmiinae), with emphasis on the 42 species known from Área de Conservación Guanacaste. Zookeys. 1-86. PMID 25561859 DOI: 10.3897/Zookeys.461.8377  0.489
2014 Fleming A, Wood DM, Smith MA, Janzen D, Hallwachs W. A new species of Cordyligaster Macquart, reared from caterpillars in Area de Conservacion Guanacaste, northwestern Costa Rica. Biodiversity Data Journal. e4174. PMID 25535485 DOI: 10.3897/Bdj.2.E4174  0.48
2014 Fernandez-Triana JL, Whitfield JB, Smith MA, Hallwachs W, Janzen DH. First record of the genus Venanus (Hymenoptera: Braconidae: Microgastrinae) in Mesoamerica, with the description of two new species from Costa Rica. Biodiversity Data Journal. e4167. PMID 25425941 DOI: 10.3897/Bdj.2.E4167  0.649
2014 Fernández-Triana JL, Janzen DH, Hallwachs W, Whitfield JB, Smith MA, Kula R. Revision of the genus Pseudapanteles (Hymenoptera, Braconidae, Microgastrinae), with emphasis on the species in Area de Conservación Guanacaste, northwestern Costa Rica. Zookeys. 1-82. PMID 25349512 DOI: 10.3897/Zookeys.446.8195  0.664
2014 Chacón IA, Janzen DH, Hallwachs W. Four new species of Symmerista Hübner, 1816 (Notodontidae, Nystaleinae) from Costa Rica. Zookeys. 39-63. PMID 25061379 DOI: 10.3897/Zookeys.421.6342  0.485
2014 Bertrand C, Janzen DH, Hallwachs W, Burns JM, Gibson JF, Shokralla S, Hajibabaei M. Mitochondrial and nuclear phylogenetic analysis with Sanger and next-generation sequencing shows that, in Área de Conservación Guanacaste, northwestern Costa Rica, the skipper butterfly named Urbanus belli (family Hesperiidae) comprises three morphologically cryptic species. Bmc Evolutionary Biology. 14: 153. PMID 25005355 DOI: 10.1186/1471-2148-14-153  0.449
2014 Gibson J, Shokralla S, Porter TM, King I, van Konynenburg S, Janzen DH, Hallwachs W, Hajibabaei M. Simultaneous assessment of the macrobiome and microbiome in a bulk sample of tropical arthropods through DNA metasystematics. Proceedings of the National Academy of Sciences of the United States of America. 111: 8007-12. PMID 24808136 DOI: 10.1073/Pnas.1406468111  0.367
2014 Fernández-Triana JL, Whitfield JB, Rodriguez JJ, Smith MA, Janzen DH, Hallwachs WD, Hajibabaei M, Burns JM, Solis MA, Brown J, Cardinal S, Goulet H, Hebert PD. Review of Apanteles sensu stricto (Hymenoptera, Braconidae, Microgastrinae) from Area de Conservación Guanacaste, northwestern Costa Rica, with keys to all described species from Mesoamerica. Zookeys. 1-565. PMID 24624021 DOI: 10.3897/Zookeys.383.6418  0.661
2014 Fernandez-Triana JL, Whitfield JB, Smith MA, Braet Y, Hallwachs W, Janzen DH. Review of the neotropical genus Prasmodon (Hymenoptera, Braconidae, Microgastrinae), with emphasis on species from Area de Conservación Guanacaste, northwestern Costa Rica Journal of Hymenoptera Research. 37: 1-52. DOI: 10.3897/Jhr.37.6748  0.622
2014 Brown JW, Janzen DH, Hallwachs W, Zahiri R, Hajibabaei M, Hebert PDN. Cracking complex taxonomy of Costa Rican moths: Anacrusis zeller (Lepidoptera: Tortricidae: Tortricinae) Journal of the Lepidopterists' Society. 68: 248-263. DOI: 10.18473/Lepi.V68I4.A3  0.452
2014 Grishin NV, Burns JM, Brockmann E, Hallwachs W, Janzen DH. A cryptic new Jemadia (Hesperiidae: Pyrginae: Pyrrhopygini) from Costa Rica and Panama with a subtly distinctive combination of blue rays and white bands Journal of the Lepidopterists' Society. 68: 232-247. DOI: 10.18473/Lepi.V68I4.A2  0.444
2014 Grishin NV, Janzen DH, Hallwachs W. A new species of eracon (hesperiidae: Pyrginae) substantiated by a number of traits, including female genitalia Journal of the Lepidopterists' Society. 68: 149-161. DOI: 10.18473/Lepi.V68I3.A1  0.424
2014 Nielsen V, Hurtado P, Janzen DH, Tamayo G, Sittenfeld A. Recolecta de artrópodos para prospección de la biodiversidad en el Área de Conservación Guanacaste, Costa Rica Revista De Biología Tropical. 52: 119. DOI: 10.15517/Rbt.V52I1.14760  0.379
2014 Fleming AJ, Wood DM, Smith MA, Hallwachs W, Janzen DH. Revision of the new world species of Houghia coquillett (Diptera, Tachinidae) reared from caterpillars in Area de Conservación Guanacaste, Costa Rica Zootaxa. 3858: 1-90. DOI: 10.11646/zootaxa.3858.1.1  0.373
2014 Smith MA, Hallwachs W, Janzen DH. Diversity and phylogenetic community structure of ants along a Costa Rican elevational gradient Ecography. 37: 720-731. DOI: 10.1111/J.1600-0587.2013.00631.X  0.385
2013 Brown JW, Janzen DH, Hallwachs W. A food plant specialist in Sparganothini: A new genus and species from Costa Rica (Lepidoptera, Tortricidae). Zookeys. 53-63. PMID 23794903 DOI: 10.3897/Zookeys.303.5230  0.473
2013 Arias-Penna DC, Whitfield JB, Janzen DH, Hallwachs W. Three new species in the genus Wilkinsonellus (Braconidae, Microgastrinae) from the Neotropics, and the first host record for the genus. Zookeys. 79-95. PMID 23794899 DOI: 10.3897/Zookeys.302.4962  0.636
2013 Espinoza BA, Janzen DH, Winnie Hallwachs, J Bolling Sullivan. Description of a new species and subspecies of Idalus Walker from Costa Rica, Honduras and Guatemala (Lepidoptera, Erebidae, Arctiinae, Arctiini). Zookeys. 71-84. PMID 23730178 DOI: 10.3897/Zookeys.264.4403  0.405
2013 Chacón IA, Janzen DH, Hallwachs W, J Bolling Sullivan, Hajibabaei M. Cryptic species within cryptic moths: new species of Dunama Schaus (Notodontidae, Nystaleinae) in Costa Rica. Zookeys. 11-45. PMID 23730176 DOI: 10.3897/Zookeys.264.4440  0.476
2013 Alex Smith M, Fernández-Triana JL, Eveleigh E, Gómez J, Guclu C, Hallwachs W, Hebert PD, Hrcek J, Huber JT, Janzen D, Mason PG, Miller S, Quicke DL, Rodriguez JJ, Rougerie R, et al. DNA barcoding and the taxonomy of Microgastrinae wasps (Hymenoptera, Braconidae): impacts after 8 years and nearly 20 000 sequences. Molecular Ecology Resources. 13: 168-76. PMID 23228011 DOI: 10.1111/1755-0998.12038  0.637
2013 Burns JM, Janzen DH, Hallwachs W, Hajibabaei M. DNA barcodes reveal yet another new species of Venada (Lepidoptera: Hesperiidae) in Northwestern Costa Rica Proceedings of the Entomological Society of Washington. 115: 37-47. DOI: 10.4289/0013-8797.115.1.37  0.32
2013 Grishin NV, Janzen DH, Hallwachs W. Hiding behind gaudy looks, a new central American species of Phareas (Hesperiidae: Eudaminae) Journal of the Lepidopterists' Society. 67: 161-174. DOI: 10.18473/Lepi.V67I3.A3  0.426
2013 Grishin NV, Burns JM, Janzen DH, Hallwachs W, Hajibabaei M. Oxynetra: Facies and dna barcodes point to a new species from costa rica (Hesperiidae: Pyrginae: Pyrrhopygini) Journal of the Lepidopterists' Society. 67: 1-14. DOI: 10.18473/Lepi.V67I1.A1  0.49
2013 Smith MA, Hallwachs W, Janzen DH, Segura RB. Dna barcoding a collection of ants (Hymenoptera: Formicidae) from Isla Del Coco, Costa Rica Florida Entomologist. 96: 1500-1507. DOI: 10.1653/024.096.0431  0.47
2013 Rodriguez JJ, Fernández-Triana JL, Smith MA, Janzen DH, Hallwachs W, Erwin TL, Whitfield JB. Extrapolations from field studies and known faunas converge on dramatically increased estimates of global microgastrine parasitoid wasp species richness (Hymenoptera: Braconidae) Insect Conservation and Diversity. 6: 530-536. DOI: 10.1111/Icad.12003  0.616
2012 Whitfield JB, Fernández-Triana JL, Janzen DH, Hallwachs W, Smith MA, Cardinal S. Mariapanteles (Hymenoptera, Braconidae), a new genus of Neotropical microgastrine parasitoid wasp discovered through biodiversity inventory. Zookeys. 61-80. PMID 22859873 DOI: 10.3897/Zookeys.208.3326  0.624
2012 Laurance WF, Useche DC, Rendeiro J, Kalka M, Bradshaw CJ, Sloan SP, Laurance SG, Campbell M, Abernethy K, Alvarez P, Arroyo-Rodriguez V, Ashton P, Benítez-Malvido J, Blom A, Bobo KS, ... ... Janzen D, et al. Averting biodiversity collapse in tropical forest protected areas. Nature. 489: 290-4. PMID 22832582 DOI: 10.1038/Nature11318  0.388
2012 Zaspel JM, Zahiri R, Hoy MA, Janzen D, Weller SJ, Wahlberg N. A molecular phylogenetic analysis of the vampire moths and their fruit-piercing relatives (Lepidoptera: Erebidae: Calpinae) Molecular Phylogenetics and Evolution. 65: 786-791. PMID 22796530 DOI: 10.1016/J.Ympev.2012.06.029  0.365
2012 Smith MA, Bertrand C, Crosby K, Eveleigh ES, Fernandez-Triana J, Fisher BL, Gibbs J, Hajibabaei M, Hallwachs W, Hind K, Hrcek J, Huang DW, Janda M, Janzen DH, Li Y, et al. Wolbachia and DNA barcoding insects: patterns, potential, and problems. Plos One. 7: e36514. PMID 22567162 DOI: 10.1371/Journal.Pone.0036514  0.525
2012 Quicke DL, Smith MA, Janzen DH, Hallwachs W, Fernandez-Triana J, Laurenne NM, Zaldívar-Riverón A, Shaw MR, Broad GR, Klopfstein S, Shaw SR, Hrcek J, Hebert PD, Miller SE, Rodriguez JJ, et al. Utility of the DNA barcoding gene fragment for parasitic wasp phylogeny (Hymenoptera: Ichneumonoidea): data release and new measure of taxonomic congruence. Molecular Ecology Resources. 12: 676-85. PMID 22487608 DOI: 10.1111/J.1755-0998.2012.03143.X  0.588
2012 Smith DR, Janzen DH, Hallwachs W, Smith MA. Hyperparasitoid wasps (Hymenoptera, Trigonalidae) reared from dry forest and rain forest caterpillars of Area de Conservación Guanacaste, Costa Rica Journal of Hymenoptera Research. 29: 119-144. DOI: 10.3897/Jhr.29.3233  0.328
2012 Janzen DH, Hallwachs W, Harvey DJ, Darrow K, Rougerie R, Hajibabaei M, Smith MA, Bertrand C, Gamboa IC, Espinoza B, Sullivan JB, Decaens T, Herbin D, Chavarria LF, Franco R, et al. What happens to the traditional taxonomy when a well-known tropical saturniid moth fauna is DNA barcoded? Invertebrate Systematics. 26: 478-505. DOI: 10.1071/Is12038  0.507
2011 Sharkey MJ, Clutts S, Tucker EM, Janzen D, Hallwachs W, Dapkey T, Smith MA. Lytopylus Förster (Hymenoptera, Braconidae, Agathidinae) species from Costa Rica, with an emphasis on specimens reared from caterpillars in Area de Conservación Guanacaste. Zookeys. 379-419. PMID 22259290 DOI: 10.3897/Zookeys.130.1569  0.403
2011 Pinto-Tomás AA, Sittenfeld A, Uribe-Lorío L, Chavarría F, Mora M, Janzen DH, Goodman RM, Simon HM. Comparison of midgut bacterial diversity in tropical caterpillars (Lepidoptera: Saturniidae) fed on different diets. Environmental Entomology. 40: 1111-22. PMID 22251723 DOI: 10.1603/En11083  0.346
2011 Janzen DH, Hallwachs W, Burns JM, Hajibabaei M, Bertrand C, Hebert PD. Reading the complex skipper butterfly fauna of one tropical place. Plos One. 6: e19874. PMID 21857895 DOI: 10.1371/Journal.Pone.0019874  0.508
2011 Janzen DH, Hallwachs W. Joining inventory by parataxonomists with DNA barcoding of a large complex tropical conserved wildland in northwestern Costa Rica. Plos One. 6: e18123. PMID 21857894 DOI: 10.1371/Journal.Pone.0018123  0.436
2011 Shokralla S, Zhou X, Janzen DH, Hallwachs W, Landry JF, Jacobus LM, Hajibabaei M. Pyrosequencing for mini-barcoding of fresh and old museum specimens. Plos One. 6: e21252. PMID 21818256 DOI: 10.1371/Journal.Pone.0021252  0.305
2011 Wilson JJ, Rougerie R, Schonfeld J, Janzen DH, Hallwachs W, Hajibabaei M, Kitching IJ, Haxaire J, Hebert PD. When species matches are unavailable are DNA barcodes correctly assigned to higher taxa? An assessment using sphingid moths. Bmc Ecology. 11: 18. PMID 21806794 DOI: 10.1186/1472-6785-11-18  0.453
2011 Shevtsova E, Hansson C, Janzen DH, Kjærandsen J. Stable structural color patterns displayed on transparent insect wings. Proceedings of the National Academy of Sciences of the United States of America. 108: 668-73. PMID 21199954 DOI: 10.1073/Pnas.1017393108  0.307
2011 Sharkey M, Clutts S, Tucker E, Janzen D, Hallwachs W, Dapkey T, Smith A. Appendix II. DELTA data matrix, images, and other files to species descriptions for Lytopylus of Costa Rica Zookeys. 130: 379. DOI: 10.3897/Zookeys.130.1569.App2  0.333
2011 Sharkey MJ, Clutts S, Tucker EM, Janzen D, Hallwachs W, Dapkey T, Alex Smith M. Lytopylus förster (Hymenoptera, Braconidae, Agathidinae) species from costa rica, with an emphasis on specimens reared from caterpillars in area de conservación guanacaste Zookeys. 130: 379-419. DOI: 10.3897/zookeys.130.1569  0.374
2011 Montero-Ramírez JJ, Janzen DH, Hallwachs W. A distinctive new species of euglyphis hübner (Lepidoptera: Lasiocampidae) from Costa Rica, with a checklist of the Euglyphis known from Costa Rica Zootaxa. 49-59. DOI: 10.11646/Zootaxa.3020.1.2  0.468
2010 Janzen DH, Hallwachs W, Burns JM. A tropical horde of counterfeit predator eyes. Proceedings of the National Academy of Sciences of the United States of America. 107: 11659-65. PMID 20547863 DOI: 10.1073/Pnas.0912122107  0.328
2010 Gleick PH, Adams RM, Amasino RM, Anders E, Anderson DJ, Anderson WW, Anselin LE, Arroyo MK, Asfaw B, Ayala FJ, Bax A, Bebbington AJ, Bell G, Bennett MV, Bennetzen JL, ... ... Janzen DH, et al. Climate change and the integrity of science. Science (New York, N.Y.). 328: 689-90. PMID 20448167 DOI: 10.1126/Science.328.5979.689  0.651
2010 Burns JM, Janzen DH, Hallwachs W. Of many similar species in the Neotropical genus Porphyrogenes (Lepidoptera: Hesperiidae), a new one, repeatedly reared in Costa Rica, is relatively distinct Proceedings of the Entomological Society of Washington. 112: 32-42. DOI: 10.4289/0013-8797-112.1.32  0.391
2010 Wilson JJ, Landry JF, Janzen DH, Hallwachs W, Nazari V, Hajibabaei M, Hebert PDN. Identity of the ailanthus webworm moth (Lepidoptera, Yponomeutidae), a complex of two species: Evidence from DNA barcoding, morphology and ecology Zookeys. 46: 41-60. DOI: 10.3897/Zookeys.46.406  0.472
2010 Burns JM, Janzen DH, Hallwachs W, Hajibabaei M, Hebert PDN. Genitalia, DNA barcodes, larval facies, and foodplants place the mimetic species neoxeniades molion in rhinthon (Hesperiidae: Hesperiinae) Journal of the Lepidopterists' Society. 64: 69-78. DOI: 10.18473/Lepi.V64I2.A2  0.483
2009 Janzen DH, Hallwachs W, Blandin P, Burns JM, Cadiou JM, Chacon I, Dapkey T, Deans AR, Epstein ME, Espinoza B, Franclemont JG, Haber WA, Hajibabaei M, Hall JP, Hebert PD, et al. Integration of DNA barcoding into an ongoing inventory of complex tropical biodiversity. Molecular Ecology Resources. 9: 1-26. PMID 21564960 DOI: 10.1111/J.1755-0998.2009.02628.X  0.658
2009 Regier JC, Zwick A, Cummings MP, Kawahara AY, Cho S, Weller S, Roe A, Baixeras J, Brown JW, Parr C, Davis DR, Epstein M, Hallwachs W, Hausmann A, Janzen DH, et al. Toward reconstructing the evolution of advanced moths and butterflies (Lepidoptera: Ditrysia): an initial molecular study. Bmc Evolutionary Biology. 9: 280. PMID 19954545 DOI: 10.1186/1471-2148-9-280  0.387
2009 Grinter CC, Whitfield JB, Connahs H, Dyer LA, Hallwachs W, Janzen DH. A key to new world distatrix mason (Hymenoptera: Braconidae), with descriptions of six new reared neotropical species. Journal of Insect Science (Online). 9: 29. PMID 19619026 DOI: 10.1673/031.009.2901  0.6
2009 Solis MA, Metz MA, Janzen DH. Phylogenetic analysis of Cosmopterosis (Lepidoptera: Crambidae: Glaphyriinae) with discussions on male secondary sexual characters and larval feeding on Capparis (Capparaceae) in the Pyraloidea and Lepidoptera (Insecta) Annals of the Entomological Society of America. 102: 766-784. DOI: 10.1603/008.102.0504  0.42
2009 Valerio AA, Whitfield JB, Janzen DH. Review of world parapanteles ashmead (Hymenoptera: Braconidae: Microgastrinae), with description of fourteen new neotropical species and the first description of the final instar larvae Zootaxa. 1-49. DOI: 10.11646/Zootaxa.2084.1.1  0.556
2009 JANZEN DH, POND CM. A comparison, by sweep sampling, of the arthropod fauna of secondary vegetation in Michigan, England and Costa Rica Transactions of the Royal Entomological Society of London. 127: 33-50. DOI: 10.1111/J.1365-2311.1975.Tb00551.X  0.321
2008 Smith MA, Rodriguez JJ, Whitfield JB, Deans AR, Janzen DH, Hallwachs W, Hebert PD. Extreme diversity of tropical parasitoid wasps exposed by iterative integration of natural history, DNA barcoding, morphology, and collections. Proceedings of the National Academy of Sciences of the United States of America. 105: 12359-64. PMID 18716001 DOI: 10.1073/Pnas.0805319105  0.664
2008 Burns JM, Janzen DH, Hajibabaei M, Hallwachs W, Hebert PD. DNA barcodes and cryptic species of skipper butterflies in the genus Perichares in Area de Conservacion Guanacaste, Costa Rica. Proceedings of the National Academy of Sciences of the United States of America. 105: 6350-5. PMID 18436645 DOI: 10.1073/Pnas.0712181105  0.404
2007 Smith MA, Wood DM, Janzen DH, Hallwachs W, Hebert PD. DNA barcodes affirm that 16 species of apparently generalist tropical parasitoid flies (Diptera, Tachinidae) are not all generalists. Proceedings of the National Academy of Sciences of the United States of America. 104: 4967-72. PMID 17360352 DOI: 10.1073/Pnas.0700050104  0.498
2007 Koziak ATE, Diaz FC, Diaz J, Garcia M, Janzen DH, Thorn RG. Costa Rican species of Nematoctonus (anamorphic Pleurotaceae) Canadian Journal of Botany. 85: 749-761. DOI: 10.1139/B07-049  0.376
2007 Burns JM, Janzen DH, Hajibabaei M, Hallwachs W, Hebert PDN. DNA barcodes of closely related (but morphologically and ecologically distinct) species of skipper butterflies (Hesperiidae) can differ by only one to three nucleotides Journal of the Lepidopterists' Society. 61: 138-153.  0.32
2006 Rodríguez-Sánchez C, Sittenfeld A, Janzen DH, Espinoza AM. Bacillus thuringiensis in caterpillars and associated materials collected from protected tropical forests in northwestern Costa Rica. Revista De Biología Tropical. 54: 265-71. PMID 18494297 DOI: 10.15517/Rbt.V54I2.13867  0.416
2006 Smith MA, Woodley NE, Janzen DH, Hallwachs W, Hebert PD. DNA barcodes reveal cryptic host-specificity within the presumed polyphagous members of a genus of parasitoid flies (Diptera: Tachinidae). Proceedings of the National Academy of Sciences of the United States of America. 103: 3657-62. PMID 16505365 DOI: 10.1073/Pnas.0511318103  0.469
2006 Hajibabaei M, Janzen DH, Burns JM, Hallwachs W, Hebert PD. DNA barcodes distinguish species of tropical Lepidoptera. Proceedings of the National Academy of Sciences of the United States of America. 103: 968-71. PMID 16418261 DOI: 10.1073/Pnas.0510466103  0.465
2006 Hajibabaei M, Smith MA, Janzen DH, Rodriguez JJ, Whitfield JB, Hebert PDN. A minimalist barcode can identify a specimen whose DNA is degraded Molecular Ecology Notes. 6: 959-964. DOI: 10.1111/J.1471-8286.2006.01470.X  0.551
2005 Stireman JO, Dyer LA, Janzen DH, Singer MS, Lill JT, Marquis RJ, Ricklefs RE, Gentry GL, Hallwachs W, Coley PD, Barone JA, Greeney HF, Connahs H, Barbosa P, Morais HC, et al. Climatic unpredictability and parasitism of caterpillars: implications of global warming. Proceedings of the National Academy of Sciences of the United States of America. 102: 17384-7. PMID 16293686 DOI: 10.1073/Pnas.0508839102  0.479
2005 Janzen DH, Hajibabaei M, Burns JM, Hallwachs W, Remigio E, Hebert PD. Wedding biodiversity inventory of a large and complex Lepidoptera fauna with DNA barcoding. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences. 360: 1835-45. PMID 16214742 DOI: 10.1098/Rstb.2005.1715  0.499
2005 Kress WJ, Wurdack KJ, Zimmer EA, Weigt LA, Janzen DH. Use of DNA barcodes to identify flowering plants. Proceedings of the National Academy of Sciences of the United States of America. 102: 8369-74. PMID 15928076 DOI: 10.1073/Pnas.0503123102  0.433
2005 Valerio AA, Rodriguez JJ, Whitfield JB, Janzen DH. Prasmodon zlotnicki, a new Neotropical species of the genus Prasmodon Nixon (Braconidae: Microgastrinae) from Costa Rica, with the first host records for the genus Zootaxa. 1016: 29-38. DOI: 10.11646/Zootaxa.1016.1.4  0.663
2005 Agosta SJ, Janzen DH. Body size distributions of large Costa Rican dry forest moths and the underlying relationship between plant and pollinator morphology Oikos. 108: 183-193. DOI: 10.1111/J.0030-1299.2005.13504.X  0.371
2005 Arroyo-Mora JP, Sánchez-Azofeifa GA, Rivard B, Calvo JC, Janzen DH. Dynamics in landscape structure and composition for the Chorotega region, Costa Rica from 1960 to 2000 Agriculture, Ecosystems and Environment. 106: 27-39. DOI: 10.1016/J.Agee.2004.07.002  0.304
2005 Valerio AA, Rodriguez JJ, Whitfield JB, Janzen DH. Prasmodon zlotnicki, a new Neotropical species of the genus Prasmodon Nixon (Braconidae: Microgastrinae) from Costa Rica, with the first host records for the genus Zootaxa. 29-38.  0.592
2005 Burns JM, Janzen DH. Pan-neotropical genus Venada (Hesperiidae: Pyrginae) is not monotypic: Four new species occur on one volcano in the Area de Conservación Guanacaste, Costa Rica Journal of the Lepidopterists' Society. 59: 19-34.  0.386
2004 Bawa KS, Kress WJ, Nadkarni NM, Lele S, Raven PH, Janzen DH, Lugo AE, Ashton PS, Lovejoy TE. Tropical ecosystems into the 21st century. Science (New York, N.Y.). 306: 227-8. PMID 15472058 DOI: 10.1126/Science.306.5694.227B  0.354
2004 Hebert PD, Penton EH, Burns JM, Janzen DH, Hallwachs W. Ten species in one: DNA barcoding reveals cryptic species in the neotropical skipper butterfly Astraptes fulgerator. Proceedings of the National Academy of Sciences of the United States of America. 101: 14812-7. PMID 15465915 DOI: 10.1073/Pnas.0406166101  0.493
2004 Hall JPW, Harvey DJ, Janzen DH. Life history of Calydna sturnula with a review of larval and pupal balloon setae in the riodinidae (lepidoptera) Annals of the Entomological Society of America. 97: 310-321. DOI: 10.1603/0013-8746(2004)097[0310:Lhocsw]2.0.Co;2  0.345
2004 Gauld ID, Janzen DH. The systematics and biology of the Costa Rican species of parasitic wasps in the Thyreodon genus-group (Hymenoptera: Ichneumonidae) Zoological Journal of the Linnean Society. 141: 297-351. DOI: 10.1111/J.1096-3642.2004.00116.X  0.475
2004 Kalacska M, Sanchez-Azofeifa GA, Calvo-Alvarado JC, Quesada M, Rivard B, Janzen DH. Species composition, similarity and diversity in three successional stages of a seasonally dry tropical forest Forest Ecology and Management. 200: 227-247. DOI: 10.1016/J.Foreco.2004.07.001  0.422
2003 Causey D, Trimble J, Hallwachs W, Brooks D, Janzen D. Migratory birds and the spread of West Nile [1] Science. 299: 821. PMID 12575705 DOI: 10.1126/Science.299.5608.821B  0.381
2003 Janzen DH. How does an “All Taxa Biodiversity Inventory (ATBI)” promote and facilitate local and global biodiversity conservation? Biodiversity. 4: 4-10. DOI: 10.1080/14888386.2003.9712683  0.363
2002 Janzen D. Monteverde: Ecology and Conservation of a Tropical Cloud Forest. Edited by Nalini M  Nadkarni and, Nathaniel T  Wheelwright. Oxford and New York: Oxford University Press. $130.00 (hardcover); $34.95 (paper). xxiii + 573 p + 8 pl; ill.; index. ISBN: 0–19–509560‐X (hc); 0–19–513310–2 (pb). 2000. The Quarterly Review of Biology. 77: 474-474. DOI: 10.1086/374500  0.307
2001 Lachance MA, Starmer WT, Rosa CA, Bowles JM, Barker JS, Janzen DH. Biogeography of the yeasts of ephemeral flowers and their insects. Fems Yeast Research. 1: 1-8. PMID 12702457 DOI: 10.1111/J.1567-1364.2001.Tb00007.X  0.419
2001 Lachance MA, Klemens JA, Bowles JM, Janzen DH. The yeast community of sap fluxes of Costa Rican Maclura (Chlorophora) tinctoria and description of two new yeast species, Candida galis and Candida ortonii. Fems Yeast Research. 1: 87-92. PMID 12702353 DOI: 10.1111/J.1567-1364.2001.Tb00019.X  0.429
2001 Lachance MA, Bowles JM, Kwon S, Marinoni G, Starmer WT, Janzen DH. Metschnikowia lochheadii and Metschnikowia drosophilae, two new yeast species isolated from insects associated with flowers. Canadian Journal of Microbiology. 47: 103-9. PMID 11261488 DOI: 10.1139/W00-130  0.443
2000 Burns JM, Janzen DH. Drephalys: Division of this showy neotropical genus, plus a new species and the immatures and food plants of two species from Costa Rican dry forest (Hesperiidae: Pyrginae) Journal of the Lepidopterists' Society. 53: 77-89.  0.401
1998 Pogue MG, Janzen DH. A revision of the genus Obrima Walker (Lepidoptera: Noctuidae), with a description of a new species from Costa Rica and notes on its natural history Proceedings of the Entomological Society of Washington. 100: 566-575.  0.382
1997 Flowers RW, Janzen DH. Feeding records of Costa Rican leaf beetles (Coleoptera: Chrysomelidae) Florida Entomologist. 80: 334-366. DOI: 10.2307/3495768  0.378
1996 Dangerfield PC, Whitfield JB, Sharkey MJ, Janzen DH, Mercado I. Hansonia, a new genus of cardiochiline braconidae (Hymenoptera) from Costa Rica, with notes on its biology Proceedings of the Entomological Society of Washington. 98: 592-596.  0.511
1995 Woodley NE, Janzen DH. A new species of melanagromyza (Diptera: Agromyzidae) mining leaves of bromelia pinguin (bromeliaceae) in a dry forest in costa rica Journal of Natural History. 29: 1329-1337. DOI: 10.1080/00222939500770551  0.387
1994 Janzen DH. Priorities in tropical biology. Trends in Ecology & Evolution. 9: 365-7. PMID 21236892 DOI: 10.1016/0169-5347(94)90053-1  0.306
1994 Gauld ID, Janzen DH. The classification, evolution and biology of the Costa Rican species of Cryptophion (Hymenoptera, Ichneumonidae) Zool.J.Linn.Soc.. 110: 297-324. DOI: 10.1111/J.1096-3642.1994.Tb01477.X  0.479
1992 Janzen DH. The Neotropics Ecological Restoration. 10: 8-13. DOI: 10.3368/er.10.1.8  0.356
1992 Gauld ID, Gaston KJ, Janzen DH. Plant allelochemicals, tritrophic interactions and the anomalous diversity of tropical parasitoids: the "nasty' host hypothesis Oikos. 65: 353-357. DOI: 10.2307/3545032  0.401
1990 Janzen DH, Fellows LE, Waterman PG. What protects Lonchocarpus (Leguminosae) seeds in a Costa Rican dry forest? Biotropica. 22: 272-285. DOI: 10.2307/2388538  0.367
1988 Janzen DH. Management of Habitat Fragments in a Tropical Dry Forest: Growth Annals of the Missouri Botanical Garden. 75: 105. DOI: 10.2307/2399468  0.309
1988 Janzen DH. Ecological characterization of a Costa Rican dry forest caterpillar fauna Biotropica. 20: 120-135. DOI: 10.2307/2388184  0.522
1988 Bernays EA, Janzen DH. Saturniid and sphingid caterpillars: two ways to eat leaves Ecology. 69: 1153-1160. DOI: 10.2307/1941269  0.389
1988 Janzen DH. On the Broadening of Insect-Plant Research Ecology. 69: 905-905. DOI: 10.2307/1941242  0.417
1988 Bleiler JA, Rosenthal GA, Janzen DH. Biochemical ecology of canavanine-eating seed predators Ecology. 69: 427-433. DOI: 10.2307/1940441  0.348
1987 Janzen DH. Forest restoration in costa rica. Science (New York, N.Y.). 235: 15c-6c. PMID 17769292 DOI: 10.1126/Science.235.4784.15C  0.317
1987 Janzen DH, Savage JM, Villa J. Herpetofauna of Costa Rica/Herpetofauna de Costa Rica Copeia. 1987: 1078. DOI: 10.2307/1445585  0.359
1987 Janzen DH. Insect diversity of a Costa Rican dry forest: why keep it, and how? Biological Journal of the Linnean Society. 30: 343-356. DOI: 10.1111/J.1095-8312.1987.Tb00307.X  0.517
1987 Janzen DH. How moths pass the dry season in a Costa Rican dry forest International Journal of Tropical Insect Science. 8: 489-500. DOI: 10.1017/S1742758400022530  0.489
1986 Janzen DH, Ryan CA, Liener IE, Pearce G. Potentially defensive proteins in mature seeds of 59 species of tropical leguminosae. Journal of Chemical Ecology. 12: 1469-80. PMID 24307125 DOI: 10.1007/Bf01012365  0.445
1986 Janzen DH. The future of tropical ecology Annual Review of Ecology and Systematics. Vol. 17. 305-324. DOI: 10.1146/Annurev.Es.17.110186.001513  0.343
1986 Janzen DH. The Amazon. Limnology and Landscape Ecology of a Mighty Tropical River and Its Basin. Monographiae Biologicae, Volume 56.Harald Sioli The Quarterly Review of Biology. 61: 133-134. DOI: 10.1086/414836  0.307
1986 Janzen DH. Spondias mombin is culturally deprived in megafauna-free forest Journal of Tropical Ecology. 1: 131-155. DOI: 10.1017/S0266467400000195  0.373
1985 Janzen DH. On Ecological Fitting Oikos. 45: 308-310. DOI: 10.2307/3565565  0.306
1985 Janzen DH, Adams RM. Degradation of Tropical Forests: A Dialogue Bulletin of the Entomological Society of America. 31: 10-13. DOI: 10.1093/Besa/31.1.10  0.308
1985 Janzen DH. Mangroves: Where's the understory? Journal of Tropical Ecology. 1: 89-92. DOI: 10.1017/S0266467400000122  0.432
1984 Janzen DH, Waterman PG. A seasonal census of phenolics, fibre and alkaloids in foliage of forest trees in Costa Rica: some factors influencing their distribution and relation to host selection by Sphingidae and Saturniidae Biological Journal of the Linnean Society. 21: 439-454. DOI: 10.1111/J.1095-8312.1984.Tb01605.X  0.451
1984 Janzen DH. Dispersal of small seeds by big herbivores: foliage is the fruit American Naturalist. 123: 338-353. DOI: 10.1086/284208  0.417
1983 Janzen DH. Seed and pollen dispersal by animals: Convergence in the ecology of contamination and sloppy harvest Biological Journal of the Linnean Society. 20: 103-113. DOI: 10.1111/J.1095-8312.1983.Tb01592.X  0.307
1983 Janzen DH. No park is an island: increase in interference from outside as park size decreases Oikos. 41: 402-410. DOI: 10.1007/978-1-4612-4018-1_18  0.362
1982 Janzen DH, Martin PS. Neotropical anachronisms: the fruits the gomphotheres ate. Science (New York, N.Y.). 215: 19-27. PMID 17790450 DOI: 10.1126/Science.215.4528.19  0.433
1982 Janzen DH. Ecological Distribution of Chlorophyllous Developing Embryos among Perennial Plants in a Tropical Deciduous Forest Biotropica. 14: 232. DOI: 10.2307/2388030  0.386
1982 Janzen DH. How and Why Horses Open Crescentia alata Fruits Biotropica. 14: 149. DOI: 10.2307/2387746  0.368
1982 Janzen DH. Removal of seeds from horse dung by tropical rodents: influence of habitat and amount of dung Ecology. 63: 1887-1900. DOI: 10.2307/1940128  0.354
1982 Janzen DH, DeVries PJ, Higgins ML, Kimsey LS. Seasonal and Site Variation in Costa Rican Euglossine Bees at Chemical Baits in Lowland Deciduous and Evergreen Forests Ecology. 63: 66-74. DOI: 10.2307/1937032  0.405
1982 Johnson CD, Janzen DH. Why Are Seeds of the Central American Guanacaste Tree, Enterolobium cyclocarpum , 1 Not Attacked by Bruchids 2 Except in Panam? Environmental Entomology. 11: 373-377. DOI: 10.1093/Ee/11.2.373  0.344
1982 Janzen DH, Lynn DG, Fellows LE, Hallwachs W. The indole alkaloid, hypaphorine and Pterocarpus seed protection Phytochemistry. 21: 1035-1037. DOI: 10.1016/S0031-9422(00)82411-5  0.315
1982 Janzen DH. Cenizero tree ( Leguminosae: Pithecellobium saman) delayed fruit development in Costa Rican deciduous forests American Journal of Botany. 69: 1269-1276. DOI: 10.1002/J.1537-2197.1982.Tb13372.X  0.425
1982 Janzen DH. Fruit traits, and seed consumption by rodents, of Crescentia alata ( Bignoniaceae) in Santa Rosa National Park, Costa Rica American Journal of Botany. 69: 1258-1268. DOI: 10.1002/J.1537-2197.1982.Tb13371.X  0.425
1982 Janzen DH. Natural history of guacimo fruits ( Sterculiaceae: Guazuma ulmifolia) with respect to consumption by large mammals American Journal of Botany. 69: 1240-1250. DOI: 10.1002/J.1537-2197.1982.Tb13369.X  0.361
1982 Janzen DH. VARIATION IN AVERAGE SEED SIZE AND FRUIT SEEDINESS IN A FRUIT CROP OF A GUANACASTE TREE (LEGUMINOSAE: ENTEROLOBIUM CYCLOCARPUM) American Journal of Botany. 69: 1169-1178. DOI: 10.1002/J.1537-2197.1982.Tb13361.X  0.313
1981 Janzen DH. Reduction in Euglossine Bee Species Richness on Isla del Cano, a Costa Rican Offshore Island Biotropica. 13: 238. DOI: 10.2307/2388135  0.479
1981 Janzen DH. Patterns of herbivory in a tropical deciduous forest Biotropica. 13: 271-282. DOI: 10.2307/2387805  0.487
1981 Janzen DH. Enterolobium Cyclocarpum Seed Passage Rate and Survival in Horses, Costa Rican Pleistocene Seed Dispersal Agents Ecology. 62: 593-601. DOI: 10.2307/1937726  0.315
1981 Janzen DH. Guanacaste Tree Seed-Swallowing by Costa Rican Range Horses Ecology. 62: 587-592. DOI: 10.2307/1937725  0.31
1981 Janzen DH. The Peak in North American Ichneumonid Species Richness Lies Between 38 Degrees and 42 Degrees N Ecology. 62: 532-537. DOI: 10.2307/1937717  0.401
1980 Janzen DH. WHEN IS IT COEVOLUTION? Evolution; International Journal of Organic Evolution. 34: 611-612. PMID 28568694 DOI: 10.1111/J.1558-5646.1980.Tb04849.X  0.406
1980 Janzen DH, DeVries P, Gladstone DE, Higgins ML, Lewinsohn TM. Self-and Cross-Pollination of Encyclia cordigera (Orchidaceae) in Santa Rosa National Park, Costa Rica Biotropica. 12: 72. DOI: 10.2307/2387776  0.333
1980 Janzen DH. Specificity of Seed-Attacking Beetles in a Costa Rican Deciduous Forest The Journal of Ecology. 68: 929. DOI: 10.2307/2259466  0.509
1979 Janzen DH. How Many Babies Do Figs Pay for Babies? Biotropica. 11: 48. DOI: 10.2307/2388172  0.417
1979 Janzen DH. How Many Parents Do the Wasps from a Fig Have? Biotropica. 11: 127. DOI: 10.2307/2387789  0.3
1979 Janzen DH. How to be a Fig Annual Review of Ecology and Systematics. 10: 13-51. DOI: 10.1146/Annurev.Es.10.110179.000305  0.454
1977 Janzen DH, McKey D. Musanga cecropiodes Is a Cecropia Without Its Ants Biotropica. 9: 57. DOI: 10.2307/2387861  0.586
1977 Janzen DH. How Southern Cowpea Weevil Larvae (Bruchidae: Callosobruchus Maculatus) Die on Nonhost Seeds Ecology. 58: 921-927. DOI: 10.2307/1936229  0.34
1977 Janzen DH. VARIATION IN SEED SIZE WITHIN A CROP OF A COSTA RICAN MUCUNA ANDREANA (LEGUMINOSAE) American Journal of Botany. 64: 347-349. DOI: 10.1002/J.1537-2197.1977.Tb15736.X  0.331
1976 Janzen DH. The Occurrence of the Human Warble Fly (Dermatobia hominis) in the Dry Deciduous Forest Lowlands of Costa Rica Biotropica. 8: 210. DOI: 10.2307/2989687  0.316
1976 Janzen DH. Why Tropical Trees Have Rotten Cores Biotropica. 8: 110. DOI: 10.2307/2989630  0.305
1976 Janzen DH, Miller GA, Hackforth-Jones J, Pond CM, Hooper K, Janos DP. Two Costa Rican Bat-Generated Seed Shadows of Andira Inermis (Leguminosae) Ecology. 57: 1068-1075. DOI: 10.2307/1941072  0.329
1976 Janzen DH. The Depression of Reptile Biomass by Large Herbivores The American Naturalist. 110: 371-400. DOI: 10.1086/283074  0.367
1975 Janzen DH. Behavior of Hymenaea courbaril When Its Predispersal Seed Predator Is Absent. Science (New York, N.Y.). 189: 145-7. PMID 17835771 DOI: 10.1126/Science.189.4197.145  0.327
1975 Janzen DH. Pseudomyrmex nigropilosa: A Parasite of a Mutualism. Science (New York, N.Y.). 188: 936-7. PMID 17749814 DOI: 10.1126/Science.188.4191.936  0.433
1975 Janzen DH, McKey D. What the Tropical Trappers Leave Behind Biotropica. 7: 7. DOI: 10.2307/2989793  0.531
1975 Janzen DH. Intra- and Interhabitat Variations in Guazuma ulmifolia (Sterculiaceae) Seed Predation by Amblycerus Cistelinus (Bruchidae) in Costa Rica Ecology. 56: 1009-1013. DOI: 10.2307/1936314  0.391
1974 Janzen DH, Wilson DE. The Cost of Being Dormant in the Tropics Biotropica. 6: 260. DOI: 10.2307/2989669  0.3
1974 Janzen DH. Epiphytic Myrmecophytes in Sarawak: Mutualism Through the Feeding of Plants by Ants Biotropica. 6: 237. DOI: 10.2307/2989668  0.371
1974 Freeland WJ, Janzen DH. Strategies in Herbivory by Mammals: The Role of Plant Secondary Compounds The American Naturalist. 108: 269-289. DOI: 10.1086/282907  0.312
1973 Rehr SS, Feeny PP, Janzen DH. Chemical Defence in Central American Non-Ant-Acacias The Journal of Animal Ecology. 42: 405. DOI: 10.2307/3294  0.434
1973 Janzen DH. Evolution of Polygynous Obligate Acacia-Ants in Western Mexico The Journal of Animal Ecology. 42: 727. DOI: 10.2307/3134  0.365
1973 Janzen DH. Rate of Regeneration after a Tropical High Elevation Fire Biotropica. 5: 117. DOI: 10.2307/2989661  0.337
1973 Janzen DH. Sweep Samples of Tropical Foliage Insects: Effects of Seasons, Vegetation Types, Elevation, Time of Day, and Insularity Ecology. 54: 687-708. DOI: 10.2307/1935359  0.471
1973 Carroll CR, Janzen DH. Ecology of Foraging by Ants Annual Review of Ecology and Systematics. 4: 231-257. DOI: 10.1146/ANNUREV.ES.04.110173.001311  0.312
1973 Janzen DH. Host Plants as Islands. II. Competition in Evolutionary and Contemporary Time The American Naturalist. 107: 786-790. DOI: 10.1086/282876  0.301
1973 Rehr SS, Bell EA, Janzen DH, Feeny PP. Insecticidal amino acids in legume seeds Biochemical Systematics and Ecology. 1: 63-67. DOI: 10.1016/0305-1978(73)90038-0  0.343
1972 Wilson DE, Janzen DH. Predation on Scheelea Palm Seeds by Bruchid Beetles: Seed Density and Distance from the Parent Palm Ecology. 53: 954-959. DOI: 10.2307/1934315  0.378
1972 Janzen DH. Protection of Barteria (Passifloraceae) By Pachysima Ants (Pseudomyrmecinae) in a Nigerian Rain Forest Ecology. 53: 885-892. DOI: 10.2307/1934304  0.358
1972 Janzen DH. Escape in Space by Sterculia Apetala Seeds from the Bug Dysdercus Fasciatus in a Costa Rican Deciduous Forest Ecology. 53: 350-361. DOI: 10.2307/1934092  0.339
1972 Janzen DH. Association of a Rainforest Palm and Seed-Eating Beetles in Puerto Rico Ecology. 53: 258-261. DOI: 10.2307/1934079  0.339
1971 Janzen DH. Euglossine bees as long-distance pollinators of tropical plants. Science (New York, N.Y.). 171: 203-5. PMID 17751330 DOI: 10.1126/Science.171.3967.203  0.379
1971 Janzen DH. Escape of Cassia Grandis L. Beans From Predators in Time and Space Ecology. 52: 964-979. DOI: 10.2307/1933802  0.34
1971 Janzen DH. Seed Predation by Animals Annual Review of Ecology and Systematics. 2: 465-492. DOI: 10.1146/Annurev.Es.02.110171.002341  0.362
1971 Janzen DH. Escape of Juvenile Dioclea megacarpa (Leguminosae) Vines from Predators in a Deciduous Tropical Forest The American Naturalist. 105: 97-112. DOI: 10.1086/282709  0.349
1970 Janzen DH. Jacquinia pungens, a Heliophile from the Understory of Tropical Deciduous Forest Biotropica. 2: 112. DOI: 10.2307/2989768  0.435
1970 Janzen DH. Herbivores and the Number of Tree Species in Tropical Forests The American Naturalist. 104: 501-528. DOI: 10.1086/282687  0.483
1969 Janzen DH. Allelopathy by Myrmecophytes: The Ant Azteca as an Allelopathic Agent of Cecropia Ecology. 50: 147-153. DOI: 10.2307/1934677  0.422
1968 Janzen DH, Schoener TW. Differences in Insect Abundance and Diversity Between Wetter and Drier Sites During a Tropical Dry Season Ecology. 49: 96-110. DOI: 10.2307/1933565  0.468
1968 Janzen DH. Reproductive Behavior in the Passifloraceae and Some of its Pollinators in Central America Behaviour. 32: 33-48. DOI: 10.1163/156853968X00072  0.343
1968 Janzen D. Proceedings of the Symposium on the Biology of the California Islands Systematic Biology. 17: 93-94. DOI: 10.1093/Sysbio/17.1.93  0.331
1968 Janzen DH. Host Plants as Islands in Evolutionary and Contemporary Time The American Naturalist. 102: 592-595. DOI: 10.1086/282574  0.312
1968 Schoener TW, Janzen DH. Notes on Environmental Determinants of Tropical Versus Temperate Insect Size Patterns The American Naturalist. 102: 207-224. DOI: 10.1086/282538  0.394
1967 Janzen DH. SYNCHRONIZATION OF SEXUAL REPRODUCTION OF TREES WITHIN THE DRY SEASON IN CENTRAL AMERICA. Evolution; International Journal of Organic Evolution. 21: 620-637. PMID 28563685 DOI: 10.1111/J.1558-5646.1967.Tb03416.X  0.396
1967 Janzen DH. Fire, Vegetation Structure, and the Ant X Acacia Interaction in Central America Ecology. 48: 26-35. DOI: 10.2307/1933414  0.329
1967 Janzen DH. Why Mountain Passes are Higher in the Tropics The American Naturalist. 101: 233-249. DOI: 10.1086/282487  0.352
1966 Janzen DH. COEVOLUTION OF MUTUALISM BETWEEN ANTS AND ACACIAS IN CENTRAL AMERICA. Evolution; International Journal of Organic Evolution. 20: 249-275. PMID 28562970 DOI: 10.1111/J.1558-5646.1966.Tb03364.X  0.395
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