Daniel H. Janzen, Ph. D. - Publications

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

213 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
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
2019 Zhang J, Cong Q, Rex EA, Hallwachs W, Janzen DH, Grishin NV, Gammon DB. Gypsy moth genome provides insights into flight capability and virus-host interactions. Proceedings of the National Academy of Sciences of the United States of America. PMID 30642971 DOI: 10.1073/pnas.1818283116  0.8
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  0.8
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  0.8
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  0.8
2018 Hebert PDN, Braukmann TWA, Prosser SWJ, Ratnasingham S, deWaard JR, Ivanova NV, Janzen DH, Hallwachs W, Naik S, Sones JE, Zakharov EV. A Sequel to Sanger: amplicon sequencing that scales. Bmc Genomics. 19: 219. PMID 29580219 DOI: 10.1186/s12864-018-4611-3  0.8
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  0.8
2017 Kang I, Chapman EG, Janzen DH, Hallwachs W, Tanya Dapkey, Smith MA, Sharkey MJ. Revision of the species of Lytopylus from Area de Conservación Guanacaste, northwestern Costa Rica (Hymenoptera, Braconidae, Agathidinae). Zookeys. 93-158. PMID 29308026 DOI: 10.3897/zookeys.721.20287  0.8
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  0.8
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  0.8
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  0.8
2017 Ge D, Wu G, Yang L, Kim HN, Hallwachs W, Burns JM, Janzen DH, Yang S. Varying and unchanging whiteness on the wings of dusk-active and shade-inhabiting Carystoides escalantei butterflies. Proceedings of the National Academy of Sciences of the United States of America. PMID 28652351 DOI: 10.1073/pnas.1701017114  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
2016 Schmiedel U, Araya Y, Bortolotto MI, Boeckenhoff L, Hallwachs W, Janzen D, Kolipaka SS, Novotny V, Palm M, Parfondry M, Smanis A, Toko P. Contributions of paraecologists and parataxonomists to research, conservation, and social development. Conservation Biology : the Journal of the Society For Conservation Biology. 30: 506-19. PMID 27111576 DOI: 10.1111/cobi.12661  0.8
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  0.8
2016 Regier JC, Mitter C, Mitter K, Cummings MP, Bazinet AL, Hallwachs W, Janzen DH, Zwick A. Further progress on the phylogeny of Noctuoidea (Insecta: Lepidoptera) using an expanded gene sample Systematic Entomology. DOI: 10.1111/syen.12199  0.8
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  0.8
2015 Nakahara S, Janzen DH, Hallwachs W, Espeland M. Description of a new genus for Euptychia hilara (C. Felder & R. Felder, 1867) (Lepidoptera: Nymphalidae: Satyrinae). Zootaxa. 4012: 525-41. PMID 26623873 DOI: 10.11646/zootaxa.4012.3.7  0.8
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  0.8
2015 Fleming AJ, Wood DM, Janzen D, Hallwachs W, Smith MA. Corrigendum: 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. e6459. PMID 26491396 DOI: 10.3897/BDJ.3.e6459  0.8
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  0.8
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  0.8
2015 Shokralla S, Porter TM, Gibson JF, Dobosz R, Janzen DH, Hallwachs W, Golding GB, Hajibabaei M. Massively parallel multiplex DNA sequencing for specimen identification using an Illumina MiSeq platform. Scientific Reports. 5: 9687. PMID 25884109 DOI: 10.1038/srep09687  0.8
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  0.8
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  0.8
2015 Smith MA, Janzen DH, Hallwachs W, Longino JT. Observations of Adelomyrmex (Hymenoptera: Formicidae) reproductive biology facilitated by digital field microscopy and DNA barcoding Canadian Entomologist. DOI: 10.4039/tce.2014.82  0.8
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  0.8
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  0.8
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  0.8
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  0.8
2015 Wang H, Wahlberg N, Holloway JD, Bergsten J, Fan X, Janzen DH, Hallwachs W, Wen L, Wang M, Nylin S. Molecular phylogeny of Lymantriinae (Lepidoptera, Noctuoidea, Erebidae) inferred from eight gene regions Cladistics. 31: 579-592. DOI: 10.1111/cla.12108  0.8
2015 Grishin NV, Janzen DH, Hallwachs W. A cryptic new Potamanaxas (Hesperiidae: Pyrginae: Erynnini) stands out by terminally elongated genitalic valvae Journal of Research On the Lepidoptera. 48: 13-20.  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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. PMID 25283171  0.8
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  0.8
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  0.8
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  0.8
2014 Shokralla S, Gibson JF, Nikbakht H, Janzen DH, Hallwachs W, Hajibabaei M. Next-generation DNA barcoding: using next-generation sequencing to enhance and accelerate DNA barcode capture from single specimens. Molecular Ecology Resources. 14: 892-901. PMID 24641208 DOI: 10.1111/1755-0998.12236  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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.  0.8
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.  0.8
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.  0.8
2013 Leisinger AK, Janzen DH, Hallwachs W, Igloi GL. Amino acid discrimination by the nuclear encoded mitochondrial arginyl-tRNA synthetase of the larva of a bruchid beetle (Caryedes brasiliensis) from northwestern Costa Rica. Insect Biochemistry and Molecular Biology. PMID 24514878 DOI: 10.1016/j.ibmb.2013.10.004  0.8
2013 Leisinger AK, Janzen DH, Hallwachs W, Igloi GL. Amino acid discrimination by the nuclear encoded mitochondrial arginyl-tRNA synthetase of the larva of a bruchid beetle (Caryedes brasiliensis) from northwestern Costa Rica. Insect Biochemistry and Molecular Biology. 43: 1172-80. PMID 24446543  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
2013 Smith DR, Janzen DH, Hallwachs W. Food plants and life histories of sawflies of the families Argidae and Tenthredinidae (Hymenoptera) in Costa Rica, a supplement Journal of Hymenoptera Research. 35: 17-31. DOI: 10.3897/JHR.35.5496  0.8
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  0.8
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  0.8
2013 Hossie TJ, Sherratt TN, Janzen DH, Hallwachs W. An eyespot that "blinks": An open and shut case of eye mimicry in Eumorpha caterpillars (Lepidoptera: Sphingidae) Journal of Natural History. 47: 2915-2926. DOI: 10.1080/00222933.2013.791935  0.8
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.  0.8
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.  0.8
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  0.8
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  0.8
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  0.8
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  0.8
2012 Rivera KG, Díaz J, Chavarría-Díaz F, Garcia M, Urb M, Thorn RG, Louis-Seize G, Janzen DH, Seifert KA. Penicillium mallochii and P. guanacastense two new species isolated from Costa Rican caterpillars Mycotaxon. 119: 315-328. DOI: 10.5248/119.315  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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.  0.8
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  0.8
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  0.8
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  0.8
2010 Janzen DH. Hope for Tropical Biodiversity through True Bioliteracy Biotropica. 42: 540-542. DOI: 10.1111/j.1744-7429.2010.00667.x  0.8
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.  0.8
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  0.8
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  0.8
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  0.8
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  0.8
2009 Burns JM, Janzen DH, Hallwachs W, Hajibabaei M, Hebert PDN. Genitalia, DNA barcodes, and life histories synonymize telles with thracides - A genus in which telles arcalaus looks out of place (Hesperiidae: Hesperiinae) Journal of the Lepidopterists' Society. 63: 141-153.  0.8
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.  0.8
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  0.8
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  0.8
2007 Pinto-Tomás A, Uribe-Lorío L, Blanco J, Fontecha G, Rodríguez C, Mora M, Janzen D, Chavarría F, Díaz J, Sittenfeld A. Enzymatic activities of bacteria isolated from the digestive tract of caterpillars and the pupal content of Automeris zugana and Rothschildia lebeau (Lepidoptera: Saturniidae) | Actividades enzimáticas en aislamientos bacterianos de tractos digestivos de larvas y del contenido de pupas de Automeris zugana y Rothschildia lebeau (Lepidoptera: Saturniidae) Revista De Biologia Tropical. 55: 401-415. PMID 19069755  0.8
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  0.8
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  0.8
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.  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
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  0.8
2005 Zettler LA, Laatsch AD, Zettler E, Nerad TA, Cole J, Diaz FC, Diaz J, Janzen DH, Sittenfeld A, Mason O, Reysenbach AL. A microbial observatory of caterpillars: isolation and molecular characterization of protists associated with the saturniid moth caterpillar Rothschildia lebeau. The Journal of Eukaryotic Microbiology. 52: 107-15. PMID 15817115 DOI: 10.1111/j.1550-7408.2005.05202008.x  0.8
2005 Arroyo-Mora JP, Sánchez-Azofeifa GA, Kalacska MER, Rivard B, Calvo-Alvarado JC, Janzen DH. Secondary forest detection in a neotropical dry forest landscape using Landsat 7 ETM+ and IKONOS imagery Biotropica. 37: 497-507. DOI: 10.1111/j.1744-7429.2005.00068.x  0.8
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  0.8
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  0.8
2005 Burns JM, Janzen DH. What's in a name? Lepidoptera: Hesperiidae: Pyrginae: Telemiades Hübner 1819 [Pyrdalus Mabille 1903]: New combinations Telemiades corbulo (Stoll) and Telemiades oiclus (Mabille) - And more Proceedings of the Entomological Society of Washington. 107: 770-781.  0.8
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.  0.8
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.  0.8
2004 Nielsen V, Hurtado P, Janzen DH, Tamayo G, Sittenfeld A. [Arthropod collection for biodiversity prospection in the Guanacaste Conservation Area, Costa Rica]. Revista De Biología Tropical. 52: 119-32. PMID 17357408  0.8
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  0.8
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  0.8
2004 Causey D, Janzen DH, Peterson AT, Vieglais D, Krishtalka L, Beach JH, Wiley EO. Museum collections and taxonomy. Science (New York, N.Y.). 305: 1106-7. PMID 15326336 DOI: 10.1126/science.305.5687.1106b  0.8
2004 Janzen DH. Now is the time. Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences. 359: 731-2. PMID 15253359 DOI: 10.1098/rstb.2003.1444  0.8
2004 Costa JT, Fitzgerald TD, Pescador-Rubio A, Mays J, Janzen DH. Social behavior of larvae of the neotropical processionary weevil Phelypera distigma (Boheman) (Coleoptera: Curculionidae: Hyperinae) Ethology. 110: 515-530. DOI: 10.1111/j.1439-0310.2004.00999.x  0.8
2004 Janzen DH. Setting up tropical biodiversity for conservation through non-damaging use: Participation by parataxonomists Journal of Applied Ecology. 41: 181-187. DOI: 10.1111/j.1365-2664.2004.00879.x  0.8
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  0.8
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  0.8
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.  0.8
2004 Janzen DH. Ecology of dry-forest wildland insects in the area de conservación guanacaste Biodiversity Conservation in Costa Rica: Learning the Lessons in a Seasonal Dry Forest. 80-96.  0.8
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  0.8
2003 Costa JT, Gotzek DA, Janzen DH. Late-instar shift in foraging strategy and trial pheromone use by caterpillars of the neotropical moth Arsenura armida (Cramer) (Saturniidae: Arsenurinae) Journal of the Lepidopterists' Society. 57: 220-229.  0.8
2002 Sittenfeld A, Uribe-Lorío L, Mora M, Nielsen V, Arrieta G, Janzen DH. Does a polyphagous caterpillar have the same gut microbiota when feeding on different species of food plants? Revista De Biología Tropical. 50: 547-60. PMID 12298285  0.8
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: 10.1016/S1567-1356(00)00003-9  0.8
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: 10.1016/S1567-1356(01)00016-2  0.8
2001 Lachance MA, Bowles JM, Chavarría Díaz MM, Janzen DH. Candida cleridarum, Candida tilneyi and Candida powellii, three new yeast species isolated from insects associated with flowers. International Journal of Systematic and Evolutionary Microbiology. 51: 1201-7. PMID 11411688  0.8
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/cjm-47-2-103  0.8
2001 Janzen DH. Saving fractured oases of biodiversity Quarterly Review of Biology. 76: 327-330. DOI: 10.1086/393990  0.8
2001 Burns JM, Janzen DH. Biodiversity of pyrrhopygine skipper butterflies (Hesperiidae) in the Area de Conservación Guanacaste, Costa Rica Journal of the Lepidopterists' Society. 55: 15-43.  0.8
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.  0.8
1999 Janzen D. Gardenification of tropical conserved wildlands: Multitasking, multicropping, and multiusers Proceedings of the National Academy of Sciences of the United States of America. 96: 5987-5994. PMID 10339529 DOI: 10.1073/pnas.96.11.5987  0.8
1999 Sittenfeld A, Tamayo G, Nielsen V, Jimenez A, Hurtado P, Chinchilla M, Guerrero O, Mora MA, Rojas M, Blanco R, Alvarado E, Guttierrez JM, Janzen DH. Costa Rican international cooperative biodiversity group: Using insects and other arthropods in biodiversity prospecting Pharmaceutical Biology. 37: 55-68.  0.8
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.  0.8
1998 Western D, Benirschke K, Berger J, Janzen DH, Hallwachs W, Meffe GK, Myers N, Newmark WD, Woodruff DS, Bradbury J, Raven PH, Norman C. Wildlife conservation in Kenya (multiple letters) Science. 280: 1507-1511.  0.8
1997 Janzen DH. The carbon crop [1] Science. 277: 883. DOI: 10.1126/science.277.5328.883  0.8
1997 Flowers RW, Janzen DH. Feeding records of Costa Rican leaf beetles (Coleoptera: Chrysomelidae) Florida Entomologist. 80: 334-366.  0.8
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.  0.8
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  0.8
1995 Janzen DH. Who survived the cretaceous? [2] Science. 268: 785.  0.8
1994 Janzen DH. Priorities in tropical biology. Trends in Ecology & Evolution. 9: 365-7. PMID 21236892 DOI: 10.1016/0169-5347(94)90053-1  0.8
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: 10.1006/zjls.1994.1014  0.8
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.  0.8
1992 Janzen DH. Yucatan meteor: The real impact [5] Science. 258: 1071.  0.8
1990 Janzen DH, Fellows LE, Waterman PG. What protects Lonchocarpus (Leguminosae) seeds in a Costa Rican dry forest? Biotropica. 22: 272-285.  0.8
1988 Janzen DH. Tropical ecological and biocultural restoration. Science (New York, N.Y.). 239: 243-4. PMID 17769984 DOI: 10.1126/science.239.4837.243  0.8
1988 Bleiler JA, Rosenthal GA, Janzen DH. Biochemical ecology of canavanine-eating seed predators Ecology. 69: 427-433.  0.8
1988 Janzen DH. Ecological characterization of a Costa Rican dry forest caterpillar fauna Biotropica. 20: 120-135.  0.8
1988 Janzen DH. Co2 reduction and reforestation [3] Science. 242: 1493.  0.8
1988 Bernays EA, Janzen DH. Saturniid and sphingid caterpillars: two ways to eat leaves Ecology. 69: 1153-1160.  0.8
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  0.8
1987 Dodson CD, Stermitz FR, Oscar CC, Janzen DH. Neolignans from fruits of Ocotea veraguensis Phytochemistry. 26: 2037-2040. DOI: 10.1016/S0031-9422(00)81753-7  0.8
1987 Janzen DH. Conservation and agricultural economics Science. 236: 1159.  0.8
1987 Janzen DH. Forest restoration in Costa Rica [6] Science. 235: 15-16.  0.8
1987 Janzen DH. Revolutionary zeal Nature. 326: 221.  0.8
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  0.8
1986 Janzen DH. Spondias mombin is culturally deprived in megafauna-free forest Journal of Tropical Ecology. 1: 131-155. DOI: 10.1017/S0266467400000195  0.8
1986 Janzen DH. The future of tropical ecology Annual Review of Ecology and Systematics. Vol. 17. 305-324.  0.8
1986 Janzen DH. Chihuahuan Desert nopaleras: defaunated big mammal vegetation Annual Review of Ecology and Systematics. Vol. 17. 595-636.  0.8
1985 Rosenthal GA, Janzen DH. Ammonia utilization by the bruchid beetle,Caryedes brasiliensis [Bruchidae]. Journal of Chemical Ecology. 11: 539-44. PMID 24310075 DOI: 10.1007/BF00989564  0.8
1985 Evans SV, Fellows LE, Janzen DH, Chambers J, Hider RC. Erythro-γ-hydroxyhomo-L-arginine: An amino acid from seed of Lonchocarpus costaricensis, and its preferential interaction with borate Phytochemistry. 24: 1289-1292. DOI: 10.1016/S0031-9422(00)81117-6  0.8
1985 Janzen DH, Demment MW, Robertson JB. How fast and why do germinating guanacaste seeds ( Enterolobium cyclocarpum) die inside cows and horses? Biotropica. 17: 322-325.  0.8
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  0.8
1984 Janzen DH. Dispersal of small seeds by big herbivores: foliage is the fruit American Naturalist. 123: 338-353. DOI: 10.1086/284208  0.8
1983 Rosenthal GA, Janzen DH. Avoidance of nonprotein amino acid incorporation into protein by the seed predator,Caryedes brasiliensis (Bruchidae). Journal of Chemical Ecology. 9: 1353-61. PMID 24407865 DOI: 10.1007/BF00994804  0.8
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  0.8
1983 Rosenthal GA, Janzen DH. Arginase and L-canavanine metabolism by the bruchid beetle, Caryedes brasiliensis Entomologia Experimentalis Et Applicata. 34: 336-337. DOI: 10.1007/BF00186935  0.8
1983 Janzen DH. No park is an island: increase in interference from outside as park size decreases Oikos. 41: 402-410.  0.8
1983 Janzen DH. Seasonal change in abundance of large nocturnal dung beetles ( Scarabaeidae) in a Costa Rican deciduous forest and adjacent horse pasture Oikos. 41: 274-283.  0.8
1982 Rosenthal GA, Hughes CG, Janzen DH. L-Canavanine, a Dietary Nitrogen Source for the Seed Predator Caryedes brasiliensis (Bruchidae). Science (New York, N.Y.). 217: 353-5. PMID 17791516 DOI: 10.1126/science.217.4557.353  0.8
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  0.8
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  0.8
1982 Janzen DH. Attraction of Liomys mice to horse dung and the extinction of this response Animal Behaviour. 30: 483-489. DOI: 10.1016/S0003-3472(82)80060-2  0.8
1982 Janzen DH. How and why horses open Crescentia alata fruits ( Costa Rica) Biotropica. 14: 149-153.  0.8
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.  0.8
1982 Janzen DH. Variation in average seed size and fruit seediness in a fruit crop of a guanacaste tree ( Leguminosae: Enterolobium cyclocarpum) ( Costa Rica) American Journal of Botany. 69: 1169-1178.  0.8
1982 Janzen DH. Ecological distribution of chlorophyllous developing embryos among perennial plants in a tropical deciduous forest ( Costa Rica) Biotropica. 14: 232-236.  0.8
1982 Janzen DH, Martin PS. Pleistocene seed dispersal [4] Science. 216: 6.  0.8
1982 Janzen DH. Removal of seeds from horse dung by tropical rodents: influence of habitat and amount of dung Ecology. 63: 1887-1900.  0.8
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.  0.8
1982 Janzen DH. Cenizero tree ( Leguminosae: Pithecellobium saman) delayed fruit development in Costa Rican deciduous forests American Journal of Botany. 69: 1269-1276.  0.8
1981 Rosenthal GA, Janzen DH. Nitrogenous excretion by the terrestrial seed predator, Caryedes brasiliensis Biochemical Systematics and Ecology. 9: 219-220. DOI: 10.1016/0305-1978(81)90045-4  0.8
1981 Janzen DH. Patterns of herbivory in a tropical deciduous forest Biotropica. 13: 271-282.  0.8
1980 Janzen DH, Doerner ST, Conn EE. Seasonal constancy of intra-population variation of HCN content of costa rican Acacia farnesiana foliage Phytochemistry. 19: 2022-2023. DOI: 10.1016/0031-9422(80)83028-7  0.8
1980 Bell EA, Qureshi MY, Pryce RJ, Janzen DH, Lemke P, Clardy J. 2,4-Methanoproline(2-carboxy-2,4-methanopyrrolidine) and 2,4-methanoglutamic acid (1-amino-1,3-dicarboxycyclobutane) in seeds of Ateleia herbert smithii Pittier (leguminosae) Journal of the American Chemical Society. 102: 1409-1412.  0.8
1979 Clegg DO, Conn EE, Janzen DH. Developmental fate of the cyanogenic glucoside linamarin in Costa Rican wild lima bean seeds [8] Nature. 278: 343-344. DOI: 10.1038/278343a0  0.8
1979 Seigler DS, Conn EE, Dunn JE, Janzen DH. Cyanogenesis in Acacia farnesiana Phytochemistry. 18: 1389-1390. DOI: 10.1016/0031-9422(79)83029-0  0.8
1979 Fellows LE, Bell EA, Leet TS, Janzen DH. Tetrahydrolathyrine: A new amino acid from seeds of Lonchocarpus costaricensis Phytochemistry. 18: 1333-1335. DOI: 10.1016/0031-9422(79)83017-4  0.8
1978 Rosenthal GA, Dahlman DL, Janzen DH. L-Canaline detoxification: A seed predators's biochemical mechanism Science. 202: 528-529.  0.8
1978 Janzen DH. Defoliation heterogeneity over Costa Rican highways Environmental Conservation. 5: 246.  0.8
1977 Rosenthal GA, Janzen DH, Dahlman DL. Degradation and detoxification of canavanine by a specialized seed predator. Science (New York, N.Y.). 196: 658-60. PMID 854740  0.8
1977 Janzen DH, Juster HB, Arthur Bell E. Toxicity of secondary compounds to the seed-eating larvae of the bruchid beetle Callosobruchus maculatus Phytochemistry. 16: 223-227.  0.8
1976 Janzen DH, Juster HB, Liener IE. Insecticidal action of the phytohemagglutinin in black beans on a bruchid beetle. Science (New York, N.Y.). 192: 795-6. PMID 1265481  0.8
1976 Rosenthal GA, Dahlman DL, Janzen DH. A novel means for dealing with L-canavanine, a toxic metabolite. Science (New York, N.Y.). 192: 256-8. PMID 1257764  0.8
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  0.8
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  0.8
1973 Janzen DH. Tropical Agroecosystems: These habitats are misunderstood by the temperate zones, mismanaged by the tropics. Science (New York, N.Y.). 182: 1212-9. PMID 17811308 DOI: 10.1126/science.182.4118.1212  0.8
1973 Rehr SS, Janzen DH, Feeny PP. L-dopa in legume seeds: a chemical barrier to insect attack. Science (New York, N.Y.). 181: 81-2. PMID 17769830 DOI: 10.1126/science.181.4094.81  0.8
1973 Janzen DH. Community Structure of Secondary Compounds in Plants Pure and Applied Chemistry. 34: 529-538. DOI: 10.1351/pac197334030529  0.8
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  0.8
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  0.8
1971 Bell EA, Janzen DH. Medical and ecological considerations of L-dopa and 5-HTP in seeds. Nature. 229: 136-7. PMID 4923106 DOI: 10.1038/229136a0  0.8
1969 Janzen DH, Muller CH. Coevolution. Science (New York, N.Y.). 165: 415-6. PMID 5789440  0.8
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