Karl Alfred
von Zittel

Universität München (Evolution Tree)


John C.
Merriam

Carnegie Institution of Washington (Evolution Tree)


Bruce Lawrence
Clark

UC Berkeley (Geotree)


Hubert Gregory
Schenck

Stanford (Geotree)

Robert G.
Strom

University of Arizona
(Options)

Nadine Gail
Barlow

Northern Arizona University (Astronomy Tree)

Philip T
Metzger

University of Central Florida

Robert StromX