Charles Emerson
Beecher

Yale (Systematics Tree)


Charles
Schuchert

Yale (Evolution Tree)


Carl Owen
Dunbar

Yale (Evolution Tree)


John
Imbrie

Brown (Geotree)


James Dwight
Dana

Yale (Terrestrial Ecology Tree)


Othniel Charles
Marsh

Yale (Geotree)


Charles Emerson
Beecher

Yale (Systematics Tree)


Charles
Schuchert

Yale (Evolution Tree)


Charles Emerson
Beecher

Yale (Systematics Tree)


Charles
Schuchert

Yale (Evolution Tree)


Carl Owen
Dunbar

Yale (Evolution Tree)


Norman Dennis
Newell

Columbia (Evolution Tree)

Louis S.
Kornicker

Columbia
(Options)

Louis KornickerX