18 past members
K. Christopher Beard
United States

Collected Nymphalidae and identified Lycaenidae

Collected Passeridae and identified Carabidae
Collected Ptilodontidae and identified Plagiomenidae
Collected Merycoidodontidae and identified Aspleniaceae
Collected Characidae and identified Characidae
Collected Asteraceae and identified Polyporaceae
Andrew L. Mack
Indonesia; Papua New Guinea

Collected Unionidae and identified Odontostomidae

Innokenty Tolmachoff
April 13, 1872 – January 17, 1950
Russian Empire; Russian Republic; United States of America

Collected Asteraceae and identified Liliaceae
Sarah C. Williams
United States

Collected Asteraceae and identified Zygophyllaceae

Collected Hyopsodontidae and identified Hyaenodontidae