Taxa Count: 24

PACHYDISCIDAE

Anapachydiscus

Anapachydiscus peninsularis

Canadoceras

Canadoceras mysticum Matsumoto, 1954

Canadoceras newberryanum (Meek, 1876)

Canadoceras yokoyamai (Jimbo, 1894)

Eopachydiscus marcianus Cobban, 1987

Eupachydiscus

Eupachydiscus haradai usheri Matsumoto, 1959

Eupachydiscus lamberti (Collignon, 1938)

Eupachydiscus teshioensis (Jimbo, 1894)

Menuites

Menuites Spath, 1922

Menuites arrialoorensis (Stoliczka, 1865)

Menuites peninsularis (Anderson & Hanna, 1935)

Menuites portlocki complexus (Halll & Meek, 1856)

Pachydiscidae indet.

Pachydiscus

Pachydiscus (Neodesmoceras) catarinae (Anderson & Hanna, 1928)

Pachydiscus Zittel, 1884

Pachydiscus arkansanus (Stephenson, 1941)

Pachydiscus buckhami Usher, 1952

Pachydiscus catarinae Anderson & Hanna, 1935

Pachydiscus neevesi Whiteaves, 1903