Allotherians

DESCRIBER    Simpson, 1926
TIME    Jurassic Late
CLASS    Mammalia
SUBCLASS    Allotheria
ORDER    Multituberculata
SUBORDER    Plagiaulacida
FAMILY    Allodontidae
FOSSILSITE    Morrison Formation, Wyoming, United States
INFO
Differs from Ctenacodon in having upper premolar cusps strongly ribbed