Australophenidans and Shuotherium

DESCRIBER    Rich, Vickers-Rich, Constantine, Flannery, Kool & van Klaveren, 1999
TIME    Cretaceous Early
Aptian
CLADE    Yinotheria
CLASS    Mammalia
SUBCLASS    Australosphenida
ORDER    Monotremata
FAMILY    Steropodontidae
FOSSILSITE    Wonthaggi Formation, Victoria, Australia
INFO
Differs from Steropodon by notably smalller dimensions by having the lower molar (the single one known) less elongated mesiodorsally, whitin strongly compressed trigonid, and much narrower mesial and distal cingulids.