Gondwanatherians

DESCRIBER    Bonaparte, 1986
TIME    Cretaceous Late
Campanian Maastrichtian
CLASS    Mammalia
SUBCLASS    Incertae Sedis
SUBORDER    Gondwanatheria
FAMILY    Sudamericidae
FOSSILSITE    Los Alamitos Formation, Rio Negro Province, Argentina
INFO

Differs from the Tertiary genus Sudamerica in being smaller, in having occlusal surface of the molars made of three asymmetrical lophs  and in having enamel strip arround occlusal surface divided into parts, rather than continious.