The Earliest-Known Stem  Mammals

DESCRIBER    Datta & Das, 2001
TIME    Jurassic Early, Jurassic Middle
CLASS    Mammalia
SUBCLASS    Incertae Sedis
ORDER    Morganucodonta (Kermack, et al., 1973)
FAMILY    Megazostrodontidae (Gow, 1986)
FOSSILSITE    Kota Formation, Yamanapalli, Pranhita-Godavari Valley, Pradesh, India
INFO
Typespecies by monotype. The holotype is a single isolated tooth with three cusps in approximately linear alignment. Differs from all meganucodontans except Dinetherium and from kuehneotheriids in having a hypertrophied valley between cusps A and B.