KUNGURIAN STATE

UPPERMOST ROTILEGENDES EPOCH

MIDDLE PERMIAN

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: PARAREPTILIA OLSON 1947

INFRACLASS: INCERTAE SEDIS

ORDER: PROGANOSAURIA BAUR, 1887

Family: MESOSAURIDAE Baur, 1889

Stereosternum tumidum
= Mesosaurus tumidum