TEXAS

MITCHEL COUNTY

BIG SILVER CREEK

TECOVAS MEMBER

DOCKUM FORMATION

CARNIAN STAGE

LATE TRIASSIC EPOCH

LATE TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: AMPHIBIA LINNAEUS, 1758

SUBCLASS: LABYRINTHODONTIA OWEN, 1860

SUPERORDER: TEMNOSPONDYLIA ZITTEL, 1887

MICROORDER: LIMNARCHIA YATES & WARREN, 2000

ORDER: TREMATOSAURIA PIVETEAU, 1955

Superfamily: METOPOSAUROIDEA Watson, 1919

Family: METOPOSAURIDAE Watson, 1919

Subfamily: METOPOSAURINAE Watson, 1919

Koskinonodon perfectus
= Buettneria perfecta