COLORADO

EAGLE BASIN

DERBY JUNCTION LOCALITY N OF DOTSERO

MAIN ELK CREEK LOCALITY

EQUIVALENT TO THE PETRIFIED FOREST FORMATION

CHINLE GROUP

CARNIAN-LOWER NORIAN STAGE

LATE TRIASSIC EPOCH

LATE TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA

SUPERLEGION: NEODIAPSIDA BENTON, 1985

LEGION: ARCHOSAUROMORPHA HUENE, 1946

SUPERCOHORT: CRUROTARSI SERENO & ARCUCCI, 1990

COHORT: CROCODYLOTARSI BENTON & CLARK, 1988

MAGNORDER: SUCHIA KREBS, 1974

SUPERORDER: PSEUDOSUCHIA ZITTEL 1887-1890

Incertae sedis

Gen. sp indet.

GRANDORDER: RAUISUCHIFORMES PARRISH, 1993

ORDER: AETOSAURIA NICHOLSON & LYDEKKER, 1889

Family: STAGONOLEPIDIDAE Lydekker, 1887

Subfamily: AETOSAURINAE Cope, 1889 (sensu Heckert & Lucas, 2000)

Aetosaurus sp

Subfamily: DESMATOSUCHINAE Huene, 1942

Paratypothorax sp

SUPERORDER: CROCODYLOMORPHA WALKER, 1968

ORDER: INCERTAE SEDIS

SUBORDER: SPHENOSUCHIA BONAPARTE, 1971

Family: SPHENOSUCHIDAE Huene, 1922

cf. Hesperosuchus