COLORADO
COOPER CANYON MEMBER
DOCKUM FORMATION
EARLY NORIAN EPOCH
MIDDLE LATE TRIASSIC EPOCH
LATE TRIASSIC COLORADO
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1904
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
GRANDORDER: RAUISUCHIFORMES PARRISH, 1993
ORDER: AETOSAURIA NICHOLSON & LYDEKKER, 1889
Family: STAGONOLEPIDIDAE Lydekker, 1887
Genus nova Taxon B
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