ARGENTINA
NC SANTA CRUZ PROVINCE
LA COLORADA
LAGUNA COLORADA FORMATION
EL TRANQUILO GROUP (UPPER EL TRANQUILO FORMATION)
COLORADENSE SUPERIOR
?NORIAN STAGE
MIDDLE LATE TRIASSIC EPOCH
LATE TRIASSIC
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1904
SUPERLEGION: NEODIAPSIDA BENTON, 1985
LEGION: ARCHOSAUROMORPHA HUENE, 1946
SUBLEGION: DINOSAUROMORPHA BENTON & NORMAN IN BENTON, 1985
INFRALEGION: DINOSAURIFORMES NOVAS, 1992
SUPERCOHORT: DINOSAURIA OWEN, 1842
COHORT: ORNITHISCHIFORMES COOPER, 1985
SUPERORDER: SAUROPODOMORPHA HUENE, 1932
ORDER: PROSAUROPODA HUENE, 1920 (emend)
SUBORDER: PLATEOSAURIA TORNIER, 1913
Family: PLATEOSAURIDAE Marsh, 1895
*Mussaurus patagonicus
MAGNORDER: ORNITHISCHIA SEELEY, 1888
SUPERORDER: NEORNITHISCHIA COOPER, 1985
GRANDORDER: ORNITHOPODA MARSH, 1871
MICRORDER: MARGINOCEPHALIA SERENO, 1986
ORDER: HETERODONTOSAURIA COOPER, 1985 (emend)
Family: HETERODONTOSAURIDAE Kuhn, 1966
cf. Heterodontosaurus sp
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