ARIZONA

GUADALUPE COUNTY

NEAR SANTA ROSA

LITTLE COLORADO RIVER

BULL CANYON FORMATION

REVUELTIAN

EARLY NORIAN SUBSTAGE

EARLY NORIAN EPOCH

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

SUPERCOHORT: CRUROTARSI SERENO & ARCUCCI, 1990

COHORT: CROCODYLOTARSI BENTON & CLARK, 1988

SUPERORDER: PARASUCHIMORPHA NOVA

ORDER: PARASUCHIA HUXLEY, 1875

Family: ANGISTORHINIDAE Huene, 1936

Subfamily: PSEUDOPALATINAE, Long & Murry, 1995

Pseudopalatus buceros
= *Rutiodon andersoni
= Machaeroprosopus andersoni