ARIZONA
COCONINO COUNTY
NORTHEAST SIDE OF THE LITTLE COLORADO RIVER ABOUT 50 MILES NORTH AND A LITTLE EAST OF FLAGSTAFF
2 MILES EAST OF TANNER'S CROSSING
PAINTED DESERT MEMBER
PETRIFIED FOREST FORMATION
EARLY-MIDDLE NORIAN STAGE
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: RUTIODONTINAE Long & Murry, 1995
*Rutiodon validus
= Machaeroprosopus validus
= Clepsysaurus validus
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