EGYPT
SINAI PENINSULA
ARAIF EN NAQA
LOWER CERATITES BEDS
ANISIAN STAGE
LOWER MID TRIASSIC EPOCH
MIDDLE TRIASSIC
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1903
NEODIAPSIDA: BENTON, 1985
LEPIDOSAUROMORPHA: BENTON 1985
SUPERORDER: SAUROPTERYGIA OWEN 1860
OR NEODIAPSIDA: INCERTAE SEDIS
ORDER: PLACODONTIA MEYER, 1863
SUBORDER: CYMODONTOIDEA NOPCSA, 1923
Superfamily: PLACOCHELYIDA Romer, 1956
Family: PLACOCHELYIDAE Jaekel, 1907
*Psephosauriscus sinaiticus
= Psephosaurus ? sinaiticus
CF. *Psephosauriscus rhombifer
= Psephosaurus (?) rhombifer
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