ITALY
VIANO
RHAETIAN STAGE
UPPERMOST LATE TRIASSIC EPOCH
LATE TRIASSIC
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA OSBORN, 1904
INFRACLASS: EURYAPSIDA COLBERT, 1945
SUPERORDER: SAUROPTERYGIA OWEN 1860
OR NEODIAPSIDA: INCERTAE SEDIS
ORDER: PLACODONTIA MEYER, 1863
SUBORDER: CYMODONTOIDEA NOPCSA, 1923
Superfamily: PLACOCHELYIDA Jaekel, 1907 (sensu Romer, 1956)
Family: PLACOCHELYIDAE Jaekel, 1907
Psephoderma anglicum
_____________________________________________________________________________________