BRISTOL

CARREFORU SITE

WESTBURY FORMATIOIN

PENARTH GROUP

RHAETIAN STAGE

LATEST LATE TRIASSIC EPOCH

LATE TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

INFRACLASS: NEODIAPSIDA BENTON, 1985

ORDER: THALATTOSAURIA MERRIAM, 1904

Family: PACHYSTROPHEIDAE Kuhn, 1961

Pachystropheus rhaeticus
= Rysosteus oweni

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