NORTHEAST JAPAN

YOROIJIMA ISLAND

KITAKAMI MASSIF

NORTHEASTERN CORNER OF MIYAGI PREFECTURE

COAST OF MINAMISANRIKU TOWN

OSAWA FORMATION

SPATHIAN IN STAGE

UPPER SCYTHIAN EPOCH

LATE EARLY TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1903

INFRACLASS: NEODIAPSIDA BENTON, 1985

NEODIAPSIDA: INCERTAE SEDIS

OR AMNIOTA: INCERTAE SEDIS

MAGANORDER: ICHTHYOPTERYGIA BAUR, 1887 emend nova

Incertae sedis

Gen. sp indet.

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NORTHEAST JAPAN

YOROIJIMA ISLAND

KITAKAMI MASSIF

MIYAGI PREFECTURE

MOTOYOSHI-GUN

UTATSU-CHO

COAST OF TATEZAKI

OSAWA FORMATION

SPATHIAN IN STAGE

UPPER SCYTHIAN EPOCH

LATE EARLY TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1903

INFRACLASS: NEODIAPSIDA BENTON, 1985

NEODIAPSIDA: INCERTAE SEDIS

OR AMNIOTA: INCERTAE SEDIS

MAGANORDER: ICHTHYOPTERYGIA BAUR, 1887 emend nova

SUPERORDER: EOICHTHYOSAURIA MOTANI, 1999

Family: UTATSUSAURIDAE McGowan & Montani, 2003

*Utatsusaurus hataii
= Grippia hataii

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JAPAN

YORON-IJIMA ISLAND

MIYANGI PREFECTURE

OGATSU

20 KM SOUTH OF THE TYPE LOCALITY

OSAWA FORMATION

SPATHIAN IN STAGE

UPPER SCYTHIAN EPOCH

LATE EARLY TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1903

INFRACLASS: NEODIAPSIDA BENTON, 1985

NEODIAPSIDA: INCERTAE SEDIS

OR AMNIOTA: INCERTAE SEDIS

MAGANORDER: ICHTHYOPTERYGIA BAUR, 1887 emend nova

SUPERORDER: EOICHTHYOSAURIA MOTANI, 1999

Family: UTATSUSAURIDAE McGowan & Montani, 2003

Utatsusaurus hataii
= Grippia hataii