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