EASTERN ASIA RUSSIA

RUSSKII ISLAND

SOUTHERN PRIMORYE

MIDDLE PART OF THE KARAZIN FORMATION

ACROCHORDICERAS KIPARISOVAE ZONE

MIDDLE ANISIAN STAGE

LOWER MID TRIASSIC EPOCH

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: DIAPSIDA OSBORN, 1904

INFRACLASS: NEODIAPSIDA BENTON, 1985

NEODIAPSIDA: INCERTAE SEDIS

OR AMNIOTA: INCERTAE SEDIS

MAGANORDER: ICHTHYOPTERYGIA BAUR, 1887 emend nova

SUPERORDER: EOICHTHYOSAURIA MOTANI, 1999

GRANDORDER: ICHTHYOSAURIA EMEND BLAINVILLE, 1835

MICRORDER: HUENEOSAURIA MAISCH & MATZKE, 2000

ORDER: MIXOSAUROIDEA (BAUR, 1887)

Family: MIXOSAURIDAE Baur, 1887

Subfamily: MIXOSAURINAE Baur, 1887 nom. Transl. Ex MIXOSAURIDAE

Tholodus cf schmidi

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