CHINA

NORTHERN GANSU PROVINCE

BEISHAN HILLS

QUARRY-3

BEISHAN LOCALITY

HONGYANJIANG FORMATION

EQUIVALENT TO THE CYNOGNATHUS ZONE

SPATHIAN STAGE

UPPERMOST SCYTHIAN EPOCH TO ANISIAN STAGE

LOWERMOST MID TRIASSIC EPOCH

EARLY TO MIDDLE TRIASSIC

STEM: TETRAPODA GOODRICH, 1930

SUPERCLASS: AMNIOTA HAECKEL, 1866

CLASS: REPTILIA LAURENTI, 1768

SUBCLASS: SYNAPSIDA OSBORN, 1903

SUPERORDER: THERASPIDA BROOM, 1905

GRANDORDER: EUTHERAPSIDA

MICRORDER: NEOTHERAPSIDA

ORDER: THERIODONTIA OWEN, 1881

EUTHERIODONTIA

SUBORDER: CYNODONTIA OWEN, 1860

EPICYNODONTIA HOPSON & KITCHING, 2001

INFRAORDER: EUCYNODONTIA

MAMMALIAMORPHA ROWE, 1988

Superfamily: TRITYLODONTIA Cope, 1884 (sensu Kuhne, 1943)

Family: TRIRACHODONTIDAE Crompton, 1955

Subfamily: SINOGNATHINAE Gao, Fox, Zhou, & Li, 2010

*Beishanodon youngi


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