NORTHWESTERN KANSU (GANSU) PROVINCE
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: AMPHIBIA LINNAEUS, 1758
SUBCLASS: LABYRINTHODONTIA OWEN, 1860
SUPERORDER: TEMNOSPONDYLIA ZITTEL, 1887
MICROORDER: EUSKELIA YATES & WARREN, 2000
ORDER: EYROPODIA
Superfamily: DISSOROPHOIDEA Boulenger, 1902 (sensu Bolt, 1969)
Family: BRANCHIOSAURIDAE Fritsch, 1883
Genus: Nova
SUBCLASS: LEPOSPONDYLI ZITTEL, 1888
ORDER: MICROSAURIA DAWSON, 1863
Genus: Nova (2 genera)
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
Genus: Nova
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