Species: hui YOUNG, 1958
Etymology:

Holotype: IVPP V952

Locality: Dingy (Xingyi), Guizhou Province, China.
Or Langmu, Tachai Village, Tingshiao, Shingyi Hsien, SW Keichow Province, China.

Horizon: Zhuganpo Formation.

Biostratigraphy:

Age: Carnian Stage, Lower Late Triassic Epoch, Early Late Triassic.
Note: Originally thought to belong to the Guanlin Formation, Ansian as per RIEPPEL, 2000.

Material: Skull and cervical vertebrae.

Referred material:

V953: Right part of the trunk with the anterior part of the tail and the right limbs of a young individual.

V956a: Part of the neck, anterior body and the left limb of a juvenile.

V956b: Skull and skeleton of a juvenile.

V956c: Nearly complete cervical and dorsal vertebrae with pectoral girdle.

V954: Posterior part of body and limbs and anterior part of the tail.

V955: Nearly complete skeleton with skull.

Vm001: Posterior dorsals and part of the caudal vertebrae and limbs.

Vm002: Skull and skeleton of a juvenile.

Vm003: Skull and fragmentary skeleton.

Vm004: Fragmentary remains of a juvenile.

Vm0012: Unprepared specimen, most of the skeleton of a juvenile.

Vm0013: Negative impression.

Vm0014: Fragmentary remains of a juvenile.

Vm0025: Skull and skeleton missing caudal series of a juvenile.

CHENG, WU & LI, 2004

NMNS-cyn2202-01: Complete specimen.
Note: Has to embryos on each side.

NMNS-VL191: Complete speimen.
Note: Has at least three crushed embryos on each side.

LI & RIEPPEL, 1998

IVPP V7919: A young specimen in ventral view missing only the tip of the tail.

IVPP V7917: A virtually complete young individual.

GXD7601: A nearly complete young individual.

GXD7621: A well-preserved adult in dorsal view.

HOLMES, CHENG & WU, 2008

NMNS-CYN-2003 -05, -12: Skulls and skeletons.

CHENG, HOLMES, WU, AND ALFONSO, 2009, XUE, JIANG, MONTONI, RIEPPEL, SUN, SUN, JI, & YANG, 2015

Males

NMNS-chw-03, NMNS-cyn 2002-04, -08, -10, -11, -12, -14, NMNS-cyn 2003-15, -17, -18, -20, -22, -25, -27, NMNS-cyn 2005-01, -03, -08 to -12, -23, -25, -28 to -30, NMNS-kiko 2004-01, NMNS-kiko 2005-XX, NMNS-000933-F0034394, 30-R39, 32?-R1, 34-R10, 34-R11, 34-R13, BPV601, GMPKU-P-1154 (1), -1976, -977, -1992, GXD-7621, V7918, V7919: Nearly complete specimens.

GXD7613: An adult missing the skull and 6 or 7 cervicals and tip of the tail.

GXD838028: A fully-grown individual in ventral view.

Females

NMNS-chw-01, 02, -04, NMNS-cyn 2002-01, 02, -03, -05 to -07, -13, NMNS-cyn 2003-16, -19, -21, -23, -24, -26, NMNS-cyn 2005-02,-04 to -07, -11, -13 to -22, -24 to -27, -31, -32, NMNH-kiko2004-03, NMNS-kiko 2005-X, -Y, -YY, NMNS-VL-191, 28-R5, 30-R40, 31-R17, 31-R7, 34-R12, 35-R38, 35-R39, 35-R40, GMPKU-P-1061,-1074, -1973, -1982, -1990, -3012a, -3012b, -3012c, -3013, V7917, V953: Nearly complete specimens.

GXD7602: A young individual exposed in dorsal view.

GXD7603: Nearly complete specimen.

GXD835002: An embryo in dorsal view.

YOUNG, 1965

Locality: Tingchiao, Shingyi, Kweichou Province, China.

Horizon:

Biostratigraphy:

Age: Middle Triassic.

Material:

College of Geology, Peking, St. V004: Skull.

College of Geology, Peking, St. V0019: Posterior portion of skull.

College of Geology, Peking, St. 1009: Fragmentary skeleton of a juvenile.

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Species: yuananensis YOUNG, 1965
Etymology:

Holotype: IVPP V 2799

Locality: Wangchenkang, North West of Yuananhsien, Hupeh Province, China.

Horizon: Jialingjiang Formation.

Biostratigraphy:

Age: Olenekian, Upper Spathian Stage, Upper Scythian Epoch, Early Triassic

Material: Skeleton missing cervical and caudal vertebrae.
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Species: lusiensis GONZUI, 1978
Etymology:

Holotype:

Locality:

Horizon:

Biostratigraphy:

Age:

Material: Fragmentary skeleton.