Species: elegans KHOSATZKY & MLYNARSKI, 1971
Etymology: Latin, elegans, "elegant."

Holotype: ZIN No. RN. T/M-46.1

Locality: Nemegt, Nemegt basin, Ömnögov (South Gobi), Mongolia.

Horizon: Nemegt Formation.

Biostratigraphy: Tarbosaurus bataar, Saurolophus angusitrostris and Dyplosaurus giganteus zone.

Age: Lower Maastrichtian Stage, Uppermost Senonian, Uppermost Gulf Epoch, Late Cretaceous.

Material: Complete shell.

Referred material:

Z. Pal. No. MgCh/21: Shell.

Z. Pal. No. MgCh/27: Nearly complete skull.

Z. Pal. No. MgCh/57: Fragmentary plastron.

Also known from, Tsagan Khushu, Nemegt Basin and Bugin Tsav, Western Gobi.

MLYNARSKI & NARMANDACH

Locality: Nemegt, Nemegt Basin, Ömnögov (South Gobi), Mongolia.

Horizon: Upper Nemegt Formation.

Biostratigraphy:

Age: Lower Maastrichtian Stage, Uppermost Senonian, Uppermost Gulf Epoch, Late Cretaceous.

Material:

ZPal.No.MgCh/74: An almost complete although deformed carapace together with a posterior part of plasteron of a large individual.

ZPal.No.MgCh/75: Carapace without a neck ridge.

ZPal.No.MgCh/79: Anterior cranial part of carapace and part of an anterior lobe of plasteron.

ZPal.No.MgCh/82a: 13 shell fragments of a few individuals varying in
size.

ZPal.No.MgCh/87: 7 fragments of carapace.

 

Locality: Bugin Tsav Locality, Ömnögov Aimag, Mongolia.

Horizon: Nemegt Formation.

Biostratigraphy:

Age: Lower Maastrichtian Stage, Uppermost Senonian, Uppermost Gulf Epoch, Late Cretaceous.

Material:

IGM 90/11: Partial skull and lower jaw, complete carapace and plastron, left tibia, left fibula, right humerus, and right femur from a single individual.

IGM 90/27: Partial articulated shell.

IGM 90/30: Articulated shell.

IGM 90/22-23: 2 associated articulated shells.

IGM 90/31: Nearly complete plastron.

IGM 90/41: Complete right hyoplastron.

IGM 90/51: Complete carapace.

IGM 90/54: Partially preserved carapace.

IGM 90/55: Partial skull preserving most of the pterygoid and partial regions.

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Species: turfanensis YEH, 1974 (Type Paleocene)
Etymology:

Referred material:

Locality: Turpan, southeast of the Tienshan mountains, Xinjiang Province, China.

Horizon: Subashi (Supushih) Formation.

Biostratigraphy:

Age: Maastrichtian Stage, Uppermost Senonian, Uppermost Gulf Epoch, Late Cretaceous.

Material:

IVPP V 4240: An anterior 4 5th carapace and plasteron.

IVPP V 4241: A complete plastron.

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Species: occidentalis NESOV & KRASSOVSKAYA, 1984
Etymology:

Holotype:

Locality:

Horizon:

Biostratigraphy:

Age:

Material:

Referred material:

= Mongolemys cf. occidentails NESOV, 1984

Number: Not given.

Locality: Chodzhakul Lake Locality, western Sultanuvais Ridge, Uzbekistan.

Horizon: Lower or middle Chodzhakul Formation.

Biostratigraphy:

Age: Upper Albian Stage, Uppermost Gallic Subepoch, Uppermost Early Cretaceous Epoch, Early Cretaceous.

Material: