Genus: Chelosphargis ZANGERL, 1953
Etymology:

Species: advena (HAY, 1908) ZANGERL, 1953
Etymology:
= Protostega advena HAY, 1908

Holotype: KU (VP) 1209

Locality: Either from between Bogue and Hill City, or from Gove County, Kansas.

Horizon: Niobrara Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material: Fragmentary shell.

Referred material:

FMNM PR121:

FMNM PR126: 2 Peripheral bones.

 

Locality: Martin's Canyon, Kansas.

Horizon: Niobrara Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material:

KU (VP) 1258: Posterior end of the carapace and the middle part of the carapical disk.

 


Locality: Southeast corner of Lance County, north of Ira King's Ranch, south of Smoky River, Kansas.

Horizon: Niobrara Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material:

YPM 3601: Fragmentary shell and skeleton.

 

Locality: Gove County, Kansas.

Horizon: Niobrara Formation.

Biostratigraphy:

Age: Late Cretaceous.

Material:

YPM 3603: Eleventh peripheral in sutural contact with the pygal and the suprapygal and a small piece belonging to the posterior part of the braincase.

 

Locality: Locality unknown.

Horizon: Niobrara Formation?

Biostratigraphy:

Age: Late Cretaceous.

Material:

KU (VP) 1219: Nearly complete skull and lower jaw, anterior end of the plastron, along with large portions of the carapace and posterior parts of the plastron.

AMNH 1975, FMNH UR26: Humerii.

FMHM UR25: 2 peripheral bones.

FMHM UR84: A fragmentary specimen.

 

HOOK, 1998

KUVP 1219, AMNH 1778, FMNH P27397, P27485, PR 171, UR26, UR177, YPM 3603:

 

SCHWIMMER, 2010

Locality: Dallas County, Alabama.

Horizon: Mooreville Fromation.

Biostratigraphy:

Age: Campanian Stage, Senoniain Subepoch, Gulf Epoch, Late Cretaceous.

Material:

SUMP 2259: Xiphiplastron with tooth marks from Deinosuchus.