Species: belviderensis (CRAGIN, 1894)
Etymology:
= Plesiochelys belviderensis CRAGIN, 1894

Holotype: Colorado College, Colorado Springs, El Paso County, Colorado.

Locality: 1/2 mile south of the railway station at Belvidere, Kiowa County, Kansas.

Horizon: Kiowa Shales.

Biostratigraphy:

Age: Comanchean, Lower Cashenranchian age, Early to Middle Albian Stage, Middle Gallic subepoch, upper Early Cretaceous Epoch, Early Cretaceous.

Material: 4 costals and 1 neural.
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Species: pervicax HAY, 1908
Etymology:

Holotype: AMNH 1018

Locality: Brush Creek, 10 miles east of Pryor, Yellowstone County, Montana.

Horizon: Sykes Mountain Formation or Thermopolis Shales.

Biostratigraphy:

Age: Late Jurassic.

Material: A poorly preserved carapace and plasteron.

Referred material:

OSTROM 1970

Locality: YPM 62-11, NE 1/4, Sec. 1, T 54N, R 95W, 2.5 miles WSW of Himes, Big Horn County, Wyoming.

Horizon: Cloverly Formation.

Biostratigraphy:

Age: Cashenranchian, Aptian-Albian Stage, middle Gallic subepoch, lower Cretaceous Epoch, Early Cretaceous.

Material:

YPM 4889: Incomplete plastron and carapace.

YPM 4891: Incomplete plastron and carapace.

 

Locality: NE 1/4, Sec 1, T. 54 N, R 95 W, 2.5 miles WSW of Himes, Big Horn County, Wyoming.

Horizon: Cloverly Formation.

Biostratigraphy:

Age: Cashenranchian, Aptian-Albian Stage, middle Gallic subepoch, lower Cretaceous Epoch, Early Cretaceous.
Material:

YPM 4894: Incomplete plastron and carapace.

YPM 5282: Incomplete plastron and carapace.

 

Locality: YPM 66-3, NW 1/4 Sec. 17, T 49N, R 89W, 2 miles SE of Hyattville, Big Horn County, Wyoming.

Horizon: Cloverly Formation.

Biostratigraphy:

Age: Cashenranchian, Aptian-Albian Stage, middle Gallic subepoch, lower Cretaceous Epoch, Early Cretaceous.

Material:

YPM 5435: Incomplete plastron and carapace.

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Species: caelatus HAY, 1908
Etymology:

Holotype: AMNH 5800

Locality: USNM locality 41614 (Muirkirk site), Dinosaur Park, Price Georges County, Maryland.

Horizon: Arundel Formation, Potomac Group.

Biostratigraphy:

Age: Upper Aptian-Lower Albian Stage, Middle Gallic Subepoch, Upper Early Cretaceous Epoch, Early Cretaceous.

Material: 1st right costal and 1st second right peripherals.

Referred material:

FREDERICKSON, LIPKA & CIFELLI, 2018

USNM 497784: 17 carapace fragments probably pertaining to a single individual.

KRANZ, 1998

USNM: Fragmentary scutes.

USNM 466063: Scutes.
Note: May belong to a different genus.

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Species: depressus HAY, 1908
Etymology:

Holotype: AMNH 5731

Locality: Unknown.

Horizon: Denver Beds?

Biostratigraphy:

Age:

Material: Poorly preserved shell lacking most of the surface and edges.