Genus: Palatobaena GAFFNEY,1972
Etymology:

Species: bairdi GAFFNEY, 1972
Etymology:

Referred material:

BYRANT, 1990

Locality: Eastern Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

UCMP 129934: Skull and jaws.

 


Locality: Wyoming.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

Number: Not given:

 

GAFFNEY, 1972

Locality: Montana.

Horizon:

Biostratigraphy:

Age: Late Cretaceous.

Material:

FMN Pr 829: Anterior part of skull.

 


Locality: Bug Creek Anthills, SW 1/4, Sec. 9, T22N, R43E, McCone County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

MCZ 3515: Right maxilla.

 

LYSON, 2007

Locality: North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: 4 skulls and 2 shells.

 

STENERSON & O’CONNER, 1994

Locality: Northwestern South Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given:

____________________________________________________________________________________

Species: cohen LYSON & JOYCE, 2009
Etymology: In honor of Steven Cohen, an avid supporter of fossil turtles and the Marmarth Research Foundation.

Holotype: YPM 5798

Locality: Turtle Graveyard, Bucklin Township, near Marmarth, Slope County, North Dakota.

Note: More detailed information is available to qualifided persons upon request at MRF 0r YPM.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: A complete uncrushed skull, mandible, and shell.

Referred material:

MRF 257: Complete skull and mandible.

MRF 259: Complete skull.

MRF 263: Complete skull.

MRF 123: Shell missing part of carapace.

FMNH PR 829: Anterior part of skull.

UCM 37738: Skull and jaw fragments.

UCMP 114539: Fragmentary skull and jaws.

UCMP 131952: Fragmentary skull.

UCMP 131953: Skull.

UCMP 114539: Fragmentary skull and jaws.

AMNH 8277: Complete lower jaws.

Other referred specimens bases on equivalent stratigraphy:

UCMP 114680: Right and left jaw halves.

UCMP 114686: Left maxilla.

AMNH 2603: Nearly complete lower jaws.

MCZ 3515: Right maxilla.

UCMP 114644: Left maxilla.

UCMP 117154: Dentary.

UCMP 14656: Right quadrate.

UCMP 131701, 232702: Incomplete skulls.

UCMP 147458: Left mandible.

UCMP 172257: Left maxilla.

UCMP 129934: Dentary.

UCMP 259255: Fragmentary skull.

UCM 49229: Left dentary.

UCM 49230: Right and left dentary.

Note: All of these specimens were previously referred to Palatobaena bairdi (Gaffney, 1972, Archibald and Hutchison, 1979, Gaffney, 1982, Hutchison and Archibald, 1986, Holroyd and Hutichison, 2002, Hutchison and Holroyd, 2003).