Genus: Gilmoremys JOYCE, & LYSON, 2011
Etymology: In honor of Dr. Charles W. Gilmore, in acknowledgement of the important contribution to the field of fossil turtles research, and Greek, emys, "turtle."

Species: lancensis (GILMORE, 1916) JOYCE, & LYSON, 2011
= Aspideretes lancensis GILMORE, 1916
Etymology: In reference to the Lance Formation.

Holotype: USNM 6727

Locality: Niobrara County, Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian, Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Latest Cretaceous.

Material: A nearly complete carapace and an isolated hyoplastral fragment.

Referred material:

= Platypeltis memorialis HAY,

USNM 8087: Isolated left costal I.

Locality: Turtle Graveyard locality, Slope County, North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian, Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Latest Cretaceous.

Material:

MRF 275: Nearly complete skull.

MRF 277: Nearly complete skull.

MRF 309: Nearly complete skull and anteroposteriorly crushed skull.

MRF 467: A rigth hypoplastron.

MRF 516: A left hyoplastron.

MRF 525: Nearly complete carapace with minor damaged to the rib ends adn teh posteromedial portions of costals.

MRF 536: A left hypoplastron.

MRF 549: A right xiphiplastron.

MRF 565: A rigth hyoplastron.

MRF 758: Nearly complete skull.

MRF 759: Partial skull, associated jaw and articulated anterior cervical column.

MRF 575: A left xiphiplastron.

Locality: Unnumberd MRF locality, Slope County, North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian, Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Latest Cretaceous.

Material:

MRF 138: A near-complete carapace.

Locality: YPM Locality VP 07405, Fallon County, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian, Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Latest Cretaceous.

Material:

YPM 57324: Left hyoplastron, nuchal, and partial costal.

JOYCE, LYSON &WILLIAMS, 2016

Locality: Ninja Turtle locality, T1N, R55E, near the town of Ekalaka, Carter County, southwestrn Montana.

Horizon: Hell Cr eek Formation.

Biostratigraphy:

Age: L ancian, Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Latest Cretaceous.

Material:

BMRP 2013.4.214: Skull.

BMRP 2012.4.336. Skull.

BMRP 2013.4.240: A nuchal.

BMRP. 2013.4.241: A partial right hypoplastron.

BMRP 2013.4.239: Right xiphiplastron.

= Plastomenus costatus HAY, 1908

Locality: Garfield Couty, Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

Age: Lancian, Maastrichtian Stage, Upper Senonian Subepoch, Upper Gulf Epoch, Latest Cretaceous.

Material:

AMNH 6131: Approximately a dozen carapacial and plasral fragments.

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Species: gettyspherensis JOYCE, LYSON, & SERTICH, 2021
Etymology: In reference to the 'Gettyshpere,' a circle of positive energy that surrounded Mike Getty, finder of the type specimen and recently deceased paleontologist, preparator, friend, and human being extraordinaire. Though figurative, the Gettysphere was a place, and the species epithet is therefore formed with the ending '-ensis.'

Holoytpe: DMNH EPV.125905

Locality: DMNH locality 5812, North Escavada Study Area, San Juan County, New Mexico.

Horizon: Fossil Forest Member, Fruitland Formation.

Biostratigraphy:

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

Material: A partial, disarticulated shell consisting of right costals I-III, V, VI, and VIII, left costals V, VII, and VIII, the left half of the entoplastron, the right hypo- and xiphiplastron, the left hyo-, hypo-, and xiphiplastron.

Referred material:

TITUS, KNOLL, SERTICH, YAMAMURA, SUAREZ, GLASSPOOL, GINOUVES, LUKACIC & ROBERTS, 2021

Locality: Rainbows and Unicorns Quarry (RUQ), Kaiparowits Plateau area, Grqnd Staircase-Escalante National Mounument, Kane County, Utah.

Horizon: Middle Member, Kaiparowits Formation.

Biostratigraphy:

Age: Judithian age, Late Campanian Stage, Senonian Subepoch, Gulf Epoch, Late Cretaceous.

Material:

Numbers: Not given:

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