Genus: Saxochelys LYSON, SAYER & JOYCE, 2019 (published 2020)
Etymology:

Species: gilberti LYSON, SAYER & JOYCE, 2019 (published 2020)
Etymology:

Holotype: DMNH EPV.96000

Locality: DMNH Loc. 6302 (Turtle Ridge Locality), northwest of Marmarth, Buckling Townshipe, Slope County, North Dakota.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material: An articulated skull, mandible, and hyoid apparatus.

Referred material:

DMNH EPV.96903: Two-thirds of shell.

DMNH EPV.96905: Well-preserved carapace with medial sutures and sulci clearly visible and nearly complete plastron, altough sutures and sulci are obscured.

DMNH EPV.96907: Partially complete carapace and plastron.

DMNH EPV.96903: Two-thirds of a shell.

DMNH EPV.96908: Shell.

DMNH EPV.96909: Carapace.

DMNH EPV.96910: Shell.

DMNH EPV.97026: Carapace and plastron fragments.

DMNH EPV.97029: Skeleton with distorted skull and articulated lower jaw, isolated cervical vertebrae, complete shell, 13 articulated caudal vertebrae, both humeri, and both hind limbs and let pes.

DMNH EPV.97030: Nearly complete plastron.

DMNH EPV.97031: Carapace and plastron fragments.

DMNH EPV.97033: Skull roof, and mostly complete shell.

DMNH EPV.97034: Skull roof.

DMNH EPV.97035: Left plastron and hypoplastron.

DMNH EPV.97041: A near complete skull, missing part of posterior ventral portion on the right side, with some crushing.

DMNH EPV.97042: A mostly complete shell.

DMNH EPV.97043: Shell.

DMNH EPV.97044: Shell.

DMNH EPV.97046: Shell.

DMNH EPV.97047: Shell.

DMNH EPV.97049: Posterior half of carapace with well-preserved in situ left hind limb and tail.

DMNH EPV.97066: Partial in situ shell.

DMNH EPV.97067: Complete in situ shell.

DMNH EPV.97068: Complete in situ shell.

DMNH EPV.97069: Complete in situ shell.

DMNH EPV.97070: In situe shell and associate manus.

DMNH EPV.97071: Complete shell in situ.

DMNH EPV.98789: Plastron.

DMNH EPV.98812: Complete carapce and plastron with sutures and sulci.

DMNH EPV.98816: Nearly complete mandible, missing part of the dorsal portion of the right side.

DMNH EPV.98820: Shell fragments.

DMNH EPV.98828: Partial shell.

DMNH EPV.98829: Anterior half of plastron.

DMNH EPV.98830: Shell fragments.

DMNH EPV.98849: Shell fragments.

DMNH EPV.98850: Skull roof.

DMNH EPV.98851: Plastron fragment.

DMNH EPV.98857: Plastron with carapace fragments.

DMNH EPV.98861: A complete mandible.

DMNH EPV.130939: An almost complete skull.

DMNH EPV.130969: Plastron elements.

DMNH EPV.14014.02: Skeleton with complete shell and skull, as well as a partial caudal series, forelimb, and hindlimb.