Turtle Ridge locality (Cretaceous of the United States)

Where: Slope County, North Dakota (46.3° N, 104.0° W: paleocoordinates 52.6° N, 77.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Hell Creek Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Hell Creek Formation, Late Cretaceous (Maastrichtian)

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Collected by Marmarth Research Foundation in 1997-2011

Collection methods: quarrying, surface (in situ),

• MRF, Marmarth Research Foundation, Marmarth, North Dakota, U.S.A.

Primary reference: N. S. Vitek. 2012. Giant fossil soft-shelled turtles of North America. Palaeontologia Electronica 15(1):13A [R. Benson/R. Benson/O. Alfaro]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 141582: authorized by Roger Benson, entered by Roger Benson on 29.03.2013, edited by Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Testudinata - Baenidae
Baenidae indet.1, Saxochelys gilberti n. gen. n. sp.2
Baenidae indet.1 Cope 1882 turtle
new species
Saxochelys gilberti n. gen. n. sp.2 Lyson et al. 2019 turtle
DMNH EPV.96000, an articulated skull, mandible, and hyoid apparatus
 Testudines - Pantrionychidae
Gilmoremys lancensis1
Gilmoremys lancensis1 Gilmore 1916 turtle
DMNH 98785
 Testudines - Chelydridae
cf. Chelydridae indet.1
cf. Chelydridae indet.1 Swainson 1839 turtle
DMNH 130940
 Testudines - Trionychidae
"Trionyx" beecheri1, Axestemys infernalis1
"Trionyx" beecheri1 Hay 1904 softshell turtle
provisionally
Axestemys infernalis1 Joyce et al. 2019 softshell turtle
MRF 266, skull
1Joyce et al. 2019; 2Lyson et al. 2019