Neighbourhood of Chaco CaƱon Hoplochelys crassa (Chelydra crassa) type locality (Paleocene to of the United States)

Where: San Juan County, New Mexico (36.1° N, 108.0° W: paleocoordinates 42.7° N, 88.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Nacimiento Formation, Torrejonian to Torrejonian (63.3 - 63.3 Ma)

• Both the Puerco and the Torrejon are found in that region and it is therefore uncertain to which of these the fossil belongs

• member-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

• none given

Size class: macrofossils

Collected by David Baldwin in 6 1883; reposited in the AMNH

• collected for E. D. Cope

Primary reference: O. P. Hay. 1908. The fossil turtles of North America. Carnegie Institution of Washington Publication 75:1-568 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 131857: authorized by Roger Benson, entered by Roger Benson on 31.07.2012, edited by Evangelos Vlachos

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Testudines - Trionychidae
Trionyx sp.1 Geoffroy Saint-Hilaire 1809 softshell turtle
 Testudines -
Compsemys sp.1 Leidy 1856 turtle
 Testudines - Kinosternoidea
"Chelydra crassa n. sp." = Hoplochelys crassa1
"Chelydra crassa n. sp." = Hoplochelys crassa1 Cope 1888 mud turtle
Cope states that he possest remains of 2 individuals. Of the first there were present 2 vertebral bones, 9 peripherals, and 3 plastrals; of the second, 3 vertebrals. The bones of the first-mentioned individual are now in the American Museum of Natural History and bear the catalog number 6091; where the remains of the second specimen are is not at present known
 Testudines - Pantrionychidae
Plastomenus ? communis1, Platypeltis antiqua n. sp.2, "Plastomenus acupictus n. sp." = Hutchemys acupictus2
Plastomenus ? communis1 Cope 1875 turtle
Platypeltis antiqua n. sp.2 Hay 1907 turtle
"Plastomenus acupictus n. sp." = Hutchemys acupictus2 Hay 1907 turtle
 Testudines - Panemydidae
Emys sp.1 Dumeril 1806 pond turtle