Almagre Arroyo (Cope) (Eocene of the United States)

Also known as Arroyo Almagre; Gallinas Creek

Where: Rio Arriba County, New Mexico (36.5° N, 107.0° W: paleocoordinates 41.2° N, 91.7° W)

• coordinate based on political unit

When: San Jose Formation, Wasatchian (55.8 - 50.3 Ma)

Environment/lithology: terrestrial

Primary reference: G. G. Simpson. 1951. Hayden, Cope, and the Eocene of New Mexico. Proceedings of the Academy of Natural Sciences, Philadelphia 103:1-21 [J. Alroy/J. Alroy/M. Carrano]more details

PaleoDB collection 15430: authorized by John Alroy, entered by John Alroy on 05.01.1995, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• records from Simpson 1951 pertain to a list reproduced from Cope's diaries; most of Cope's collection is from the south fork of the arroyo, i.e., near AMNH Quarry 51
vicinity of multiple localities: see Lucas et al. 1981
Williamson and Lucas 1992a report Meniscotherium tapiacitum from NMMNH Loc. 241, which is on the divide between Almagre Arroyo and Arroyo Blanco
possibly relevant record: Diacodon alticuspis Novacek 1982: "Ojo Almagre Quarry"
"Bathmodon sulcidens" Simpson 1951: species not mentioned by Uhen and Gingerich 1995
Mammalia
 Primates - Notharctidae
Copelemur tutus n. sp.3 Cope 1877 primate
provenance questionable
Cantius angulatus1 Cope 1875 primate
Cantius frugivorus1 Cope 1875 primate
 Cimolesta - Coryphodontidae
Coryphodon armatus1 Cope 1872 pantodont
 Perissodactyla - Equidae
Xenicohippus osborni2 Bown and Kihm 1981 horse
Eohippus angustidens2 Cope 1875 horse
 Ferae -
Creodonta indet.1 Cope 1875 creodont
Creodonta indet.1 Cope 1875 creodont
 Taeniodonta - Stylinodontidae
Ectoganus gliriformis4 Cope 1874 taeniodont
includes type of "Calamodon arcamaenus" and probably "C. ?simplex"; see Simpson 1951
 Trogontia - Esthonychidae
Esthonyx bisulcatus1 Cope 1874 tillodont
 Ungulata - Hyopsodontidae
Hyopsodus sp.1 Leidy 1870 condylarth
 Ungulata - Phenacodontidae
Meniscotherium chamense Cope 1874 condylarth
also present at NMMNH Loc. 242, see Williamson and Lucas 1992a