Round Mountain Quarry (Miocene of the United States)

Where: Rio Arriba County, New Mexico (36.5° N, 107.0° W: paleocoordinates 37.0° N, 104.5° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: referred Chamita Formation, Late/Upper Clarendonian (13.6 - 10.3 Ma)

• said to be late Clarendonian

Environment/lithology: terrestrial

Primary reference: R. H. Tedford and S. F. Barghoorn. 1993. Road Log Neogene geology of the EspaƱola Basin, New Mexico. New Mexico Museum of Natural History Bulletin 2:169-178 [J. Alroy/J. Alroy/M. Uhen]more details

PaleoDB collection 19528: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• see also Tedford 1981
the "Santa Clara-Battleship Mountain" fauna apparently spans the "late late Barstovian" to "earliest Hemphillian" interval and hence is omitted
probably includes the "10.7 +/- 0.7 Ma" material of Latorre et al. 1997
Mammalia
 Carnivora - Canidae
Aelurodon cf. taxoides1 Hatcher 1894 bone-crushing dog
Epicyon cf. saevus1 Leidy 1858 bone-crushing dog
Leptocyon vafer6 Leidy 1858 canine
Leptocyon matthewi6 Tedford et al. 2009 canine
 Perissodactyla - Equidae
Megahippus cf. matthewi Barbour 1914 anchitheriine horse
Pliohippus sp. Marsh 1874 horse
small
Pliohippus cf. pernix Marsh 1874 horse
Cormohipparion occidentale4 Leidy 1856 hipparionine horse
Supplemental Table S1
Pseudhipparion gratum1 Leidy 1869 hipparionine horse
 Perissodactyla - Rhinocerotidae
Teleoceras brachyrhinum5 Prothero 2005 rhinoceros
 Artiodactyla - Camelidae
Michenia sp.3 Frick and Taylor 1971 camel
a "similar taxon" to Michenia yavapaiensis; not clear why this is omitted by Tedford and Barghoorn; probably includes "M. cf. browni" of Latorre et al. 1997
Hemiauchenia sp. Gervais and Ameghino 1880 camel
 Artiodactyla - Gelocidae
"Pseudoceras klausi n. sp." = Floridameryx klausi2
"Pseudoceras klausi n. sp." = Floridameryx klausi2 Frick 1937 ruminant
 Artiodactyla - Antilocapridae
Ramoceros marthae1, "Cosoryx cerroensis n. sp." = Cosoryx (Subcosoryx) cerroensis
Ramoceros marthae1 Frick 1937 pronghorn
"Cosoryx cerroensis n. sp." = Cosoryx (Subcosoryx) cerroensis Frick 1937 pronghorn
see Frick 1937: "C. sp." of Tedford 1981