PBDB Collection

Chama-El Rito (Miocene of the United States)

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

• Paleocoordinates: 40.1° N, 101.2° W (Wright 2013)

• coordinate based on political unit

When: upper Chama-El Rito Member (Tesuque Formation), Barstovian (16.3 - 12.5 Ma)

Environment/lithology: terrestrial

Primary reference: R. H. Tedford. 1981. Mammalian biochronology of the late Cenozoic basins of New Mexico. Geological Society America Bulletin 92 [J. Alroy/J. Alroy/J. Ju]more details

PaleoDB collection 19287: authorized by John Alroy, entered by John Alroy on 30.04.1994, edited by Jonathan Marcot

Creative Commons license: CC0 (CC0)

Taxonomic list

• includes Conical Hill Quarry, a.k.a. CHQ; not clear from discussion of Tedford 1981 or Tedford and Barghoorn 1993 whether the main Chama-El Rito fauna is significantly older than that of CHQ
referred sediments of the Chama-El Rito Mbr. are dated at 10.3 +/- 0.3 and 10.57 +/- 0.26 Ma KA by Dethier et al. 1986; average is 10.44 Ma; however, these dates appear to be much younger than the fauna itself
not the same as El Rito

Show authors, comments, and common names

Mammalia
Rodentia - Mylagaulidae	Notogaulus minor² Notogaulus minor² Korth 2013 rodent "Conical Hill Quarry"
Rodentia - Castoridae	"Eucastor cf. planus" = Nothodipoides planus⁶, Eucastor cf. tortus⁶ "Eucastor cf. planus" = Nothodipoides planus⁶ Stirton 1935 beaver CHQ Eucastor cf. tortus⁶ Leidy 1858 beaver
Tribosphenida - Erinaceidae	Metechinus amplior⁵, Untermannerix copiosus⁵ Metechinus amplior⁵ Rich 1981 hedgehog Conical Hill Quarry Untermannerix copiosus⁵ Rich 1981 hedgehog
Carnivora - Canidae	Aelurodon ferox⁶, Paratomarctus temerarius⁷, Carpocyon webbi⁷ Aelurodon ferox⁶ Leidy 1858 bone-crushing dog Paratomarctus temerarius⁷ Leidy 1858 bone-crushing dog CHQ; also "Middle of Ojo Caliente locality" Carpocyon webbi⁷ Wang et al. 1999 bone-crushing dog
Perissodactyla - Rhinocerotidae	Aphelops megalodus⁴, Peraceras profectum⁴ Aphelops megalodus⁴ Cope 1873 rhinoceros "Conical Hill Quarry" Peraceras profectum⁴ Matthew 1899 rhinoceros "Conical Hill Quarry", "District #1", and "Chama-el-Rito"
Perissodactyla - Equidae	Hypohippus cf. affinis⁶, "Merychippus" sp., "Merychippus" coloradense³, Protohippus sp.⁶, Pliohippus sp.⁶ Hypohippus cf. affinis⁶ Leidy 1858 anchitheriine horse CHQ "Merychippus" sp. Leidy 1856 horse CHQ: "C." sphenodus of MacFadden 1984b "Merychippus" coloradense³ Osborn 1918 horse Protohippus sp.⁶ Leidy 1858 horse CHQ Pliohippus sp.⁶ Marsh 1874 horse CHQ
Artiodactyla - Camelidae	Aepycamelus sp.⁶, Protolabis sp.⁶, Michenia sp.⁶ Aepycamelus sp.⁶ Macdonald 1956 camel Protolabis sp.⁶ Cope 1876 camel Michenia sp.⁶ Frick and Taylor 1971 camel
Artiodactyla - Merycoidodontidae	"Merychyus medius" = Ustatochoerus medius¹ "Merychyus medius" = Ustatochoerus medius¹ Leidy 1858 oreodont
Artiodactyla - Antilocapridae	Ramoceros ramosus Ramoceros ramosus Cope 1874 pronghorn
Artiodactyla - Moschidae	"Longirostromeryx blicki" = Longirostromeryx wellsi⁶, "Blastomeryx francesca" = Blastomeryx gemmifer⁶ "Longirostromeryx blicki" = Longirostromeryx wellsi⁶ Matthew 1904 musk deer "Blastomeryx francesca" = Blastomeryx gemmifer⁶ Cope 1874 musk deer
Artiodactyla - Dromomerycidae	Cranioceras teres⁶ Cranioceras teres⁶ Cope 1874 ruminant
Proboscidea - Mammutidae	Gomphotherium obscurum¹ Gomphotherium obscurum¹ Leidy 1869 mastodon

¹Alroy 2002; ²Korth 2013; ³MacFadden 1984; ⁴Prothero 2005; ⁵Rich 1981; ⁶Tedford and Barghoorn 1993; ⁷Wang et al. 1999