Ash Spring (Eocene of the United States)

Also known as TMM 40283

Where: Jeff Davis County, Texas (30.7° N, 104.0° W: paleocoordinates 32.1° N, 96.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Vieja Group, Chadronian (37.2 - 33.9 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the TMM

Primary reference: J. M. Harris. 1967. Toxotherium (Mammalia: Rhinocerotoidea) from Western Jeff Davis County, Texas. Pearce-Sellards Series 9 [J. Alroy/J. Alroy/J. Ju]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 16894: authorized by John Alroy, entered by John Alroy on 26.07.1994, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• Ash Spring list of Wilson 1977b includes all and only taxa from TMM 40283; I believe there are no other TMM localities in Jeff Davis Co.
stratigraphic level uncertain as there are no useable marker beds in the immediate area, but supposed on faunistic grounds to be the youngest fauna in the Vieja sequence
Stevens and Stevens 1996 suggest that this is Orellan
Oromerycinae indet.7
two species: presumably includes Harris' "Eotylopus"
 Pulmonata - Camaenidae
 Rodentia -
Meliakrouniomys wilsoni n. sp.3 Harris and Wood 1969 rodent
 Rodentia - Ischyromyidae
Ischyromys sp.4 Leidy 1856 rodent
 Rodentia - Cylindrodontidae
Pseudocylindrodon cf. texanus7 Wood 1974 rodent
see Wood 1974
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet.7 Gray 1821 rhinoceros
presumably = "? Prothyracodon"
 Perissodactyla -
? Toxotherium sp.8 Wood 1961 odd-toed ungulate
 Ferae -
Carnivora indet.1 Bowditch 1821 carnivoran
 Ungulata - Merycoidodontidae
"Merycoidodon culbertsoni" = Merycoidodon (Merycoidodon) culbertsoni6
"Merycoidodon culbertsoni" = Merycoidodon (Merycoidodon) culbertsoni6 Leidy 1848 oreodont
 Ungulata - Entelodontidae
Archaeotherium cf. mortoni7 Leidy 1850 even-toed ungulate
see Wilson 1971b
 Ungulata - Praetragulidae
Parvitragulus priscus2 Emry 1978 ruminant