Charley Risley Ranch (Miocene of the United States)

Also known as Dilli Place; Rizzey Ranch; Turkey Creek

Where: Donley County, Texas (35.0° N, 100.8° W: paleocoordinates 35.5° N, 98.3° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Clarendon Beds Formation, Clarendonian (13.6 - 10.3 Ma)

Environment/lithology: "floodplain"; concretionary, gray, calcareous claystone and coarse-grained sandstone

• "flood-plain deposit"
• "Gray, somewhat calcareous clay predominates... interbedded in some instances with coarse sand... Many of the specimens collected are incased in hard calcitic concretions."

Size class: macrofossils

Preservation: concretion

Collected by Will Chamberlain, Works Progress Administration in 1936

• reposited in the West Texas State Teachers College collection

Primary reference: C. S. Johnston. 1938. The skull of Nannippus gratus (Leidy) from the Lower Pliocene of Texas. American Midland Naturalist 19(1):245-248 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 18347: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• equids: Hulbert 1989 pers. commun.
 Perissodactyla - Rhinocerotidae
Teleoceras major5 Hatcher 1894 rhinoceros
 Perissodactyla - Equidae
Pseudhipparion hessei7 Webb and Hulbert 1986 hipparionine horse
"Charley Rizzley Ranch"
Pliohippus fossulatus3 Cope 1893 horse
pers. commun.: type; listed by Schultz 1990c under "P. pernix"; type loc. is "Whitfish Creek, 2 mi. S Allan reed"
Pliohippus pernix6 Marsh 1874 horse
supposedly includes type of P. pachyops (but see Forsten 1991, Kelly 1995, 1998)
Protohippus supremus2 Leidy 1869 horse
Calippus martini3 Hesse 1936 horse
pers. commun.
Calippus regulus3 Johnston 1937 horse
pers. commun.
Calippus placidus3 Leidy 1869 horse
pers. commun.
 Ungulata - Camelidae
Camelidae indet.1 Gray 1821 camel
 Ungulata - Protoceratidae
Synthetoceras tricornatus4 Stirton 1932 protoceratid
Dilli Place