head of Rock Creek, Mayfield Ranch: Irvingtonian, Texas
collected by WPA 1941
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
- Testudines
- Testudinidae
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Testudo hexagonata n. sp.
Cope 1893
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| TMM 30967-1817 (holotype), shell fragments (Hay 1908, figs. 625–626; Auffenberg 1962a, figs. 1–2). | ||||||||||
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Testudo laticaudata n. sp.
Cope 1893
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| nomen dubium belonging to Testudinidae | ||||||||||
| TMM 41412-2 (holotype), a right epiplastron and xiphiplastron (Cope 1893, pl. 22; Hay 1908, figs. 623–624) | ||||||||||
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Mammalia
- Proboscidea
- Elephantidae
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Elephas primigenius
Blumenbach 1799
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| recombined as Mammuthus primigenius | ||||||||||
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Mammuthus imperator
(Leidy 1858)
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Hibbard and Dalquest 1966 | |||||||||
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= Mammuthus hayi
Barbour 1915
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Alroy 2002 | |||||||||
| "Mammuthus imperator haroldcooki": "M imperator" of Schultz 1990b; at Mylodon-Camel Quarry, see Troxell 1915a | ||||||||||
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Mammalia
- Proboscidea
- Gomphotheriidae
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Stegomastodon barbouri
(Osborn 1921)
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Hibbard and Dalquest 1966 | |||||||||
| recombined as Morrillia barbouri | ||||||||||
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Mammalia
- Lagomorpha
- Leporidae
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Sylvilagus sp.
Gray 1867
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Hibbard and Dalquest 1966 | |||||||||
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= Sylvilagus hibbardi
White 1984
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Dalquest and Schultz 1992 | |||||||||
| replaces ID of Schultz 1986 | ||||||||||
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Mammalia
- Carnivora
- Ursidae
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Arctodus simus
(Cope 1879)
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Schultz 1990 | |||||||||
| SCQ and isolated specimen | ||||||||||
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Mammalia
- Carnivora
- Canidae
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Canis texanus n. sp.
Troxell 1915
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Hibbard and Dalquest 1966 | |||||||||
| recombined as Xenocyon texanus | ||||||||||
| (1 measurement) | ||||||||||
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Canis dirus
Leidy 1858
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Hibbard and Dalquest 1966 | |||||||||
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= Canis armbrusteri
Gidley 1913
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Schultz 1986 | |||||||||
| "C. sp." of Nowak 1979 | ||||||||||
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Canis lepophagus
Johnston 1938
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Hibbard and Dalquest 1966 | |||||||||
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= Canis latrans
Say 1823
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Schultz 1986 | |||||||||
| replaces ID of Kurten and Anderson 1980; agrees with Nowak 1979 | ||||||||||
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Mammalia
- Bovidae
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? Preptoceras mayfieldi n. sp.
Troxell 1915
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Hibbard and Dalquest 1966 | |||||||||
| recombined as Soergelia mayfieldi | ||||||||||
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Mammalia
- Antilocapridae
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Hayoceros falkenbachi
(Frick 1937)
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Dalquest and Schultz 1992 | |||||||||
| "Hayoceros sp. or Tetrameryx" of Schultz 1986; "Texoceros shuleri" of Frick 1937 | ||||||||||
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Mammalia
- Tayassuidae
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Platygonus sp.
Leconte 1848
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Hibbard and Dalquest 1966 | |||||||||
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= Platygonus vetus
Leidy 1882
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Dalquest and Schultz 1992 | |||||||||
| "P. compressus" of Troxell 1915a from Mylodon-Camel Quarry | ||||||||||
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Mammalia
- Camelidae
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Camelops sulcatus n. sp.
(Cope 1893)
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Hibbard and Dalquest 1966 | |||||||||
| synonym of Camelops hesternus | ||||||||||
| H & D list "C. hesternus", no justification | ||||||||||
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Holomeniscus sulcatus
Cope 1893
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| synonym of Camelops hesternus | ||||||||||
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Tanupolama macrocephala
(Cope 1893)
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Hibbard and Dalquest 1966 | |||||||||
| recombined as Hemiauchenia macrocephala | ||||||||||
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Holomeniscus macrocephalus
Cope 1893
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| recombined as Hemiauchenia macrocephala | ||||||||||
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Mammalia
- Perissodactyla
- Equidae
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Equus semiplicatus
Cope 1893
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Hibbard and Dalquest 1966 | |||||||||
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= Equus sp.
Linnaeus 1758
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Alroy 2002 | |||||||||
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Equus scotti n. sp.
Gidley 1900
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Hibbard and Dalquest 1966 | |||||||||
| synonym of Equus (Hesperohippus) mexicanus | ||||||||||
| from "head of Rock Creek" also at Equus scotti Quarry: Troxell 1915a | ||||||||||
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Equus calobatus n. sp.
(Troxell 1915)
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Hibbard and Dalquest 1966 | |||||||||
| synonym of Equus francisci | ||||||||||
| at Sloth-Camel Quarry, see Troxell 1915a; see also Hibbard 1970c | ||||||||||
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Equus major
DeKay 1842
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| synonym of Equus complicatus | ||||||||||
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Equus excelsus
Leidy 1858
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Equus tau
Owen 1869
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| synonym of Plesippus simplicidens | ||||||||||
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Mammalia
- Mylodontidae
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Paramylodon harlani
(Owen 1840)
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Hibbard and Dalquest 1966 | |||||||||
| at Mylodon-Camel Quarry: Troxell 1915a | ||||||||||
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Mylodon ? sodalis
Cope 1878
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| synonym of Paramylodon harlani | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Texas | County: | Briscoe |
| Coordinates: | 34.5° North, 101.4° West (view map) | ||||
| Paleocoordinates: | 34.5° North, 101.2° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Quaternary | Epoch: | Pleistocene |
| 10 m.y. bin: | Cenozoic 6 | ||
| Key time interval: | Irvingtonian | ||
| Age range of interval: | 1.40000 - 0.21000 m.y. ago | ||
| Age estimate: | minimum 0.62 ± 0.014 Ma (14C (calibrated)) |
Stratigraphy
Lithology and environment
| Primary lithology: | not reported |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection methods: | selective quarrying,surface (float),surface (in situ),field collection | ||
| Reason for describing collection: | general faunal/floral analysis | ||
| Museum repositories: | TMM | ||
| Collectors: | WPA | Collection dates: | 1941 |
| Taxonomic list comments:Equus scotti Quarry is 3 or 4 m below Sloth-Camel Quarry (SCQ), but the fauna entire fauna except Stegomastodon is represented at SCQ: Schultz 1990b
originally described by Troxell 1915a; field work reported by Gidley 1903 "Glyptotherium arizonae" is listed by Kurten and Anderson 1980: probably = "Glyptodon"; but omitted by Schultz 1986 and Dalquest and Schultz 1992 | |||
Metadata
| Also known as: | Equus scotti (Horse) Quarry; Evans and Meade Locality 6 (in part); Sloth-Camel (Mylodon-Camel) Quarry, TMM 31205 | ||
| Database number: | 20498 | ||
| Authorizer: | J. Alroy, E. Vlachos | Enterer: | J. Alroy, E. Vlachos |
| Modifier: | B. Allen | Research group: | vertebrate |
| Created: | 1993-02-18 00:00:00 | Last modified: | 2023-07-29 15:00:11 |
| Access level: | the public | Released: | 1993-02-18 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 53742. | E. D. Cope. 1893. A preliminary report on the vertebrate paleontology of the Llano Estacado. Fourth Annual Report of the Geological Survey of Texas 1892:11-136 [M. Carrano/M. Carrano] |
Secondary references:
| 6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
| 71468 | Anonymous. 1941. The ninth quarterly report covering the quarter ending June 30, 1941 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project. O.P. No. 665-66-3-233. State Serial No. 300-88 1-41 [M. Carrano/M. Carrano] | |
| 6202 | W. W. Dalquest and G. E. Schultz. 1992. Ice Age mammals of northwestern Texas 1-309 [J. Alroy/J. Alroy/M. Uhen] | |
| 1899 | C. W. Hibbard and W. W. Dalquest. 1966. Contributions from the Museum of Paleontology, University of Michigan 21(1) [J. Alroy/J. Alroy] | |
| 27885 | C. S. Johnston. 1937. The skull of Mylodon harlani from the Lower Pleistocene of West Texas. American Midland Naturalist 18(3):465-469 [J. Alroy/J. Alroy] | |
| 2392 | C. T. Madden. 1986. Stegomastodon associated with Mammuthus in Arizona during the Quaternary. Quaternary Research 26(2):266-271 [J. Alroy/J. Alroy/J. Ju] | |
| 3083 | G. E. Schultz. 1986. U Tex Austin Bureau of Economic Geology Guidebook 22 [J. Alroy/J. Alroy] | |
| 6206 | G. E. Schultz. 1990. Stop 8: Biostratigraphy and volcanic ash deposits of the Tule Formation, Briscoe County, Texas. In T. C. Gustavson (ed.), Tertiary and Quaternary stratigraphy and vertebrate paleontology of parts of northwestern Texas and eastern New Mexico; Guidebook - Bureau of Economic Geology, University of Texas at Austin 60-64 [J. Alroy/J. Alroy/J. Alroy] |