Little Muddy Creek (Niobrara County): Arikareean, Wyoming
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Perissodactyla
- Rhinocerotidae
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Diceratherium armatum
Marsh 1875
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Prothero 2005 | |||||||||
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Diceratherium annectens
(Marsh 1873)
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Prothero 2005 | |||||||||
| "Middle Arikareean, Monroe Creek Formation, 3.5 miles west of Muddy Creek Bridge, Niobrara County, Wyoming" | ||||||||||
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Mammalia
- Moschidae
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Parablastomeryx falkenbachi
Frick 1937
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Frick 1937 | |||||||||
| synonym of Pseudoblastomeryx advena | ||||||||||
| "Little Muddy Creek" | ||||||||||
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Mammalia
- Merycoidodontidae
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Pseudodesmatochoerus milleri
Schultz and Falkenbach 1954
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Schultz and Falkenbach 1954 | |||||||||
| Gering Fm. | ||||||||||
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Mesoreodon megalodon
Peterson 1907
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Schultz and Falkenbach 1949 | |||||||||
| recombined as Desmatochoerus megalodon | ||||||||||
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Desmatochoerus hatcheri
(Douglass 1907)
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Schultz and Falkenbach 1954 | |||||||||
| F:AM 33305 holotype of "Desmatochoerus hatcheri geringensis" | ||||||||||
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Megoreodon grandis
(Douglass 1907)
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Schultz and Falkenbach 1954 | |||||||||
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Desmatochoerus (Paradesmatochoerus) grangeri n. sp.
Schultz and Falkenbach 1954
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Schultz and Falkenbach 1954 | |||||||||
| synonym of Mesoreodon minor | ||||||||||
| F:AM 33303 | ||||||||||
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Desmatochoerus wyomingensis
Schultz and Falkenbach 1954
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Korth and Evander 2016 | |||||||||
| synonym of Mesoreodon minor | ||||||||||
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Mesoreodon cheeki
(Schlaikjer 1934)
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Schultz and Falkenbach 1949 | |||||||||
| synonym of Mesoreodon minor | ||||||||||
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Sespia nitida
(Leidy 1869)
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Schultz and Falkenbach 1968 | |||||||||
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Pithecistes altageringensis n. sp.
Schultz and Falkenbach 1968
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Schultz and Falkenbach 1968 | |||||||||
| synonym of Leptauchenia decora | ||||||||||
| also their "L. parasimus" from "upper Gering" | ||||||||||
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Hadroleptauchenia densa
(Loomis 1925)
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Schultz and Falkenbach 1968 | |||||||||
| synonym of Leptauchenia major | ||||||||||
| includes their "Pseudocyclopidius lullianus"; both from the "upper Gering" | ||||||||||
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Mammalia
- Camelidae
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Pseudolabis dakotensis
Matthew 1904
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Prothero 1996 | |||||||||
| "Little Muddy Creek area, Goshen Co." | ||||||||||
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Miotylopus leonardi
(Loomis 1911)
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Prothero 1996 | |||||||||
| "Little Muddy Creek area, Niobrara County" | ||||||||||
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Miotylopus gibbi
(Loomis 1911)
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Prothero 1996 | |||||||||
| "Little Muddy Creek, Niobrara County" | ||||||||||
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Mammalia
- Carnivora
- Canidae
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Archaeocyon leptodus
(Schlaikjer 1935)
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Wang et al. 1999 | |||||||||
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Phlaocyon minor
(Matthew 1907)
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Wang et al. 1999 | |||||||||
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Otarocyon cooki
(Macdonald 1963)
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Wang et al. 1999 | |||||||||
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Philotrox condoni
Merriam 1906
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Wang 1994 | |||||||||
| level not indicated | ||||||||||
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Enhydrocyon pahinsintewakpa
(Macdonald 1963)
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Wang 1994 | |||||||||
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Ectopocynus intermedius n. sp.
Wang 1994
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Wang 1994 | |||||||||
| 10 ft below white layer in "low" horizon | ||||||||||
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Ectopocynus antiquus n. sp.
Wang 1994
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Wang 1994 | |||||||||
| middle brown sand | ||||||||||
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Mammalia
- Rodentia
- Florentiamyidae
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Florentiamys kennethi
Wahlert 1983
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Wahlert 1983 | |||||||||
| synonym of Florentiamys tiptoni | ||||||||||
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Florentiamys kingi
Wahlert 1983
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Wahlert 1983 | |||||||||
| Gering Fm. (3 measurements) | ||||||||||
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Florentiamys kinseyi
Wahlert 1983
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Wahlert 1983 | |||||||||
| Gering Fm. (1 measurement) | ||||||||||
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Mammalia
- Rodentia
- Castoridae
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Capacikala parvus n. sp.
Xu 1996
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| "High level of middle brown sand, Little Muddy Creek" (i.e., upper level) | ||||||||||
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Capacikala gradatus
(Cope 1878)
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| "Lower and middle Little Muddy Creek, Niobrara County" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Wyoming | County: | Niobrara |
| Coordinates: | 43.0° North, 104.5° West (view map) | ||||
| Paleocoordinates: | 43.9° North, 98.7° West | ||||
| Basis of coordinate: | based on political unit |
Time
| 10 m.y. bin: | Cenozoic 4-5 | ||
| *Period: | Tertiary | *Epoch: | Oligocene |
| Key time interval: | Arikareean | ||
| Age range of interval: | 29.50000 - 18.50000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection excludes: | some genera |
| Taxonomic list comments:Xu 1996 implies that the lower/middle levels are significantly older than the upper level, but separating out the records is impossible given the available literature | |
Metadata
| Database number: | 17532 | ||
| Authorizer: | J. Alroy, J. Marcot | Enterer: | J. Alroy, J. Marcot | Research group: | vertebrate |
| Created: | 2000-05-19 00:00:00 | Last modified: | 2002-06-03 03:27:42 |
| Access level: | the public | Released: | 2000-05-19 00:00:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 3779. | X. Xu. 1996. Castoridae. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 412-432 [J. Alroy/J. Alroy/J. Marcot] |
Secondary references:
| 6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
| 6222 | C. Frick. 1937. Horned ruminants of North America. Bulletin of the American Museum of Natural History 69:1-669 [J. Alroy/J. Alroy/M. Uhen] | |
| 58390 | W. W. Korth and R. L. Evander. 2016. Lipotyphla, Chiroptera, Lagomorpha, and Rodentia (Mammalia) from Observation Quarry, Earliest Barstovian (Miocene), Dawes County, Nebraska. Annals of Carnegie Museum 83(3):219-254 [J. Zijlstra/J. Zijlstra] | |
| 2805 | 5% 6280 | D. R. Prothero. 1996. Camelidae. In D. R. Prothero and R. J. Emry (eds.), The Terrestrial Eocene-Oligocene Transition in North America 609-651 [J. Alroy/J. Alroy/J. Marcot] |
| 51726 | D. R. Prothero. 2005. The Evolution of North American Rhinoceroses. 1-218 [J. Marcot/J. Marcot] | |
| 3065 | C. B. Schultz and C. H. Falkenbach. 1949. Promerycochoerinae, a new subfamily of oreodonts. Bulletin of the American Museum of Natural History 93(3):69-198 [J. Alroy/J. Alroy/J. Marcot] | |
| 3067 | C. B. Schultz and C. H. Falkenbach. 1954. Desmatochoerinae, a new subfamily of oreodonts. Bulletin of the American Museum of Natural History 105(2) [J. Alroy/J. Alroy/J. Ju] | |
| 3069 | C. B. Schultz and C. H. Falkenbach. 1968. The Phylogeny of the Oreodonts. Part 1: Merycoidodontinae, Eporeodontinae, and Leptaucheniinae, Three Subfamilies Of Oreodonts, With an Appendix to the Revision Of The Merycoidodontidae, and Part 2. Summary and Conclusions Concerning the Merycoidodontidae. Bulletin of the American Museum of Natural History 139:1-498 [J. Alroy/J. Alroy/J. Marcot] | |
| 3528 | J. H. Wahlert. 1983. Relationships of the Florentiamyidae (Rodentia, Geomyoidea) based on cranial and dental morphology. American Museum Novitates 2769:1-23 [J. Alroy/J. Alroy/J. Marcot] | |
| 6226 | X. Wang. 1994. Phylogenetic systematics of the Hesperocyoninae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 221:1-207 [J. Alroy/J. Alroy/J. Alroy] | |
| 3558 | X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy] |