Cottonwood Creek (UNSM Dw-118): Early/Lower Hemingfordian, Nebraska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Lagomorpha - Ochotonidae
Oreolagus sp. Dice 1917
    = Oreolagus nebrascensis McGrew 1941
Bailey 2004
Mammalia - Lagomorpha - Leporidae
Archaeolagus sp. Dice 1917
Bailey 2004
Mammalia - Rodentia - Zapodidae
Plesiosminthus sp. Viret 1926
    = Zapodidae indet. Coues 1875
Alroy 2002
    = Plesiosminthus clivosus Galbreath 1953
Bailey 2004
recombined as Schaubeumys clivosus
Mammalia - Rodentia - Cricetidae
Yatkolamys edwardsi n. sp. Martin and Corner 1980
Mammalia - Rodentia - Entoptychidae
Ziamys hugeni Korth et al. 1990
Bailey 2004
Mammalia - Rodentia - Sciuridae
Miospermophilus sp. Black 1963
Bailey 2004
Sciuridae indet. Gray 1821
    = Protospermophilus sp. Gazin 1930
Bailey 2004
Mammalia - Rodentia - Mylagaulidae
Mylagaulidae indet. Cope 1881
    = Mesogaulus paniensis Matthew 1902
Bailey 2004
Mammalia - Rodentia - Heteromyidae
Harrymys magnus (Wood 1932)
Bailey 2004
Proheteromys sp. Wood 1932
Bailey 2004
Stratimus strobeli n. sp. Korth et al. 1990
Korth et al. 1990
also at UNSM Dw-117; "Heteromyidae indet." in part
Schizodontomys amnicolus Korth et al. 1990
Korth et al. 1990
"Heteromyidae indet." in part
Mammalia - Carnivora
Carnivora indet. Bowdich 1821
Mammalia - Merycoidodontidae
Merychyus sp. Leidy 1858
Mammalia
Cervidae indet. Gray 1821
    = Ruminantia indet. Scopoli 1777
Alroy 2002
(small)
Mammalia - Palaeomerycidae
Aletomeryx sp. Lull 1920
Mammalia - Camelidae
? Oxydactylus sp. Peterson 1904
Mammalia - Erinaceidae
Parvericius montanus Koerner 1940
Ostrander 1986
Mammalia - Proscalopidae
Mesoscalops scopelotemos Reed 1960
Ostrander 1986
Mammalia - Talpidae
Mystipterus (Mydecodon) martini (Wilson 1960)
Ostrander 1986
Scalopoides isodens Wilson 1960
Bailey 2004
Mammalia - Soricidae
Pseudotrimylus sp. Gureev 1971
Bailey 2004
Reptilia - Testudines
Chelonia indet. (Latreille 1800)
synonym of Testudines
"two chelonians"
Reptilia - Serpentes
Serpentes indet. Linnaeus 1758
"several snakes"
Reptilia - Iguanidae
Iguanidae indet. Oppel 1811
"at least two iguanid lizards"
Reptilia
Aves indet. Linnaeus 1758
"at least two avians"
Amphibia - Temnospondyli
Anura indet. (Fischer von Waldheim 1813)
"several anurans"
Actinopteri - Cyprinodontiformes
Cyprinodontiformes indet. Bertin 1958
"a cypriniform fish"
see common names

Geography
Country:United States State/province:Nebraska County:Dawes
Coordinates: 42.5° North, 103.0° West (view map)
Paleocoordinates:43.2° North, 99.1° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Time
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
*Period:Late/Upper Tertiary *Epoch:Early/Lower Miocene
*Local age/stage:Hemingfordian
Key time interval:Early/Lower Hemingfordian
Age range of interval:18.50000 - 16.30000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Runningwater
Local section:PineR Local bed:16
Local order:bottom to top
Stratigraphic resolution:member
Stratigraphy comments: formation given as Marsland, which is equivalent to Runningwater
Lithology and environment
Primary lithology:"cross stratification",brown poorly lithified sandstone
Lithology description: "brown, crossbedded, semiconsolidated sands"
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Disassociated major elements:some
Collection methods and comments
Collection methods:bulk,sieve,field collection
Reason for describing collection:taxonomic analysis
Museum repositories:UNSM
Collection method comments: collected by screenwashing of sediments exposed in road cuts; see Ostrander 1986
Taxonomic list comments:possibly relevant: "Merycochoerus proprius" and "M. proprius magnus" Schultz and Falkenbach 1940: "Cottonwood Creek" near Hemingford
Metadata
Database number:17892
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:G. Varnham Research group:vertebrate
Created:1995-10-18 00:00:00 Last modified:2022-05-04 04:48:28
Access level:the public Released:1995-10-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
2428.5% 31880L. D. Martin and R. G. Corner. 1980. A new genus of cricetid rodent from the Hemingfordian (Miocene) of Nebraska. University of Kansas Paleontological Contributions Vertebrata 103:1-5 [J. Alroy/J. Alroy/J. Alroy]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]
19303 B. E. Bailey. 2004. Biostratigraphy and biochronology of early Arikareean through late Hemingfordian small mammal faunas from the Nebraska Panhandle and adjacent areas. Paludicola 4(3):81-113 [J. Alroy/J. Alroy]
21525% 20540W. W. Korth, B. E. Bailey, and R. M. Hunt, Jr. 1990. Geomyoid rodents from the early Hemingfordian (Miocene) of Nebraska. Annals of Carnegie Museum 59(1):25-47 [J. Alroy/J. Alroy/M. Carrano]
2718 G. E. Ostrander. 1986. Insectivora (Mammalia) from the Miocene (Hemingfordian) of western Nebraska. Transactions of the Nebraska Academy of Sciences 14:21-24 [J. Alroy/J. Alroy/J. Alroy]