Bridgeport Quarries: Early/Lower Hemingfordian, Nebraska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Rhineuridae
Rhineura marslandensis Yatkola 1976
Yatkola 1976
UNSM Mo-115
Reptilia - Iguanidae
Sceloporus sp. Wiegmann 1828
Yatkola 1976
UNSM Mo-115
Mammalia - Carnivora - Ursidae
Cephalogale sp. Jourdan 1862
Hunt 1998
said to be new
Mammalia - Carnivora - Amphicyonidae
? Ysengrinia sp. Ginsburg 1965
Hunt 1972
    = Amphicyonidae indet. Haeckel 1886
Hunt 2002
Cynelos sp. Jourdan 1862
Hunt 1972
Daphoenodon (Borocyon) robustum (Peterson 1910)
Hunt 2009
Mammalia - Carnivora - Canidae
Metatomarctus canavus (Simpson 1932)
Wang et al. 1999
UNSM Mo-113, 114, 116
Desmocyon thomsoni (Matthew 1907)
Wang et al. 1999
UNSM Mo-113
Cynarctoides acridens (Barbour and Cook 1914)
Wang et al. 1999
UNSM Mo-115
Osbornodon iamonensis (Sellards 1916)
Wang 1994
Mammalia - Perissodactyla - Equidae
Parahippus sp. (Leidy 1858)
    = Equidae indet. Gray 1821
Alroy 2002
Anchitherium sp. von Meyer 1844
Forsten 1991
confirmed by MacFadden 2001
Hypohippus sp. (Leidy 1858)
original and current combination Anchitherium (Hypohippus)
Archaeohippus sp. Gidley 1906
Mammalia - Perissodactyla - Rhinocerotidae
Diceratherium niobrarensis Peterson 1906
    = Menoceras barbouri Wood 1964
Alroy 2002
or "Menoceras falkenbachi": Prothero and Manning 1987
    = Diceratherium niobrarense Peterson 1906
Prothero 2005
original and current combination Diceratherium niobrarensis
Menoceras barbouri (Wood 1964)
Prothero 2005
(1 measurement)
Mammalia - Merycoidodontidae
Merychyus arenarum Cope 1884
described by Schultz and Falkenbach 1947 as from Quarry 1, 5, 11
Mammalia - Camelidae
Oxydactylus sp. Peterson 1904
    = Camelidae indet. Gray 1821
Alroy 2002
Mammalia - Hypertragulidae
Hypertragulus minor n. sp. Frick 1937
Frick 1937
UNSM 9-3-7-34; "From Bridgeport, Morrill County, Nebraska"
Mammalia - Moschidae
Blastomeryx schultzi n. sp.
    = Pseudoblastomeryx schultzi Frick 1937
Alroy 2002
synonym of Pseudoblastomeryx advena
from Quarry 1 see Frick 1937
Mammalia - Palaeomerycidae
Barbouromeryx sweeti n. sp. Frick 1937
from Quarry 1 also at Quarry 2: Frick 1937
    = Barbouromeryx trigonocorneus Barbour and Schultz 1934
Liter and Prothero 2003
Aletomeryx lugni n. sp. Frick 1937
Frick 1937
synonym of Aletomeryx gracilis
from Quarry 3 also at Quarry 2
see common names

Geography
Country:United States State/province:Nebraska County:Morrill
Coordinates: 41.7° North, 103.1° West (view map)
Paleocoordinates:42.4° North, 99.2° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Neogene Epoch:Miocene
Stage:Burdigalian 10 m.y. bin:Cenozoic 5
*Period:Tertiary
Key time interval:Early/Lower Hemingfordian
Age range of interval:18.50000 - 16.30000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Runningwater
Lithology and environment
Primary lithology: not reported
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Museum repositories:UNSM
Metadata
Also known as:UNSM Mo-113, 114, 115, 116, 118
Database number:17881
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:G. Varnham Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2022-05-04 04:47:10
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
6204. R. M. Stecher, C. B. Schultz, and L. G. Tanner. 1962. A middle Miocene rhinoceros quarry in Morrill County, Nebraska (with notes on hip disease in Diceratherium). Bulletin of the University of Nebraska State Museum 4(7):101-111 [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]
6241 A. Forsten. 1991. Size trends in Holarctic anchitherines (Mammalia, Equidae). Journal of Paleontology 65(1):147-159 [J. Alroy/J. Alroy/J. Alroy]
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]
1966 R. M. Hunt, Jr. 1972. Miocene amphicyonids (Mammalia, Carnivora) from the Agate Spring Quarries, Sioux County, Nebraska. American Museum Novitates 2506:1-39 [J. Alroy/J. Alroy/J. Ju]
1976 R. M. Hunt, Jr. 1998. Ursidae. In C. M. Janis, K. M. Scott, and L. L. Jacobs (eds.), Evolution of Tertiary Mammals of North America 1:174-195 [J. Alroy/J. Alroy/M. Uhen]
54871 R. M. Hunt, Jr. 2009. Long-Legged Pursuit Carnivorans (Amphicyonidae, Daphoeninae) From the Early Miocene of North America. Bulletin of the American Museum of Natural History 318:1-95 [J. Marcot/J. Marcot]
51726 D. R. Prothero. 2005. The Evolution of North American Rhinoceroses. 1-218 [J. Marcot/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]
7577 D. A. Yatkola. 1976. Mid-Miocene lizards from western Nebraska. Copeia 1976(4):645-654 [J. Alroy/J. Alroy/J. Alroy]