Pratt Quarry: Late/Upper Clarendonian, Nebraska
collected by C. E. Rudnick 1994

List of taxa
Where & when
Taphonomy & methods
Metadata & references
Taxonomic list
Cranioceras mefferdi Frick 1937
    = Cranioceratinae indet.
Frick 1937
"tentatively referred" on basis of one astragalus; from "Pratt Ranch, north of Johnstown, Brown County"
Cosoryx furcatus Leidy 1869
    = Merycodontini indet.
Frick 1937
postcrania from "McConnell's Ranch, Brown County"
Reptilia - Squamata - Boidae
Erycinae indet. Bonaparte 1825
Parmley and Hunter 2010 3 specimens
invalid subgroup of Boidae
Calamagras or Ogmophis
Tregophis brevirachis Holman 1975
Parmley and Hunter 2010 3 specimens
Reptilia - Squamata - Colubridae
Colubrinae indet. Oppel 1811
Parmley and Hunter 2010 2 specimens
Coluber or Masticophis
Texasophis sp. Holman 1977
Parmley and Hunter 2010 1 specimen
Elaphe sp. Wagler 1833
Parmley and Hunter 2010 6 specimens
Elaphe cf. kansensis (Gilmore 1938)
Parmley and Hunter 2010 2 specimens
cf. Opheodrys sp. Fitzinger 1843
Parmley and Hunter 2010 1 specimen
Ameiseophis robinsoni Holman 1976
Parmley and Hunter 2010 3 specimens
Paracoluber storeri Holman 1970
Parmley and Hunter 2010 2 specimens
Lampropeltis aff. getula (Linnaeus 1766)
Parmley and Hunter 2010 3 specimens
recombined as Lampropeltis getulus
Lampropeltis triangulum Lacépède 1788
Parmley and Hunter 2010 3 specimens
Pituophis sp. Holbrook 1842
Parmley and Hunter 2010 3 specimens
Xenodontinae indet. Bonaparte 1845
Parmley and Hunter 2010 15 specimens
Thamnophis sp. Fitzinger 1843
Parmley and Hunter 2010 12 specimens
Neonatrix cf. infera Holman 1996
Parmley and Hunter 2010 3 specimens
cf. Tropidoclonion sp. Cope 1860
Parmley and Hunter 2010 1 specimen
Micronatrix juliescottae n. gen., n. sp. Parmley and Hunter 2010
Parmley and Hunter 2010 5 specimens
Nerodia sp. Baird and Girard 1853
Parmley and Hunter 2010 1 specimen
Nerodia hillmani (Wilson 1968)
Parmley and Hunter 2010 6 specimens
Reptilia - Squamata - Crotalidae
cf. Agkistrodon sp. (Huxley 1865)
Parmley and Hunter 2010 2 specimens
nomen dubium belonging to Crocopoda
Sistrurus sp. Garman 1883
Parmley and Holman 2007 1 specimen
cf. Crotalus sp. Linnaeus 1758
Parmley and Hunter 2010 2 specimens
Mammalia - Rodentia - Cricetidae
Copemys sp. Wood 1936
Copemys pisinnus Wilson 1968
(1 measurement)
    = Tregomys pisinnus Wilson 1968
Alroy 2002
original and current combination Copemys pisinnus
Tregomys shotwelli Wilson 1968
recombined as Copemys shotwelli
(1 measurement)
Copemys mariae Baskin and Korth 1996
(1 measurement)
Antecalomys phthanus n. sp. Korth 1998
(6 measurements)
Mammalia - Rodentia - Sciuridae
Spermophilus cyanocittus Korth 1997
Korth 1997
"S. (O.) sp." said to be new, not yet published when 1998 paper went to print
cf. Sciurion sp. Skwara 1986
    = Tamiini indet.
Tedrow et al. 2001
synonym of Marmotini
possibly Paratamias, but not P. tarassus
Ammospermophilus junturensis (Shotwell and Russell 1963)
(1 measurement)
Protospermophilus cf. quatalensis (Gazin 1930)
? Petauristodon sp. Engesser 1979
Mammalia - Rodentia - Eomyidae
cf. Pseudotheridomys sp. Schlosser 1926
Mammalia - Rodentia - Geomyidae
Phelosaccomys hibbardi (Storer 1973)
recombined as Parapliosaccomys hibbardi
(6 measurements)
Mammalia - Rodentia - Heteromyidae
Cupidinimus prattensis n. sp. Korth 1998
(6 measurements)
Lignimus sp. Storer 1970
Mioheteromys cf. agrarius (Wood 1935)
original and current combination Diprionomys agrarius
Mammalia - Rodentia - Castoridae
Hystricops venustus (Leidy 1858)
see also Korth 1997b (5 measurements)
Dipoides tanneri n. sp. Korth 1998
(6 measurements)
Eucastor planus Stirton 1935
recombined as Nothodipoides planus
(6 measurements)
Mammalia - Rodentia - Mylagaulidae
Pterogaulus barbarellae Korth 2000
Korth 2000
"Mylagaulus monodon" in part
Mylagaulus monodon Cope 1881
    = Ceratogaulus anecdotus Korth 2000
Korth 2000
in part; "Epigaulus minor" of Korth 1997b
Mammalia - Rodentia - Zapodidae
Megasminthus sp. Klingener 1966
Mammalia - Lagomorpha - Leporidae
Hypolagus cf. vetus (Kellogg 1910)
Pronotolagus whitei n. sp. Korth 1998
(1 measurement)
Alilepus sp. Dice 1931
Mammalia - Lagomorpha - Ochotonidae
Russellagus sp. Storer 1970
Hesperolagomys cf. galbreathi Clark et al. 1964
Mammalia - Lipotyphla - Talpidae
Mystipterus sp. Hall 1930
Rudnick 1992
Domninoides mimicus Wilson 1968
Rudnick 1992
Scalopoides sp. Wilson 1960
Rudnick 1992
form A sensu Hutchison
Scalopoides ripafodiator Hutchison 1968
Rudnick 1992
Mammalia - Perissodactyla - Rhinocerotidae
Teleoceras major Hatcher 1894
Mead 1999
Aphelops megalodus (Cope 1873)
Prothero 2005
Mammalia - Perissodactyla - Tapiridae
Tapirus johnsoni Schultz et al. 1975
Czaplewski et al. 1999
Mammalia - Perissodactyla - Equidae
Cormohipparion occidentale (Leidy 1856)
Mihlbachler et al. 2011
Supplemental Table S1
Nannippus sp. (Matthew 1926)
Mihlbachler et al. 2011
Supplemental Table S1
Mammalia - Carnivora - Canidae
Leptocyon matthewi Tedford et al. 2009
Tedford et al. 2009
Epicyon saevus (Leidy 1858)
Wang et al. 1999
also at "Cap Rock Member... McConnel Place" and "Pratt Slide, Plum Creek"
Epicyon haydeni (Leidy 1858)
Wang et al. 1999
"Pratt Slide Quarry"; "Pratt Quarry"; and "Pratt Place"
Mammalia - Chiroptera - Vespertilionidae
Lasiurus sp. Gray 1831
Czaplewski et al. 1999
a bat
see common names

Country:United States State/province:Nebraska County:Brown
Coordinates: 42.6° North, 100.1° West (view map)
Paleocoordinates:43.1° North, 97.4° West
Basis of coordinate:stated in text
Geographic resolution:small collection
Period:Neogene Epoch:Miocene
*Period:Tertiary *Local age/stage:Late/Upper Clarendonian
Key time interval:Late/Upper Clarendonian
Age range of interval:13.60000 - 10.30000 m.y. ago
* legacy (obsolete) database fields
Formation:Ash Hollow Member:Merritt Dam
Local section:ValAH Local bed:6
Local order:bottom to top
Stratigraphy comments: said to be late Clarendonian
although Rudnick does not indicate the formation, this is clearly the same as Pratt Quarry of Skinner and Johnson 1984
Lithology and environment
Primary lithology: "siliciclastic"
Geology comments: "fluvial channel fill" (Parmley and Holman 2007)
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection excludes:some genera
Collection methods:bulk,sieve
Reason for describing collection:taxonomic analysis
Museum repositories:UNSM
Collectors:C. E. Rudnick Collection dates:1994
Collection method comments: a "sediment screened fauna [was] collected by Rudick (1994)" (Parmley and Holman 2007)
Taxonomic list comments:talpids, rodents, and lagomorphs only
Also known as:Pratt Slide; McConnell Slide; UNSM Bw-123
Database number:18327
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:J. Alroy Research group:vertebrate
Created:1995-03-26 00:00:00 Last modified:2011-02-26 04:49:50
Access level:the public Released:1995-03-26 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:

2136. W. W. Korth. 1998. Rodents and lagomorphs (Mammalia) from the Late Clarendonian (Miocene) Ash Hollow Formation, Brown County, Nebraska. Annals of Carnegie Museum 67(4):299-348 [J. Alroy/J. Alroy/M. Uhen]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Uhen]
1297ETE 1534N. J. Czaplewski, B. E. Bailey, and R. G. Corner. 1999. Tertiary bats (Mammalia: Chiroptera) from northern Nebraska. Transactions of the Nebraska Academy of Sciences 25:83-93 [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/J. Alroy]
2133 W. W. Korth. 1997. Additonal rodents (Mammalia) from the Clarendonian (Miocene) of northcentral Nebraska and a review of Clarendonian rodent biostratigraphy of that area. Paludicola 1(3):97-111 [J. Alroy/J. Alroy/M. Uhen]
2143 W. W. Korth. 2000. Review of Miocene (Hemingfordian to Clarendonian) mylagaulid rodents (Mammalia) from Nebraska. Annals of Carnegie Museum 69(4):227-280 [J. Alroy/J. Alroy/J. Marcot]
25465% 1540A. J. Mead. 1999. Enamel hypoplasia in Miocene rhinoceroses (Teleoceras) from Nebraska; evidence of severe physiological stress. Journal of Vertebrate Paleontology 19(2):391-397 [J. Alroy/J. Alroy/M. Carrano]
61275 M. C. Mihlbachler, F. Rivals, N. Solounias and G. M. Semprebon. 2011. Dietary Change and Evolution of Horses in North America. Science 331:1178-1181 [J. Marcot/J. Marcot]
26118 D. Parmley and J. A. Holman. 2007. Earliest Fossil Record of a Pigmy Rattlesnake (Viperidae: Sistrurus Garman). Journal of Herpetology 41(1):141-144 [J. Alroy/J. Alroy]
35340 D. Parmley and K. B. Hunter. 2010. Fossil snakes of the Clarendonian (late Miocene) Pratt Slide local fauna of Nebraska, with the description of a new natricine colubrid. Journal of Herpetology 44(4):526-543 [J. Alroy/J. Alroy]
51726 D. R. Prothero. 2005. The Evolution of North American Rhinoceroses. 1-218 [J. Marcot/J. Marcot]
2989 C. Rudnick. 1992. Proceedings of the Nebraska Academy of Sciences 112 [J. Alroy/J. Alroy/J. Alroy]
52058 R. H. Tedford, X. Wang, and B. E. Taylor. 2009. Phylogenetic Systematics of the North American Fossil Caninae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 325:1-218 [J. Marcot/J. Marcot]
6770 A. R. Tedrow, S. F. Robison, and W. W. Korth. 2001. Early Hemphillian (late Miocene) sciurid rodents (Mammalia) from southeastern Idaho. Paludicola 3(3):80-94 [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]