Poison Ivy Quarry: Clarendonian, Nebraska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Reptilia - Colubridae
Tucker et al. 2014
Reptilia - Iguanidae
Sceloporus sp. Wiegmann 1828
Tucker et al. 2014
two species; from gut contents
Reptilia - Teiidae
Tucker et al. 2014
from gut contents
Reptilia - Scincidae
Plestiodon sp. Dumeril and Bibron 1839
Tucker et al. 2014
from gut contents
Reptilia - Testudines - Emydidae
Chrysemys sp. Gray 1844
Tucker et al. 2014
skeletons, said to be new sp.
Reptilia - Testudines - Testudinidae
Voorhies 1985 10 specimens
ETE number of identifiable specimens; species: Testudinidae
Tucker et al. 2014
Reptilia - Accipitriformes - Accipitridae
Tucker et al. 2014
Tucker et al. 2014
Reptilia - Gruiformes - Gruidae
Voorhies 1985 36 specimens
Tucker et al. 2014
Reptilia - Gruiformes - Rallidae
Rallidae indet. Vigors 1825
Tucker et al. 2014
Mammalia - Proboscidea - Gomphotheriidae
Tucker et al. 2014
Mammalia - Chiroptera - Vespertilionidae
Myotis sp. Kaup 1829
Czaplewski et al. 1999
a bat
Mammalia - Rodentia - Cricetidae
Tucker et al. 2014
from gut contents
Korth 1997
said to be "the new genus and species of sigmodontine" from Pratt Quarry, later described by Korth 1998c
Mammalia - Rodentia - Geomyidae
Korth 1997
(1 measurement)
Mammalia - Rodentia - Heteromyidae
Korth 1997
Mammalia - Rodentia - Sciuridae
Ammospermophilus junturensis (Shotwell and Russell 1963)
Korth 1997
Korth 1997
(1 measurement)
Mammalia - Rodentia - Mylagaulidae
    = Mylagaulidae indet. Cope 1881
Korth 2000
no mylagaulids are mentioned by Korth 1997b
Tucker et al. 2014
Mammalia - Lagomorpha - Ochotonidae
Mammalia - Lagomorpha - Leporidae
Alroy 2002
Mammalia - Erinaceidae
Erinaceidae indet. Fischer von Waldheim 1817
Mammalia - Talpidae
Talpidae indet. (Fischer de Waldheim 1817)
Mammalia - Carnivora - Canidae
Wang et al. 1999
Tucker et al. 2014
Tucker et al. 2014
Mammalia - Moschidae
Mammalia - Merycoidodontidae
Alroy 2002
Mammalia - Camelidae
Tucker et al. 2014
Tucker et al. 2014
Mammalia - Perissodactyla - Rhinocerotidae
accords with Mead 1999a, Prothero 1989 pers. comm. (2 measurements)
Mammalia - Perissodactyla - Equidae
JA pers. obs. 17.6.91; supported by Famoso and Pagnac, 2011
supported by Famoso and Pagnac, 2011
JA pers. obs.: "Cormohipparion occidentale"; new small, short notch species
Tucker et al. 2014
supported by Famoso and Pagnac, 2011
agrees with JA pers. obs. 17.6.91; supported by Famoso and Pagnac, 2011
Alroy 2002
agrees with JA pers. obs. 17.6.91
Tucker et al. 2014
supported by Famoso and Pagnac, 2011
Angiospermae - Poales - Poaceae
Tucker et al. 2014
from gut contents
Tucker et al. 2014
from gut contents
see common names

Geography
Country:United States State/province:Nebraska County:Antelope
Coordinates: 42.3° North, 98.0° West (view map)
Paleocoordinates:44.9° North, 92.7° West (Wright 2013)
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period: Neogene Epoch: Miocene
10 m.y. bin: Cenozoic 5-6
*Period:Tertiary
Key time interval: Clarendonian
Age range of interval: 12.5 - 9.4 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Ash Hollow Member:Cap Rock
Local section:ValAH Local bed:5
Local order:bottom to top
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Taxonomic list comments:most of the small mammals are from the sandstone level beneath the main ash layer
">20" horse skeletons in total
Perkins 1998 "tentatively" correlates the main ash bed with the Ibex Hollow ash bed, dated in Idaho at 11.93 +/- 0.03 Ma (SCLF Ar/Ar)
list of Voorhies 1985 differs considerably, but in most cases because of preliminary identifications; however, "cf. Leptocyon sp." is omitted by Voorhies 1990 and is of unclear status
Metadata
Also known as:Ashfall; UNSM Ap-116
Database number:18324
Authorizer:J. Alroy, P. Holroyd, A. Behrensmeyer Enterer:J. Alroy, A. Behrensmeyer, P. Holroyd
Modifier:J. Alroy Research group:vertebrate
Collections that are a subset of this one:188779
Created:1992-08-05 00:00:00 Last modified:2025-02-22 15:12:02
Access level:the public Released:1992-08-05 00:00:00
Creative Commons license:CC0
Reference information

Primary reference:
3510. M. R. Voorhies. 1990. Vertebrate biostratigraphy of the Ogallala Group in Nebraska. In T. C. Gustavson (ed.), Geologic Framework and Regional Hydrology: Upper Cenozoic Blackwater Draw and Ogallala Formations, Great Plains 115-151 [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]
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]
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]
63362 S. T. Tucker, R. E. Otto, R. M. Joeckel and M. R. Voorhies. 2014. The geology and paleontology of Ashfall Fossil Beds, a late Miocene (Clarendonian) mass-death assemblage, Antelope County and adjacent Knox County, Nebraska, USA. Geological Society of America Field Guide 36:1-22 [P. Holroyd/P. Holroyd/M. Uhen]
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]