Beck Ranch: Blancan, Texas

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Chiroptera - Vespertilionidae
Lasionycteris noctivagans (Le Conte 1831)
a bat
Eptesicus fuscus (Beauvois 1796)
a bat
Lasiurus borealis (Muller 1776)
a bat
Antrozous pallidus (Le Conte 1856)
a bat
Mammalia - Proboscidea - Proboscidea
Proboscidea indet. Illiger 1811
Mammalia - Carnivora - Mustelidae
Mustela rexroadensis Hibbard 1950
Taxidea cf. taxus (Schreber 1778)
Mammalia - Carnivora - Procyonidae
Nasua pronarica n. sp. Dalquest 1978
Bassariscus casei Hibbard 1952
(1 measurement)
Mammalia - Carnivora - Mephitidae
Buisnictis breviramus (Hibbard 1941)
(1 measurement)
? Spilogale microdens Dalquest 1978
? Spilogale rexroadi Hibbard 1941
(1 measurement)
Brachyopsigale dubius Hibbard 1954
Mammalia - Carnivora - Canidae
Borophagus diversidens Cope 1892
confirmed by Wang et al. 1999
Canis cf. lepophagus Johnston 1938
    = Canis lepophagus Johnston 1938
Tedford et al. 2009
"attributed to Canis sp. by VanderHoof, 1933"
Urocyon sp. Baird 1857
    = Urocyon galushai Tedford et al. 2009
Tedford et al. 2009
Vulpes velox (Say 1823)
not denied by Anderson 1984
Mammalia - Carnivora - Felidae
Felis rexroadensis Stephens 1959
    = Lynx rexroadensis Stephens 1959
Werdelin 1985
original and current combination Felis rexroadensis
Mammalia - Perissodactyla - Equidae
Nannippus beckensis n. sp. Dalquest and Donovan 1973
Dalquest and Donovan 1973
(6 measurements)
Equus cf. cumminsii Cope 1893
misspelling Equus (Asinus) cumminsi
Equus cf. simplicidens Cope 1892
Dalquest and Donovan 1973
recombined as Plesippus simplicidens
Mammalia - Perissodactyla - Rhinocerotidae
Rhinocerotidae indet. Gray 1821
Madden and Dalquest 1990
Mammalia - Tayassuidae
Platygonus bicalcaratus Cope 1893
nomen dubium belonging to Platygonus
Mammalia - Camelidae
Hemiauchenia sp. Gervais and Ameghino 1880
Mammalia - Antilocapridae
Antilocapridae indet. Gray 1866
Mammalia - Talpidae
Scalopus rexroadi (Hibbard 1941)
    = Hesperoscalops rexroadi Hibbard 1941
Alroy 2002
recombined as Scalopus rexroadi
Mammalia - Soricidae
Sorex taylori Hibbard 1937
Paracryptotis rex Hibbard 1950
Beckiasorex hibbardi Dalquest 1972
(1 measurement)
Notiosorex jacksoni Hibbard 1950
Mammalia - Lagomorpha - Leporidae
Pratilepus kansasensis Hibbard 1939
confirmed by White 1991a
Alilepus wilsoni White 1991
White 1991
Hypolagus regalis Hibbard 1939
confirmed by White 1988
Hypolagus ringoldensis Gustafson 1978
White 1988
Notolagus lepusculus (Hibbard 1939)
confirmed by White 1988, 1991
Pewelagus dawsonae White 1984
White 1988
Nekrolagus progressus (Hibbard 1939)
confirmed by White 1991a
Mammalia - Rodentia - Cricetidae
Onychomys gidleyi Hibbard 1941
Peromyscus kansasensis Hibbard 1941
Neotoma cf. sawrockensis Hibbard 1967
    = Neotoma cf. fossilis Gidley 1922
Zakrzewski 1993
Neotoma quadriplicata (Hibbard 1941)
(1 measurement)
Symmetrodontomys simplicidens Hibbard 1941
Peromyscus beckensis n. sp. Dalquest 1978
    = Symmetrodontomys beckensis Dalquest 1978
Alroy 2002
Ogmodontomys poaphagus Hibbard 1941
Sigmodon medius Gidley 1922
synonym of Sigmodon minor
Reithrodontomys cf. rexroadensis Hibbard 1952
Baiomys rexroadi Hibbard 1941
Mammalia - Rodentia - Sciuridae
Spermophilus sp. Cuvier 1825
Mammalia - Rodentia - Geomyidae
Geomys minor Gidley 1922
    = Nerterogeomys minor Gidley 1922
Alroy 2002
Mammalia - Rodentia - Heteromyidae
Perognathus pearlettensis Hibbard 1941
Perognathus cf. rexroadensis Hibbard 1950
Perognathus carpenteri n. sp. Dalquest 1978
Prodipodomys centralis (Hibbard 1941)
see common names

Geography
Country:United States State/province:Texas County:Scurry
Coordinates: 32.7° North, 100.9° West (view map)
Paleocoordinates:32.8° North, 100.3° West
Basis of coordinate:based on nearby landmark
Altitude:1700 feet
Geographic resolution:outcrop
Time
10 m.y. bin:Cenozoic 6
*Period:Late/Upper Tertiary *Epoch:Pliocene
*Local age/stage:Blancan
Key time interval:Blancan
Age range of interval:4.70000 - 1.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: from a single bed that is 11 feet thick in a nearby measured section
Lithology and environment
Primary lithology:pebbly sandstone
Lithology description: "pebbly sandstone"
Environment:fluvial indet.
Geology comments: "fine sediments deposited in backwaters associated with a stream system"
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Collection methods:bulk,sieve,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: "50 tons of fossil-bearing matrix collected for screen washing"
Taxonomic list comments:includes Yellow Quarry and White Quarry, which are "about 100 feet downstream"
Metadata
Database number:20060
Authorizer:J. Alroy, J. Marcot Enterer:J. Alroy, J. Marcot
Modifier:J. Alroy Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2003-02-26 16:23:14
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
6330. W. W. Dalquest. 1978. Early Blancan mammals of the Beck Ranch local fauna of Texas. Journal of Mammalogy 59(2):269-298 [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]
1320 W. W. Dalquest and T. J. Donovan. 1973. A new three-toed horse (Nannippus) from the late Pliocene of Scurry County, Texas. Journal of Paleontology 47(1):34-45 [J. Alroy/J. Alroy/J. Alroy]
2393 C. T. Madden and W. W. Dalquest. 1990. The Last Rhinoceros in North America. Journal of Vertebrate Paleontology 10(2):266-267 [J. Alroy/J. Alroy/J. Ju]
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/G. Lloyd]
3585 L. Werdelin. 1985. Small Pleistocene felines of North America. Journal of Vertebrate Paleontology 5(3):194-210 [J. Alroy/J. Alroy/J. Alroy]
3632 J. A. White. 1988. The Archaeolaginae (Mammalia, Lagomorpha) of North America, Excluding Archaeolagus and Panolax. Journal of Vertebrate Paleontology 7(4):425-450 [J. Alroy/J. Alroy/J. Ju]
3633 J. A. White. 1991. North American Leporinae (Mammalia: Lagomorpha) from late Miocene (Clarendonian) to latest Pliocene (Blancan). Journal of Vertebrate Paleontology 11(1):67-89 [J. Alroy/J. Alroy/J. Alroy]
3797 R. J. Zakrzewski. 1993. Morphological change in woodrat (Rodentia: Cricetidae) molars. In R. A. Martin and A. D. Barnosky (eds.), Morphological change in Quaternary mammals of North America 392-410 [J. Alroy/J. Alroy/M. Uhen]