Beck Ranch ( of the United States)

Where: Scurry County, Texas (32.7° N, 100.9° W: paleocoordinates 32.8° N, 100.3° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Blancan (4.9 - 1.8 Ma)

• from a single bed that is 11 feet thick in a nearby measured section

• bed-level stratigraphic resolution

Environment/lithology: fluvial; pebbly sandstone

• "fine sediments deposited in backwaters associated with a stream system"
• "pebbly sandstone"

Size classes: macrofossils, mesofossils

Collection methods: bulk, sieve,

• "50 tons of fossil-bearing matrix collected for screen washing"

Primary reference: 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]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 20060: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• includes Yellow Quarry and White Quarry, which are "about 100 feet downstream"
Mammalia
 Rodentia - Cricetidae
Reithrodontomys cf. rexroadensis Hibbard 1952 harvest mouse
"Sigmodon medius" = Sigmodon minor Gidley 1922 cotton rat
Baiomys rexroadi Hibbard 1941 pygmy mouse
Neotoma cf. fossilis8 Gidley 1922 pack rat
Neotoma quadriplicata Hibbard 1941 pack rat
Ogmodontomys poaphagus Hibbard 1941 mouse
Symmetrodontomys simplicidens Hibbard 1941 mouse
Symmetrodontomys beckensis1 Dalquest 1978 mouse
Peromyscus kansasensis Hibbard 1941 deer mouse
Onychomys gidleyi Hibbard 1941 grasshopper mouse
 Rodentia - Sciuridae
Spermophilus sp. Cuvier 1825 ground squirrel
 Rodentia - Geomyidae
Nerterogeomys minor1 Gidley 1922 pocket gopher
 Rodentia - Heteromyidae
Prodipodomys centralis Hibbard 1941 rodent
Perognathus cf. rexroadensis Hibbard 1950 pocket mouse
Perognathus carpenteri n. sp. Dalquest 1978 pocket mouse
Perognathus pearlettensis Hibbard 1941 pocket mouse
 Lagomorpha - Leporidae
Nekrolagus progressus Hibbard 1939 rabbit
confirmed by White 1991a
Hypolagus regalis Hibbard 1939 rabbit
confirmed by White 1988
Hypolagus ringoldensis6 Gustafson 1978 rabbit
Notolagus lepusculus Hibbard 1939 rabbit
confirmed by White 1988, 1991
Pewelagus dawsonae6 White 1984 rabbit
Pratilepus kansasensis Hibbard 1939 rabbit
confirmed by White 1991a
Alilepus wilsoni7 White 1991 rabbit
 Lipotyphla - Talpidae
Hesperoscalops rexroadi1 Hibbard 1941 mole
 Perissodactyla - Rhinocerotidae
Rhinocerotidae indet.3 Gray 1821 rhinoceros
 Perissodactyla - Equidae
Nannippus beckensis n. sp.2, "Equus cf. simplicidens" = Equus (Dolichohippus) simplicidens2, "Equus cf. cumminsii" = Equus (Dolichohippus) simplicidens
Nannippus beckensis n. sp.2 Dalquest and Donovan 1973 hipparionine horse
"Equus cf. simplicidens" = Equus (Dolichohippus) simplicidens2 Cope 1892 horse
"Equus cf. cumminsii" = Equus (Dolichohippus) simplicidens Cope 1892 horse
 Tribosphenida - Soricidae
Paracryptotis rex Hibbard 1950 shrew
Sorex taylori Hibbard 1937 long-tailed shrew
Notiosorex jacksoni Hibbard 1950 gray shrew
Beckiasorex hibbardi Dalquest 1972 shrew
 Carnivora - Mephitidae
? Spilogale microdens Dalquest 1978 skunk
? Spilogale rexroadi Hibbard 1941 skunk
 Carnivora - Procyonidae
Nasua pronarica n. sp. Dalquest 1978 coati
Bassariscus casei Hibbard 1952 ringtail
 Carnivora - Mustelidae
Mustela rexroadensis Hibbard 1950 weasel
Brachyopsigale dubius Hibbard 1954 skunk
Buisnictis breviramus Hibbard 1941 skunk
Taxidea cf. taxus Schreber 1778 American badger
 Carnivora - Canidae
Vulpes velox Say 1823 swift fox
not denied by Anderson 1984
Canis lepophagus4 Johnston 1938 canine
Urocyon galushai4 Tedford et al. 2009 gray fox
Borophagus diversidens Cope 1892 bone-crushing dog
confirmed by Wang et al. 1999
 Carnivora - Felidae
"Lynx rexroadensis" = Felis rexroadensis5
"Lynx rexroadensis" = Felis rexroadensis5 Stephens 1959 cat
 Proboscidea - Proboscidea
Proboscidea indet. proboscidean
 Chiroptera - Vespertilionidae
Lasiurus borealis Muller 1776 hairy-tailed bat
a bat
Antrozous pallidus Le Conte 1856 pallid bat
a bat
Eptesicus fuscus Beauvois 1796 big brown bat
a bat
Lasionycteris noctivagans Le Conte 1831 silver-haired bat
a bat
 Ungulata - Tayassuidae
Platygonus bicalcaratus Cope 1893 peccary
 Ungulata - Camelidae
Hemiauchenia sp. Gervais and Ameghino 1880 camel
 Ungulata - Antilocapridae
Antilocapridae indet. Gray 1866 pronghorn