PBDB Collection

UCMP V-3310, Black Hawk Ranch (Miocene of the United States)

Where: Contra Costa County, California (37.8° N, 121.9° W: paleocoordinates 37.2° N, 118.2° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Green Valley Formation, Clarendonian (12.5 - 9.4 Ma)

Environment/lithology: terrestrial; siliciclastic sediments

Size class: macrofossils

Reposited in the UCMP

Primary reference: K. A. Richey. 1948. Lower Pliocene horses from Black Hawk Ranch, Mount Diablo, California. University of California Publications, Bulletin of the Department of Geological Sciences 28(1):1-44 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 19185: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• much lower in the fm. than tuff dated at 5.9 +/- 0.6 and 6.3 +/- 0.1 Ma: Tedford et al. 1987
slightly below UCMP V-3724, which yielded only a "fragment of a mastodont ulna"

Show authors, comments, and common names

Mammalia
Lagomorpha - Leporidae	Alilepus hibbardi¹¹ Alilepus hibbardi¹¹ White 1991 rabbit presumably = "Hypolagus sp."
Rodentia - Sciuridae	"Citellus (Otospermophilus) sp." = Otospermophilus "Citellus (Otospermophilus) sp." = Otospermophilus Brandt 1844 squirrel
Rodentia - Castoridae	"Eucastor lecontei" = Prodipoides lecontei "Eucastor lecontei" = Prodipoides lecontei Merriam 1896 beaver
Carnivora - Canidae	Leptocyon vafer³, "Osteoborus diabloensis n. sp." = Borophagus littoralis, Aelurodon cf. taxoides⁷ Leptocyon vafer³ Leidy 1858 canine "Osteoborus diabloensis n. sp." = Borophagus littoralis VanderHoof 1931 bone-crushing dog Aelurodon cf. taxoides⁷ Hatcher 1894 bone-crushing dog confirmed by Baskin 1998a, Wang et al. 1999; "A. cf. aphobus"; apparently includes "Osteoborus ricardoensis" (see footnote by Stirton in Richey 1948, p. 3)
Carnivora - Mustelidae	Leptarctus wortmani⁸, Mustelinae indet.³ Leptarctus wortmani⁸ Matthew 1924 mustelid carnivore Mustelinae indet.³ Fischer 1817 mustelid carnivore
Carnivora - Procyonidae	Procyonidae indet.⁹ Procyonidae indet.⁹ Gray 1825 procyonid carnivore
Carnivora - Nimravidae	Barbourofelis loveorum¹ Barbourofelis loveorum¹ Baskin 1981 false sabre-tooth
Carnivora - Felidae	Nimravides thinobates³ Nimravides thinobates³ Macdonald 1948 cat
Perissodactyla - Equidae	Hipparion forcei, "Pliohippus leardi" = Dinohippus leardi Hipparion forcei Richey 1948 hipparionine horse "Pliohippus leardi" = Dinohippus leardi Drescher 1941 horse
Artiodactyla - Merycoidodontidae	"Merychyus cf. major" = Ustatochoerus major² "Merychyus cf. major" = Ustatochoerus major² Leidy 1858 oreodont
Artiodactyla - Antilocapridae	Capromeryx sp.¹⁰ Capromeryx sp.¹⁰ Matthew 1902 pronghorn "? Merycodus"
Artiodactyla - Camelidae	Procamelus cf. grandis, Pliauchenia cf. magnifontis, Aepycamelus sp.³ Procamelus cf. grandis Gregory 1939 camel Pliauchenia cf. magnifontis Gregory 1939 camel Aepycamelus sp.³ Macdonald 1956 camel
Artiodactyla - Tayassuidae	Woodburnehyus grenaderae n. gen. n. sp.⁵ Woodburnehyus grenaderae n. gen. n. sp.⁵ Prothero and Pollen 2013 peccary
Proboscidea - Mammutidae	Gomphotherium obscurum⁶ Gomphotherium obscurum⁶ Leidy 1869 mastodon
Aves
Gruiformes - Gruidae	Grus conferta n. sp.⁴ Grus conferta n. sp.⁴ Miller and Sibley 1942 crane

¹Baskin 1981; ²Edwards 1982; ³Macdonald 1948; ⁴Miller and Sibley 1942; ⁵Prothero and Pollen 2013; ⁶Savage 1955; ⁷Tedford et al. 1987; ⁸Wagner and Reynolds 1983; ⁹Webb et al. 1981; ¹⁰Webb and Woodburne 1964; ¹¹White 1991