UCMP V-3611, Mulholland Site 2: Hemphillian, California
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Helminthoglypta sp.
Ancey 1887
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Firby 1967 | |||||||||
| locally abundant | ||||||||||
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Mammalia
- Lagomorpha
- Leporidae
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Hypolagus sp.
Dice 1917
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= Hypolagus tedfordi
White 1988
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White 1988 | |||||||||
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Mammalia
- Rodentia
- Cricetidae
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Peromyscus sp.
Gloger 1841
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Hoffmeister 1945 | |||||||||
| closely compares to Recent species | ||||||||||
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Pliotomodon primitivus n. sp.
Hoffmeister 1945
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Hoffmeister 1945 | |||||||||
| see also Jacobs and Lindsay 1984 (3 measurements) | ||||||||||
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Mammalia
- Rodentia
- Castoridae
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Dipoides sp.
Jaeger 1835
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Creely et al. 1982 | |||||||||
| confirmed as coming from this site by JA during visit to UCMP | ||||||||||
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Mammalia
- Carnivora
- Canidae
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Canidae indet.
Fischer de Waldheim 1817
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Mammalia
- Camelidae
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Camelidae indet.
Gray 1821
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Mammalia
- Perissodactyla
- Rhinocerotidae
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Teleoceras sp.
Hatcher 1894
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| probably "T cf. fossiger" from the Mulholland Fm. of Creely et al. 1982 | ||||||||||
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Mammalia
- Perissodactyla
- Equidae
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Pliohippus spectans
(Cope 1880)
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| recombined as Dinohippus spectans | ||||||||||
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Hipparionini indet.
Quinn 1955
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| "Nannippus" - not clear what this is, specimen is an undiagnostic m3: JA pers. obs. 11.12.94 | ||||||||||
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Mammalia
- Megalonychidae
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Megalonychidae indet.
Gervais 1855
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| mentioned by Hoffmeister 1945; Hirschfeld and Webb 1968; Marshall et al. 1979; Hirschfeld 1981 | ||||||||||
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Gastropoda
- Heterostropha
- Lymnaeidae
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Lymnaea filocosta
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Firby 1967 | |||||||||
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Lymnaea sp.
Lamarck 1799
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Firby 1967 | |||||||||
| "compare L. kerri" | ||||||||||
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Gastropoda
- Heterostropha
- Agriolimacidae
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Deroceras pachyostracon
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Firby 1967 | |||||||||
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Bivalvia
- Unionida
- Unionidae
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Anodonta nuttalliana
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Firby 1967 | |||||||||
| subsp. lignitica; rare; listed under equivalent site number UCMP B7270 | ||||||||||
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Bivalvia
- Cardiida
- Sphaeriidae
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Sphaerium cynodon
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Firby 1967 | |||||||||
| abundant; listed under equivalent site number UCMP B7270 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | California | County: | Contra Costa |
| Coordinates: | 37.9° North, 122.1° West (view map) | ||||
| Paleocoordinates: | 37.4° North, 119.6° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | small collection |
Time
| Period: | Neogene | ||
| 10 m.y. bin: | Cenozoic 6 | ||
| *Period: | Tertiary | *Epoch: | Miocene |
| Key time interval: | Hemphillian | ||
| Age range of interval: | 9.40000 - 4.70000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Garrity | ||||
| Local order: | bottom to top | ||||
| Stratigraphy comments: referred to the Orinda Fm. by Stirton but to the Mulholland Fm. by Creely et al. 1982; not directly superposed above the Orinda/Moraga/Siesta sites contra Tedford et al. 1987, but a lateral equivalent of the Bald Peak Basalt, which overlies the Siesta Fm. (Creely et al. 1982) and is dated at 7.7 (=7.91) Ma (KA on olivine: Evernden et al. 1964) superposed above the undifferentiated Contra Costa Group, including Bolinger Canyon and other "Orinda" sites of Stirton. As discussed in Martin et al. 2023, revised stratigraphy of area by Wagner et al. 2021 places locality in the Garrity Formation, which overlies the Mulholland members of the Siesta Formation and is stratigraphically above the UCMP V3611 occurs above the Crow Canyon (8.2 Ma, Ar/Ar) and Bolinger Canyon (8.1 Ma Ar/Ar) and below the San Pablo Dam Tuff (7.8 Ma Ar/Ar). | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | UCMP |
Metadata
| Database number: | 19447 | ||
| Authorizer: | J. Alroy, P. Holroyd | Enterer: | J. Alroy, P. Holroyd |
| Modifier: | P. Holroyd | Research group: | vertebrate |
| Created: | 1995-03-26 00:00:00 | Last modified: | 2023-04-13 22:43:55 |
| Access level: | the public | Released: | 1995-03-26 00:00:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 3233. | R. A. Stirton. 1939. Cenozoic Mammal Remains From the San Francisco Bay Region. University of California Publications, Bulletin of the Department of Geological Sciences 24(13):339-410 [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] | |
| 1287 | S. Creely, D. E. Savage, and B. A. Ogle. 1982. Stratigraphy of upper Tertiary nonmarine rocks of central Contra Costa Basin, California. In R. V. Ingersoll, M. O. Woodburne (eds.), Cenozoic Nonmarine deposits of California and Arizona 11 [J. Alroy/J. Alroy/M. Uhen] | |
| 75495 | J. R. Firby. 1967. Pliocene non-marine mollusks from Contra Costa County, California. Proceedings of the California Academy of Sciences 34(14):511-524 [P. Holroyd/P. Holroyd] | |
| 1920 | D. F. Hoffmeister. 1945. Cricetine Rodents of the Middle Pliocene of the Mulholland Fauna, California. Journal of Mammalogy 26:186-191 [J. Alroy/J. Alroy/J. Ju] | |
| 84451 | R. A. Martin, T. S. Kelly, and P. Holroyd. 2023. Two Asian cricetodontine-like muroid rodents from the Neogene of western North America. Journal of Paleontology 1-19 [P. Holroyd/P. Holroyd] | |
| 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] |