Vallecito Creek (CU 57): Irvingtonian, California

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Megalonychidae
Megalonyx sp. Harlan 1825
Mammalia - Proboscidea - Mammutidae
Mammut americanum (Kerr 1792)
also referred to as Mammut cf. americanum
    = Mammut pacificus Dooley et al. 2019
Dooley et al. 2019
not specifically referred to by Dooley (2019), but they said all M. americanum in California belongs to M. pacificus
Mammalia - Carnivora - Ursidae
Tremarctos sp. Gervais 1855
Mammalia - Perissodactyla - Equidae
Equus (Equus) sp. Linnaeus 1758
Equus (Dolichohippus) sp. (Heller 1912)
synonym of Equus
Equus simplicidens Cope 1892
recombined as Plesippus simplicidens
Mammalia - Camelidae
Hemiauchenia sp. Gervais and Ameghino 1880
Titanotylopus sp. Barbour and Schultz 1934
Camelops sp. Leidy 1854
Mammalia - Cervidae
Odocoileus sp. Rafinesque 1832
Navahoceros sp. Kurten 1975
nomen nudum belonging to Odocoileus
said to be new
Mammalia - Antilocapridae
Capromeryx sp. Matthew 1902
Mammalia - Talpidae
Scapanus sp. Pomel 1848
Scapanus malatinus Hutchison 1987
Mammalia - Soricidae
Notiosorex jacksoni Hibbard 1950
Mammalia - Lagomorpha - Leporidae
Sylvilagus sp. Gray 1867
Sylvilagus hibbardi White 1984
Sylvilagus floridanus (Allen 1890)
Mammalia - Rodentia - Cricetidae
Calomys (Bensonomys) sp. (Gazin 1942)
original and current combination Bensonomys
CU 57.8
Onychomys sp. Baird 1858
Peromyscus sp. Gloger 1841
Sigmodon sp. Say and Ord 1825
Sigmodon lindsayi Martin and Prince 1989
CU 57.7
Hodomys sp. Merriam 1894
"Neotoma (Hodomys) sp."
Mictomys anzensis
    = Mictomys vetus Wilson 1933
Alroy 2002
(sic): probably includes "Synaptomys anzaensis" "M. type of Zakrzewski 1972 from LACM 6683, which is "109 m... above the Olduvai event" according to Repenning 1992
Microtus californicus (Peale 1848)
CU 57.8: described by Zakrzewski 1972; present at LACM 1942, 6683, 6814 (1 measurement)
    = Arvicolinae indet. Gray 1821
Bell and Bever 2006
one specimen is "not sufficiently diagnostic to permit definitive identification" as Microtus, and the other "has compromised locality data and can no longer be accepted as a temporally secure record"
Reithrodontomys sp. Giglioli 1874
Baiomys sp. True 1894
Mammalia - Rodentia - Sciuridae
Spermophilus sp. Cuvier 1825
Mammalia - Rodentia - Geomyidae
Geomys sp. Rafinesque 1817
    = Geomyidae indet. Bonaparte 1845
Alroy 2002
Geomys garbanii White and Downs 1961
    = Nerterogeomys garbanii White and Downs 1961
Alroy 2002
Geomys anzensis Becker and White 1981
    = Nerterogeomys anzensis Becker and White 1981
Alroy 2002
Mammalia - Rodentia - Heteromyidae
Dipodomys sp. Gray 1841
"n. sp. A"
Dipodomys compactus True 1889
Perognathus sp. Maximillian 1839
    = Perognathinae indet. Coues 1875
Alroy 2002
see common names

Geography
Country:United States State/province:California County:San Diego
Coordinates: 32.9° North, 117.1° West (view map)
Paleocoordinates:32.9° North, 116.8° West
Basis of coordinate:based on political unit
Geographic resolution:small collection
Time
Period:Quaternary Epoch:Pleistocene
10 m.y. bin:Cenozoic 6
*Local age/stage:Irvingtonian
Key time interval:Irvingtonian
Age range of interval:1.40000 - 0.21000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Palm Spring Member:Huesos/Tapiado
Local section:FCVC Local bed:3699
Local order:bottom to top
Stratigraphy comments: said to be Irvingtonian
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:may include "Mimomys" parvus and Terricola meadensis of Repenning 1992
Metadata
Database number:20125
Authorizer:J. Alroy, M. Uhen Enterer:J. Alroy, M. Uhen
Modifier:J. Alroy Research group:vertebrate
Created:1999-09-21 00:00:00 Last modified:2009-07-15 19:05:39
Access level:the public Released:1999-09-21 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
1186. M. L. Cassiliano. 1999. Biostratigraphy of Blancan and Irvingtonian mammals in the Fish Creek-Vallecito Creek section, southern California, and a review of the Blancan-Irvingtonian boundary. Journal of Vertebrate Paleontology 19(1):169-186 [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]
27859 C. J. Bell and G. S. Bever. 2006. Description and significance of the Microtus (Rodentia : Arvicolinae) from the type Irvington fauna, Alameda County, California. Journal of Vertebrate Paleontology 26(2):371-380 [J. Alroy/J. Alroy]
35474 A. C. Dooley, E. Scott, J. Green, K. B. Springer, B. S. Booley and G. J. Smith. 2019. Mammut pacificus sp. nov., a newly recognized species of mastodon from the Pleistocene of western North America. PeerJ 7:e6614 [M. Uhen/M. Uhen/M. Uhen]