Vallecito Creek (CU 57) (Pleistocene of the United States)

Where: San Diego County, California (32.9° N, 117.1° W: paleocoordinates 32.9° N, 116.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Huesos/Tapiado Member (Palm Spring Formation), Irvingtonian (1.8 - 0.3 Ma)

• said to be Irvingtonian

Environment/lithology: terrestrial

Size classes: macrofossils, mesofossils

Primary reference: 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]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 20125: authorized by John Alroy, entered by John Alroy on 21.09.1999, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

• may include "Mimomys" parvus and Terricola meadensis of Repenning 1992
Mammalia
 Rodentia - Cricetidae
"Calomys (Bensonomys) sp." = Bensonomys Gazin 1942 mouse
CU 57.8
Reithrodontomys sp. Giglioli 1874 harvest mouse
Sigmodon sp. Say and Ord 1825 cotton rat
Sigmodon lindsayi Martin and Prince 1989 cotton rat
CU 57.7
Baiomys sp. True 1894 pygmy mouse
Arvicolinae indet.2 Gray 1821 vole
CU 57.8: described by Zakrzewski 1972; present at LACM 1942, 6683, 6814
Hodomys sp. Merriam 1894 mouse
"Neotoma (Hodomys) sp."
Mictomys vetus1 Wilson 1933 bog lemming
Peromyscus sp. Gloger 1841 deer mouse
Onychomys sp. Baird 1858 grasshopper mouse
 Rodentia - Sciuridae
Spermophilus sp. Cuvier 1825 ground squirrel
 Rodentia - Geomyidae
Geomyidae indet.1 Bonaparte 1845 pocket gopher
Nerterogeomys anzensis1 Becker and White 1981 pocket gopher
Nerterogeomys garbanii1 White and Downs 1961 pocket gopher
 Rodentia - Heteromyidae
Perognathinae indet.1 Coues 1875 rodent
Dipodomys sp. Gray 1841 kangaroo rat
"n. sp. A"
Dipodomys compactus True 1889 Gulf Coast kangaroo rat
 Lagomorpha - Leporidae
Sylvilagus sp. Gray 1867 cottontail rabbit
Sylvilagus floridanus Allen 1890 eastern cottontail
Sylvilagus hibbardi White 1984 cottontail rabbit
 Lipotyphla - Talpidae
Scapanus sp. Pomel 1848 mole
Scapanus malatinus Hutchison 1987 mole
 Perissodactyla - Equidae
Equus (Equus) sp. Linnaeus 1758 horse
Equus (Dolichohippus) sp. Heller 1912 horse
"Equus simplicidens" = Equus (Dolichohippus) simplicidens Cope 1892 horse
 Tribosphenida - Soricidae
Notiosorex jacksoni Hibbard 1950 gray shrew
 Carnivora - Ursidae
Tremarctos sp. Gervais 1855 bear
 Xenarthra - Megalonychidae
Megalonyx sp. Harlan 1825 edentate
 Proboscidea - Mammutidae
Mammut pacificus3 Dooley et al. 2019 mastodon
also referred to as Mammut cf. americanum
 Ungulata - Camelidae
Titanotylopus sp. Barbour and Schultz 1934 camel
Camelops sp. Leidy 1854 camel
Hemiauchenia sp. Gervais and Ameghino 1880 camel
 Ungulata - Cervidae
Odocoileus sp. Rafinesque 1832 New World deer
Navahoceros sp. Kurten 1975 New World deer
said to be new
 Ungulata - Antilocapridae
Capromeryx sp. Matthew 1902 pronghorn