Vallecito Creek (CU 47) ( of the United States)

Where: San Diego County, California (32.9° N, 117.1° W: paleocoordinates 32.7° N, 116.1° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Huesos/Tapiado Member (Palm Spring Formation), Blancan (4.9 - 1.8 Ma)

• said to be Blancan

Environment/lithology: terrestrial

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 20115: authorized by John Alroy, entered by John Alroy on 21.09.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• originally described by Downs and White 1968
the Vallecito Creek interval is said to span the upper 1267 m of the section or "CU 47.0-66.9," which implies about 63.4 m per CU; however, a figure of 61 m per CU is given elsewhere in the text; 63.4 m per CU is used here
spans the C2r.1r - C2An.1n transition (2.581 Ma: Cande and Kent 1995); this is confirmed by a date of 2.3 +/- 0.2 Ma (FT on "ash") for the top of the Arroyo Seco interval mentioned by Lundelius et al. 1987
Mammalia
 Rodentia - Erethizontidae
Erethizon bathygnathum Wilson 1935 North American porcupine
 Rodentia - Sciuridae
Spermophilus sp. Cuvier 1825 ground squirrel
 Rodentia - Geomyidae
Geomyidae indet. Bonaparte 1845 pocket gopher
Nerterogeomys garbanii White and Downs 1961 pocket gopher
Nerterogeomys anzensis Becker and White 1981 pocket gopher
 Rodentia - Heteromyidae
Dipodomys compactus True 1889 Gulf Coast kangaroo rat
Dipodomys hibbardi Zakrzewski 1981 kangaroo rat
Perognathinae indet. Coues 1875 rodent
 Rodentia - Cricetidae
Hodomys sp. Merriam 1894 mouse
"Neotoma (Hodomys) sp."
 Lagomorpha - Leporidae
Pewelagus dawsonae White 1984 rabbit
Sylvilagus hibbardi White 1984 cottontail rabbit
 Perissodactyla - Tapiridae
Tapirus sp. Brisson 1762 tapir
 Perissodactyla - Equidae
"Equus sp." = Equus, "Equus (Dolichohippus) sp." = Equus
"Equus sp." = Equus Linnaeus 1758 horse
"Equus (Dolichohippus) sp." = Equus Linnaeus 1758 horse
 Artiodactyla - Tayassuidae
Platygonus sp. Leconte 1848 peccary
 Artiodactyla - Camelidae
Camelops sp. Leidy 1854 camel
Hemiauchenia sp. Gervais and Ameghino 1880 camel
 Artiodactyla - Antilocapridae
Capromeryx sp. Matthew 1902 pronghorn
 Carnivora - Canidae
Canis rufus Audubon and Bachman 1851 red wolf
 Megatherioidea - Megalonychidae
Megalonyx sp. Harlan 1825 edentate
  - Mylodontidae
Mylodontidae indet. Ameghino 1889 edentate