Arroyo Seco (CU 29) ( 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: Diablo/Olla 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 20098: 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 Arroyo Seco interval is said to span between "2466 and 1267 m (CU 29.0-46.9)," which implies 66.6 m per CU; however, a figure of 61 m per CU is given elsewhere in the text; 66.6 m figure is used here
Show authors, comments, and common names
Mammalia
 Lagomorpha - Leporidae
Pewelagus dawsonae, Nekrolagus sp., Hypolagus vetus
Pewelagus dawsonae White 1984 rabbit
Nekrolagus sp. Hibbard 1939 rabbit
possibly the specimen from LACM 6604 described by White 1984
Hypolagus vetus Kellogg 1910 rabbit
 Rodentia - Cricetidae
Hodomys sp., Peromyscus sp.
Hodomys sp. Merriam 1894 mouse
"Neotoma (Hodomys) sp."
Peromyscus sp. Gloger 1841 deer mouse
 Rodentia - Heteromyidae
Dipodomys hibbardi, Dipodomys compactus, Perognathinae indet.
Dipodomys hibbardi Zakrzewski 1981 kangaroo rat
Dipodomys compactus True 1889 Gulf Coast kangaroo rat
Perognathinae indet. Coues 1875 rodent