Lake Murray (LACM 1723) (Eocene of the United States)

Where: San Diego County, California (32.9° N, 117.1° W: paleocoordinates 33.1° N, 103.9° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Mission Valley Formation, Early/Lower Uintan (46.2 - 39.7 Ma)

• Poway Formation according to Howard 1965

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; sandy siltstone

• Protostrix fossil is from "one of many chunks of 'arkosic' sandy matrix... in [a] 6-12 inch lens of sandy silt, 3 ft. below conglomerate" (Howard 1965)

Size class: macrofossils

Reposited in the LACM

Collection methods: salvage, quarrying

• "excavated in 1962 by Mr. F. A. Tyler of San Diego from a road excavation in a new housing development"

Primary reference: D. J. Golz and J. A. Lillegraven. 1977. Summary of known occurrences of terrestrial vertebrates from Eocene strata of southern California. Contributions to Geology, University of Wyoming 15(1):43-65 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 16692: authorized by John Alroy, entered by John Alroy on 18.02.1993, edited by Patricia Holroyd

Creative Commons license: CC BY (attribution)

Taxonomic list

Aves
 Strigiformes - Protostrigidae
Protostrix californiensis n. sp. Howard 1965 owl
Reptilia
 Squamata - Boidae
Boidae indet. Gray 1825 boa
Mammalia
 Insectivora -
Insectivora indet. Bowdich 1821 insectivoran
 Artiodactyla - Agriochoeridae
Protoreodon cf. parvus Scott and Osborn 1887 agriochoerid
 Artiodactyla - Oromerycidae
? Protylopus sp. Wortman 1898 even-toed ungulate
 Theriamorpha - Sespedectidae
cf. Proterixoides sp. Stock 1935 placental
 Rodentia - Ischyromyidae
Eohaplomys sp. Stock 1935 rodent
said by Walsh 1991 to be a new species
 Primates - Omomyidae
Omomyidae indet. Gazin 1958 tarsier