Tecopa Lake Beds ( of the United States)

Also known as LACM 1209; LACM 7111; Standing Camel Basin; Tecopa Basin; Tecopa Lake Basin
DUPLICATE REF 2018 or 2019

Where: Inyo County, California (36.0° N, 116.3° W: paleocoordinates 36.1° N, 115.7° W)

• coordinate estimated from map

• local area-level geographic resolution

When: Tecopa Lake Beds Formation, Blancan (4.9 - 1.8 Ma)

• "from several stratigraphic levels... a few meters below the Huckleberry Ridge Tuff (2.1 Ma)" and therefore late Blancan instead of Illinoian, as thought by Jefferson 1991; the date is 2.103 +/- 0.019 Ma (laser fusion Ar/Ar) and derives from Honey et al. 1998 (Whistler and Webb 2005)

• member-level stratigraphic resolution

Environment/lithology: lacustrine; gypsiferous mudstone

• "Deposits comprise a series of lacustrine and marginal fluviatile deposits" (Whistler and Webb 2005)
• "a variety of gypsiferous mudstones, siltstones, and tufa (subaerial and freshwater limestone), with basin marginal deposits of sandstone and conglomerate"; fossils are from a "lake mud" also called an "unctuous... deep clay mire" (Whistler and Webb 2005)

Reposited in the LACM

Primary reference: G. T. Jefferson. 1991. The Camp Cady local fauna; stratigraphy and paleontology of the Lake Manix Basin. San Bernardino County Museum Association Quarterly 38(3):93-99 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 20540: authorized by John Alroy, entered by John Alroy on 07.06.1994

Creative Commons license: CC BY (attribution)

Taxonomic list

Aves
 Phoenicopteriformes - Phoenicopteridae
cf. Phoenicopterus sp. Linnaeus 1758 flamingo
Mammalia
 Rodentia - Cricetidae
Sigmodon sp. Say and Ord 1825 cotton rat
Neotoma sp. Say and Ord 1825 pack rat
Peromyscus sp. Gloger 1841 deer mouse
 Rodentia - Sciuridae
"Spermophilus cf. bensoni" = Citellus (Otospermophilus) bensoni
"Spermophilus cf. bensoni" = Citellus (Otospermophilus) bensoni Gidley 1922 ground squirrel
DUPLICATE REF 2018 or 2019
 Rodentia - Heteromyidae
Dipodomys sp. Gray 1841 kangaroo rat
two species
 Lagomorpha - Leporidae
"Hypolagus cf. limnetus" = Hypolagus edensis
"Hypolagus cf. limnetus" = Hypolagus edensis Frick 1921 rabbit
 Perissodactyla - Equidae
Equus sp. Linnaeus 1758 horse
large and small DUPLICATE REF 2018 or 2019
 Tribosphenida - Soricidae
Sorex sp. Linnaeus 1758 long-tailed shrew
Notiosorex sp. Baird 1877 gray shrew
 Carnivora - Canidae
Canidae indet. Fischer 1817 canid
"moderate-sized fox"
 Proboscidea - Mammutidae
Mammutidae indet. Hay 1922 mastodon
"mastodon"
 Proboscidea - Elephantidae
Mammuthus sp. Brookes 1828 mammoth
DUPLICATE REF 2018 or 2019
 Ungulata - Camelidae
Capricamelus gettyi n. gen. n. sp. Whistler and Webb 2005 camel
type is from LACM 7111
Camelops sp. Leidy 1854 camel
cf. Hemiauchenia sp. Gervais and Ameghino 1880 camel
DUPLICATE REF 2018 or 2019
 Ungulata - Cervidae
Cervidae indet. Gray 1821 deer
DUPLICATE REF 2018 or 2019: omitted by Whistler and Webb 2005
 Ungulata - Antilocapridae
Antilocapridae indet. Gray 1866 pronghorn