Western Gulf Oil Company, Lillis Welch No. 1 (Eocene to of the United States)

Where: Fresno County, California (36.6° N, 120.5° W: paleocoordinates 36.4° N, 108.1° W)

• coordinate stated in text

When: Kreyenhagen Formation, Middle Eocene to Middle Eocene (48.6 - 33.9 Ma)

• Fossils from 1087 to 2100 feet below surface. Age listed in David 1946 as "Eogene" reflecting the author's interpretation of the age of the rocks as late Eocene to potentially early Oligocene. Formation as a whole now regarded as late middle Eocene to Eocene (see chapters in USGS Professional Paper 1713).

Environment/lithology: marine; shale

Size class: mesofossils

Preservation: mold/impression

Primary reference: L. R. David. 1946. Some typical Upper Eocene fish scales from California. Contributions to Paleontology, Carnegie Institute of Washington Publication 551:47-112 [P. Holroyd/P. Holroyd]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191014: authorized by Patricia Holroyd, entered by Patricia Holroyd on 04.01.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

 Polymixiiformes - Polymixiidae
Parapolymixia californica n. gen. n. sp. David 1946 beardfish
stated range: 1087-1106 feet
 Beloniformes - Scomberesocidae
Praescomberesox pacificus David 1946
stated range: 1748-1761 feet
 Beloniformes - Hemiramphidae
"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus
"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus David 1946
stated range: 1087-1859 feet and lower
 Carangiformes - Carangidae
Caranx orolomaensis David 1946
stated range: 1579-1605 feet
 Gadiformes - Bregmacerotidae
Bregmaceros kreyenhagus David 1946
stated range: 2082-2100 feet
 Isospondyli - Cyclolepidae
Cyclolepoides tuberculatus n. gen. n. sp. David 1946
stated range: 1087-1858 feet