Seaboard Oil Corp.,Gill No. 1 (3935 ft and deeper assemblages) (Eocene to of the United States)

Where: Madera County, California (36.9° N, 120.3° W: paleocoordinates 36.7° N, 107.9° W)

• coordinate stated in text

• hand sample-level geographic resolution

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

• Fossils from 3935 feet and deeper 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 191006: authorized by Patricia Holroyd, entered by Patricia Holroyd on 03.01.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

  - Coregonidae
Parastenodus gillensis n. gen. n. sp.
Parastenodus gillensis n. gen. n. sp. David 1946 bony fish
stated range: 3852-3863 feet
 Polymixiiformes - Polymixiidae
Parapolymixia californica David 1946 beardfish
stated range: 4039 ft and deeper
 Beloniformes - Scomberesocidae
Praescomberesox pacificus n. gen. n. sp. David 1946
stated range: 3895-3907 feet
 Beloniformes - Hemiramphidae
"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus
"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus David 1946
stated range: 4004 feet
 Kurtiformes - Denticidae
Kreyenhagenius joaquinensis n. gen. n. sp. David 1946
stated range 4051 feet
 Clupeiformes - Clupeoidei
Pseudoetringus kreyenhagius David 1946 herring
stated range: 3988-4022 feet
 Isospondyli - Cyclolepidae
Cyclolepoides tuberculatus
stated range: 3935-4002 feet