Texas Company, Pioneer Unit Plan No. 1 (Eocene to of the United States)

Where: Madera County, California (35.0° N, 119.3° W: paleocoordinates 34.8° N, 107.0° W)

• coordinate stated in text

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

• Fossils from 8021 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: basinal (); shale

• abyssal

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 191008: authorized by Patricia Holroyd, entered by Patricia Holroyd on 03.01.2018, edited by Mark Uhen

Creative Commons license: CC BY (attribution)

Taxonomic list

 Notacanthiformes - Halosauridae
Laytonia zemorrensis n. sp.1 David 1948
 Polymixiiformes - Polymixiidae
Parapolymixia californica David 1946 beardfish
 Beloniformes - Hemiramphidae
"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus
"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus David 1946
 Gadiformes - Macrouridae
Promacrurus zemorrianus n. sp.2 David 1956
Homeonezumia multispinosus n. gen. n. sp.2 David 1956
Amblygoniolepidus polystichus n. gen. n. sp.2 David 1956
 Isospondyli - Cyclolepidae