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 (47.8 - 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
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
| Osteichthyes | |
| Actinopteri | |
Laytonia zemorrensis n. sp.1
Laytonia zemorrensis n. sp.1 David 1948 | |
"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus
"Hemiexocoetus eocenicus" = Eoexocoetus eocenicus David 1946 | |
|
Parapolymixia californica David 1946 beardfish | |
Amblygoniolepidus polystichus n. gen. n. sp.2, Promacrurus zemorrianus n. sp.2, Homeonezumia multispinosus n. gen. n. sp.2
| |