UCMP 714, Riggs Canyon (Eocene of the United States)

Where: Contra Costa County, California (37.8° N, 121.9° W: paleocoordinates 37.4° N, 109.8° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Upper Member (Tejon Formation), Bartonian (41.3 - 38.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

Size class: macrofossils

Primary reference: J. O. Nomland. 1916. Corals from the Cretaceous and Tertiary of California and Oregon. Bulletin of the Department of Geology, University of California Publications 9(5):59-76 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 122336: authorized by Wolfgang Kiessling, entered by Uta Merkel on 21.12.2011, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
 Scleractinia - Dendrophylliidae
Balanophyllia variabilis n. sp. Nomland 1916 stony coral
Gastropoda
 Cerithioidea - Turritellidae
Turritella uvasana Conrad 1855 turret shell
Bivalvia
 Cardiida - Veneridae
"Meretrix hornii" = Macrocallista (Costacallista) hornii Gabb 1864 venus clam
 Cardiida - Cardiidae
"Cardium cooperii" = Nemocardium (Nemocardium) linteum
"Cardium cooperii" = Nemocardium (Nemocardium) linteum Conrad 1855 cockle
 Carditida - Carditidae
"Venericardia planicosta" = Venericor planicosta
"Venericardia planicosta" = Venericor planicosta Lamarck 1801 clam
as Venericardia planicosta hornii