UCMP 790 (Paleocene of the United States)

Where: Lake County, California (38.9° N, 122.6° W: paleocoordinates 44.8° N, 100.3° W)

• coordinate based on nearby landmark

When: Martinez Formation, Paleocene (66.0 - 56.0 Ma)

• Martinez Fm. discussed as Eocene by Dickerson 1914, but rocks now regarded as Paleocene following Stewart, Ralph, 1949, Lower Tertiary stratigraphy of Mount Diablo, Marysville Buttes, and west border of lower Central Valley of California: U.S. Geological Survey Oil and Gas Investigations Preliminary Chart, OC-34.

Environment/lithology: marine; lithology not reported

Size classes: macrofossils, mesofossils

Reposited in the UCMP

Primary reference: R. E. Dickerson. 1914. Fauna of the Martinez Eocene of California. Bulletin of the Department of Geology, University of California 6:61-180 [P. Holroyd/P. Holroyd/A. Hendy]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 190798: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017, edited by Susan Tremblay and Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

 Arcida - Glycymerididae
"Glycimeris veatchii" = Axinaea veatchii
"Glycimeris veatchii" = Axinaea veatchii Gabb 1864 clam
 Arcida - Cucullaeidae
Cucullaea mathewsonii Gabb 1864 clam
 Pectinida - Pectinoidae
Pecten sp. Müller 1776 scallop
 Pectinida - Limidae
"Lima multiradiata" = Acesta (Acesta) multiradiata
"Lima multiradiata" = Acesta (Acesta) multiradiata Gabb 1868 file clam
 Pectinida - Plicatulidae
"Plicatula ostreiformis" = Plicatula (Plicatula) ostreiformis2 Stanton 1896 scallop
 Ostreida - Ostreidae
"Ostraea buwaldana" = Ostrea, Ostraea weaveri
"Ostraea buwaldana" = Ostrea oyster
Ostraea weaveri Dickerson 1914 oyster
 Mytilida - Mytilidae
Modiolus ornatus Gabb 1864 mussel
 Carditida - Crassatellidae
 Cardiida - Mactridae
? Mactra tenuissima Gabb 1868 clam
 Cardiida - Veneridae
? Venus sp. Linnaeus 1758 venus clam
? Paphia clarki Dickerson 1914 venus clam
Meretrix stantoni Dickerson 1914 venus clam
Meretrix dalli n. sp. Dickerson 1914 venus clam
 Cardiida - Tellinidae
"? Tellina undulifera" = Saulella undulifera Gabb 1868 tellin clam
Tellina "sp. a" Linnaeus 1758 tellin clam
Tellina cf. parilis Gabb 1864 tellin clam
Tellina packardi Dickerson 1914 tellin clam
"Tellina kewi" = Tellina (Megangulus) kewi Dickerson 1914 tellin clam
 Cardiida - Psammobiidae
"Psammobia hornii" = Gari (Gobraeus) hornii
"Psammobia hornii" = Gari (Gobraeus) hornii Gabb 1864 clam
 Solenida - Solenidae
Solen sp. Linnaeus 1758 clam
 Lucinida - Lucinidae
 Protobranchia - Nuculanidae
"Leda gabbi" = Nuculana (Saccella) gabbii Conrad 1869 pointed nut clam
"Leda packardi" = Saccella packardi Forbes 1848 pointed nut clam
Leda alaeformis Gabb 1868 pointed nut clam
 Protobranchia - Yoldiidae
Yoldia gesteri Dickerson 1914 clam
 Ptenoglossa - Epitoniidae
Acrilla (Undiscala) lolakensis n. sp.1 Durham 1937 wentletrap
 Patellogastropoda - Lottiidae
Acmaea martinezensis n. sp. Dickerson 1914 limpet
 Opisthobranchia - Cylichnidae
Cylichna sp., "Cylichna costata" = Scaphander costatus
Cylichna sp. Lovén 1846 snail
"Cylichna costata" = Scaphander costatus Gabb 1864 snail
 Neogastropoda - Buccinidae
Neptunea sp. Röding 1798 true whelk
"Brachysphingus liratus" = Brachysphingus sinuatus Gabb 1868 true whelk
 Neogastropoda - Tudiclidae
Heteroterma sp. Gabb 1868 snail
 Stromboidea - Strombidae
Fusus dumblei n. sp. Dickerson 1914 true conch
 Stromboidea - Seraphsidae
? Seraphs thompsoni Dickerson 1914 snail
 Ficoidea - Ficidae
"Urosyca caudata" = Priscoficus caudatus Gabb 1868 fig shell
 Naticoidea - Naticidae
Lunatia "sp. A" Gray 1847 moon snail
"Lunatia hornii" = Polinices (Euspira) hornii Gabb 1864 moon snail
"Lunatia cf. nuciformis" = Polinices (Euspira) nuciformis Gabb 1864 moon snail
Naticia (Gyrodes) lineata Dickerson 1914 moon snail
 Calyptraeoidea - Calyptraeidae
Galerus excentricus Gabb 1864 slipper shell
 Tonnoidea - Ranellidae
? Tritonium buwaldi n. sp. Dickerson 1914 triton
 Heterostropha - Acteonidae
"Ringinella pinguis" = Tornatellaea pinguis
"Ringinella pinguis" = Tornatellaea pinguis Gabb 1864 snail
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Dentalium stramineum Gabb 1864 tusk shell
Dentalium cooperi Gabb 1864 tusk shell
Chondrichthyes indet. Huxley 1880 cartilaginous fish
shark tooth