UCMP 784 (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 190795: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Terebratulida - Cancellothyrididae
 Arcida - Glycymerididae
"Glycimeris veatchii" = Axinaea veatchii
"Glycimeris veatchii" = Axinaea veatchii Gabb 1864 clam
 Arcida - Cucullaeidae
Cucullaea mathewsonii Gabb 1864 clam
 Ostreida - Ostreidae
"Ostraea buwaldana" = Ostrea
"Ostraea buwaldana" = Ostrea oyster
 Mytilida - Mytilidae
Modiolus ornatus Gabb 1864 mussel
 Pholadida - Pholadidae
? Martesia sp. Sowerby 1824 clam
 Cardiida - Mactridae
? Mactra tenuissima Gabb 1868 clam
 Cardiida - Veneridae
Tapes cf. quadrata Gabb 1864 venus clam
? Paphia clarki Dickerson 1914 venus clam
? Macrocallista packi Dickerson 1914 venus clam
Meretrix stantoni Dickerson 1914 venus clam
Meretrix dalli Dickerson 1914 venus clam
 Cardiida - Tellinidae
Tellina perrini Dickerson 1914 tellin clam
Tellina cf. parilis Gabb 1864 tellin clam
Tellina packardi Dickerson 1914 tellin clam
Tellina herndonensis n. sp. 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
Lucina sp. Bruguière 1797 clam
Phacoides quadrata n. sp. Dickerson 1914 clam
 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
 Neogastropoda - Buccinidae
"Brachysphingus liratus" = Brachysphingus sinuatus, ? Siphonalia lineata
"Brachysphingus liratus" = Brachysphingus sinuatus Gabb 1868 true whelk
 Neogastropoda - Tudiclidae
Heteroterma striata Stanton 1896 snail
 Stromboidea - Seraphsidae
Seraphs thompsoni n. sp. Dickerson 1914 snail
 Ficoidea - Ficidae
"Urosyca caudata" = Priscoficus caudatus Gabb 1868 fig shell
Urosyca robusta Weaver 1905 fig shell
 Naticoidea - Naticidae
"Lunatia hornii" = Polinices (Euspira) hornii Gabb 1864 moon snail
Amauropsis cf. martinezensis Dickerson 1914 moon snail
Natica (Gyrodes) lineata Dickerson 1914 moon snail
 Heterostropha - Acteonidae
"Ringinella pinguis" = Tornatellaea pinguis
"Ringinella pinguis" = Tornatellaea pinguis Gabb 1864 snail
 Dentaliida - Dentaliidae
Dentalium stramineum Gabb 1864 tusk shell
 Cidaroida - Cidaridae
"Cidaris merriami" = Hesperocidaris merriami
"Cidaris merriami" = Hesperocidaris merriami Arnold 1908 pencil urchin