UCMP 1556 (Paleocene of the United States)

Where: Contra Costa County, California (38.0° N, 122.2° W: paleocoordinates 43.9° N, 100.0° 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 190778: authorized by Patricia Holroyd, entered by Patricia Holroyd on 17.12.2017, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

Anthozoa
 Scleractinia - Flabellidae
"Flabellum remondianum" = Flabellum cuneiforme
"Flabellum remondianum" = Flabellum cuneiforme Lonsdale 1845 stony coral
Rhynchonellata
 Terebratulida - Terebratulidae
? Terebratula sp. Müller 1776
Bivalvia
 Nuculanida - Nuculanidae
"Leda milleri" = Nuculana (Saccella) denominata Hanna 1924 pointed nut clam
"Leda gabbi" = Nuculana (Saccella) gabbii Conrad 1866 pointed nut clam
 Nuculida - Nuculidae
"Nucula (Acila) sp." = Acila
"Nucula (Acila) sp." = Acila Adams and Adams 1858 divaricate nutclam
 Mytilida - Mytilidae
"Modiolus bakeri" = Idasola bakeri, Modiolus ornatus, "Mytilus cf. ascia" = Mytilus (Mytilus) ascia
"Modiolus bakeri" = Idasola bakeri Dickerson 1914 mussel
Modiolus ornatus Gabb 1864 mussel
"Mytilus cf. ascia" = Mytilus (Mytilus) ascia Gabb 1864 mussel
 Ostreida - Ostreidae
Ostrea sp. Linnaeus 1758 oyster
 Pectinida - Limidae
"Lima cf. multiradiata" = Acesta (Acesta) multiradiata
"Lima cf. multiradiata" = Acesta (Acesta) multiradiata Gabb 1869 file clam
 Pectinida - Pectinoidae
Pectinidae indet. Wilkes 1810 scallop
as "Pecten, sp., a"
 Arcida - Glycymerididae
Glycymerita major Stanton 1896 clam
 Arcida - Cucullaeidae
Cucullaea mathewsonii Gabb 1864 clam
 Carditida - Carditidae
"Cardita veneriformis" = Centrocardita veneriformis
"Cardita veneriformis" = Centrocardita veneriformis Gabb 1864 clam
 Poromyida - Cuspidariidae
"Cuspidaria dolabraeformis" = Cardiomya dolabraeformis
"Cuspidaria dolabraeformis" = Cardiomya dolabraeformis Gabb 1864 clam
 Pholadomyida - Pholadomyidae
Pholadomya nasuta Gabb 1864 clam
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
 Cardiida - Tellinidae
"Tellina undulifera" = Tellina (Saulella) undulifera Gabb 1869 tellin clam
Tellina cf. aequalis Gabb 1869 tellin clam
 Cardiida - Mactridae
"Spisula weaveri n. sp." = Mactromeris weaveri
"Spisula weaveri n. sp." = Mactromeris weaveri Dickerson 1914 clam
 Cardiida - Veneridae
? Paphia clarki Dickerson 1914 venus clam
Meretrix stantoni Dickerson 1914 venus clam
"? Tapes quadrata" = Pitar quadratus Gabb 1864 venus clam
 Pholadida - Teredinidae
Teredo sp. Linnaeus 1758 clam
 Pholadida - Pholadidae
? Zirphaea sp. Gray 1840 clam
 Pholadida - Corbulidae
Corbula sp. Bruguière 1789 clam
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Dentalium cooperi Gabb 1864 tusk shell
Gastropoda
 Opisthobranchia - Cylichnidae
"Cylichna costata" = Scaphander (Mirascapha) costatus
"Cylichna costata" = Scaphander (Mirascapha) costatus Gabb 1864 snail
 Architaenioglossa - Ampullinidae
Ampullina striata Gabb 1869 snail
 Sorbeoconcha - Ficidae
Urosyca caudata Gabb 1869 fig shell
 Neogastropoda - Muricidae
"Perissolax tricarnatus" = Pseudoperissolax tricarnatus
"Perissolax tricarnatus" = Pseudoperissolax tricarnatus Weaver 1905 murex snail
 Neogastropoda - Pyropsidae
"Heteroterma striata" = Pyropsis striata
"Heteroterma striata" = Pyropsis striata Stanton 1896 snail
 Neogastropoda - Melongenidae
"Neptunea mucronata" = Sycum mucronatum
"Neptunea mucronata" = Sycum mucronatum Gabb 1869 snail
 Neogastropoda - Nassariidae
? Fusus sp. Bruguière 1789 snail
Fusus sp. Bruguière 1789 snail
 Sorbeoconcha - Xenophoridae
Xenophora zitteli Weaver 1905 carrier shell
 Sorbeoconcha - Ranellidae
Tritonium martinezensis n. sp. Dickerson 1914 triton
 Sorbeoconcha - Naticidae
Natica "sp. a" Scopoli 1777 moon snail
Lacunaria striata Gabb 1869 moon snail
"Lunatia hornii" = Polinices hornii Gabb 1864 moon snail
 Cerithioidea - Turritellidae
Turritella infragranulata Gabb 1864 turret shell
Turritella pachecoensis Stanton 1896 turret shell
Echinoidea
 Cidaroida - Cidaridae
Cidaris sp. Leske 1778 pencil urchin
sp. a and sp. d