USGS Cenozoic M2050 San Luis Obispo (Miocene of the United States)

Also known as UCMP IP7046

Where: Monterey County, California (35.7° N, 120.8° W)

• Paleocoordinates: 36.9° N, 118.3° W (Wright 2013)

• coordinate stated in text

When: Pancho Rico Formation, Messinian (7.2 - 5.3 Ma)

• Described in reference as Pliocene. Pancho Rico Formation is Miocene per Addicott 1978 (Geological Survey Bulletin, Issue 1457). AGE: Revised to Messian consistent with EPICC stratigraphic revision [A. Hendy, 06/2020].

Environment/lithology: marine; lithology not reported

• relatively thin sequence of coarse-grained clastic rocks containing abundant mollusks indicative of shallow water.

Size class: macrofossils

Collected by D. L Durham, W. O. Addicott in 1964

Primary reference: D. L. Durham and W. O. Addicott. 1965. Pancho Rico Formation, Salinas Valley. United States Geological Survey Professional Paper 524(A):A1-A22 [P. Holroyd/S. Tremblay]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 195034: authorized by Patricia Holroyd, entered by Susan Tremblay on 12.07.2018

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Cardiida - Veneridae
"Protothaca sp." = Leukoma
"Protothaca sp." = Leukoma Römer 1857 venus clam
 Cardiida - Mactridae
Spisula sp.
Spisula sp. Gray 1837 clam
 Cardiida - Tellinidae
"Florimetis biangulata" = Leporimetis obesa, "? Macoma indentata" = Macoma (Rexithaerus) indentata, Macoma nasuta
"Florimetis biangulata" = Leporimetis obesa Deshayes 1855 yellow apolymetis
"? Macoma indentata" = Macoma (Rexithaerus) indentata Carpenter 1864 indented macoma
Macoma nasuta Conrad 1837 bent-nose clam
 Pholadida - Myidae
Cryptomya californica
Cryptomya californica Conrad 1837 California softshell
 Solenida - Solenidae
"? Solen perrini" = Solena (Eosolen) perrini
"? Solen perrini" = Solena (Eosolen) perrini Clark 1915 razor clams
 Pectinida - Pectinoidae
"Lyropecten estrellanus" = Nodipecten estrellanus
"Lyropecten estrellanus" = Nodipecten estrellanus Conrad 1856 scallop
 Arcida - Glycymerididae
Glycymeris sp.
Glycymeris sp. Da Costa 1778 bittersweet clam
 Mytilida - Mytilidae
Modiolus sp.
Modiolus sp. Lamarck 1801 horsemussel
Gastropoda
 Neotaenioglossa - Calyptraeidae
Crepidula adunca, Calyptraea filosa
Crepidula adunca Sowerby 1824 hooked slippersnail
Calyptraea filosa Gabb 1866 Chinese hat snail
 Neogastropoda - Nassariidae
"Nassarius aff. californianus" = Caesia californiana
"Nassarius aff. californianus" = Caesia californiana Conrad 1856 snail
 Neogastropoda - Buccinidae
Calicantharus cf. fortis
Calicantharus cf. fortis Carpenter 1866 true whelk
 Neogastropoda - Drilliidae
Clavus coalingensis
Clavus coalingensis Arnold 1909 snail
 Neogastropoda - Pseudomelatomidae
Crassispira "n. sp.? aff. martinensis"
 Sorbeoconcha - Naticidae
"Polinices lewisii" = Euspira lewisii
"Polinices lewisii" = Euspira lewisii Gould 1847 Lewis's moon snail
misspelled as "Polinices lewisi"
 Sorbeoconcha - Procerithiidae
"? Bittium casmaliense" = Lirobittium casmaliense
"? Bittium casmaliense" = Lirobittium casmaliense Bartsch 1911 snail
 Cerithioidea - Turritellidae
Turritella gonostoma, Turritella cooperi
Turritella gonostoma Valenciennes 1832 turret shell
hemphilli
Turritella cooperi Carpenter 1864 symmetrical turretsnail
 Trochoidea - Trochidae
"Margarites cf. condoni" = Margarites (Lirularia) condoni
"Margarites cf. condoni" = Margarites (Lirularia) condoni Dall 1909 top snail