Where: San Mateo County, California (37.2° N, 122.4° W: paleocoordinates 43.5° N, 92.1° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Pigeon Point Formation, Middle Campanian (83.5 - 70.6 Ma)
• bed-level stratigraphic resolution
Environment/lithology: transition zone or lower shoreface; lithified sandstone
Size class: macrofossils
Preservation: mold/impression
Reposited in the USNM
Primary reference: W. P. Elder and L. R. Saul. 1993. Paleogeographic implications of molluscan assemblages in the Upper Cretaceous (Campanian) Pigeon Point Formation, California. In G. Dunn, K. McDougall (eds.), Mesozoic Paleogeography of the Western United States - II. Pacific Section SEPM Book 71:171-186 [M. Clapham/M. Clapham/M. Clapham]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 144777: authorized by Matthew Clapham, entered by Matthew Clapham on 17.05.2013
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
"Lysis duplicostata" = Lysis duplicosta
"Lysis duplicostata" = Lysis duplicosta Gabb 1864 snail |