Acmaea simplex Dickerson 1917 (limpet)

Gastropoda - Patellida - Lottiidae

Full reference: R. E. Dickerson. 1917. Climate and its influence upon the Oligocene faunas of the Pacific Coast, with descriptions of some new species from the Molopophorus lincolnensis Zone. Proceedings of the California Academy of Sciences 7(6):157-192

Belongs to Acmaea according to R. E. Dickerson 1917

See also Durham 1944

Sister taxa: Acmaea (Acmaea), Acmaea campanaeformis, Acmaea cassis, Acmaea dickersoni, Acmaea funiculata, Acmaea geometrica, Acmaea hannibali, Acmaea lineata, Acmaea martinezensis, Acmaea mitra, Acmaea oakvillensis, Acmaea ocitatia, Acmaea poulseni, Acmaea ruckmani, Acmaea rudis, Acmaea soceni, Acmaea subangulata, Acmaea submesidia, Acmaea victoriana

Type specimen: CAS 438. Its type locality is CAS loc. 181, Cowlitz River, 4mi E. of Vader, which is in an Eocene coastal sandstone/conglomerate in Washington.

Ecology: facultatively mobile epifaunal grazer

Distribution:

• Oligocene of Romania (1 collection)

• Eocene of United States (3: Washington)

• Paleocene of Belgium (1), Poland (3)

Total: 8 collections including 9 occurrences

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