Serpulorbis granifera

Phylum: Mollusca
Class: Gastropoda
Order: Littorinimorpha
Family: Vermetidae
Genus: Serpulorbis
Species: Serpulorbis granifera (Say, 1824)

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Geological Range

Early Miocene to Early Pleistocene; Extinct.

Paleogeographic Distribution

Southern Florida to Virginia.

Remarks

Original Description (from Say, 1824, p. 154):

"Covered with longitudinal, contiguous, slightly elevated, granulated striae.

Description. Shell subcylindric, contorted, inferior side flat; the whole surface is composed of very numerous, small, contiguous striae, each consisting of a single row of granules; these series are alternately smaller.

Diameter of the larger end three-tenths, of the largest specimen two-fifths of an inch.

The continuity of the tube within, is interrupted by oblique diaphragms. It sometimes approaches the spiral form, and one specimen has three complete volutions of much regularity."

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Stratigraphic Occurrences

Early Pleistocene: Caloosahatchee Formation (S. FL); Nashua Formation (N. FL); Waccamaw Formation (SC, NC)
Late Pliocene: Duplin Formation (NC); Jackson Bluff Formation (N. FL); Raysor Formation (SC, NC); Tamiami Formation (Pinecrest Beds) (S. FL); Yorktown Formation (VA); Yorktown Formation (Moore House Member) (VA); Yorktown Formation (Upper) (NC)
Early Miocene: Calvert Formation (Plum Point Member) (MD); Chipola Formation (N. FL)