Sedilia sedilia

Scientific Classification


Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Neogastropoda
Family: Drillidae
Genus: Sedilia
Species: Sedilia sedilia (Dall, 1890)

Information

Waccamaw Formation

Duplin Formation

Tamiami Formation (Pinecrest Beds)

Remarks

Synonymy: Drilllia sedilia Dall, 1890: p. 33, pl. 2, fig. 1.

Type Specimen: USNM 97323 (holotype), “Caloosahatchie River, near Fort Thompson, Florida” (Merrill, 1905, p. 236).

Other Combinations: Drillia sedilia Dall, 1890 Sedilia sedilia (Dall, 1890) (Accepted name)

Original Description: From Dall, 1890 (p. 33):“Caloosahatchie beds, rare. 5 Shell small, stout, strongly sculptured; whorls about six, moderately rounded; suture appressed, inconspicuous; nucleus turbiniform, low, large for the size of the shell, smoothest on top, transversely strongly, uniformly plicate on the sides, with fine, spirally striate interspaces; later whorls with three or four (on the last whorl twelve) strong, even spiral cords with hardly wider interspaces, and five or six more closely crowded on the canal; the fasciole shows faint spiral threading of a finer kind on its surface, which is more distinct on the earlier whorls; transverse sculpture of (on the last whorl about twelve) rounded ribs, which do not quite reach the suture and are obsolete on the canal; the spirals cross these without nodulation; lines of growth faint. terminal varix stout; notch shallow, rounded; aperture rather wide and short, with a moderate callus near the notch and on the pillar and a slightly recurved wide and short canal. Max. lon. of shell 10.0; max. lat. 4.0 mm. The most notable features of this little shell are the uniformity of its sculpture and its short and chunky form.”

Online Resources

WoRMS record 834089

References

Dall, W. D. 1890. Contributions to the Tertiary Fauna of Florida, with especial reference to the Miocene Silex-Beds of Tampa and the Pliocene beds of the Caloosahatchie River. Part I. Pulmonate, opisthobranchiate and orthodont gastropods. Transactions of the Wagner Free Institute of Science of Philadelphia, 3(1): 1-200, pls. 1-12. BHL