Scientific Classification
| Kingdom: Animalia |
| Phylum: Mollusca |
| Class: Gastropoda |
| Order: Neogastropoda |
| Family: Columbellidae |
| Genus: Costoanachis |
| Species: Costoanachis camax (Dall, 1890) |
Information
Geological Range
Paleogeographic Distribution
Stratigraphic Occurrences
| Satilla Formation |
| Bermont Formation |
| Caloosahatchee Formation |
| Nashua Formation |
| Waccamaw Formation |
| Jackson Bluff Formation |
| Duplin Formation |
| Tamiami Formation (Pinecrest Beds) |
Remarks
Synonymy: Anachis camax (Dall, 1890): p. 136, pl. 12, fig. 3.
Type Specimen: USNM 112146 (holotype), “Caloosahatchie River, near Fort Thompson, Florida” (Merrill, 1905, p. 42).
Original Description: From Dall, 1890 (p. 136): “Shell slender, elevated, with two small, smooth (usually caducous) nuclear whorls and eightsubsequent reticulated whorls ; spire acute, with flattish sides ; transverse sculpture of (on the last whorl 15) narrow, rounded ribs extending from suture to suture and (on the last whorl) over the periphery, becoming obsolete on the base, and, especially on the later whorls, with much wider interspaces; spiral sculpture of (between the sutures about 5) strong, flattish threads, most marked on the base and interspaces, feeble on the ribs and with subequal interspaces, except the first one in front of the suture, which is wider ; whorls flattish, suture distinct ; aperture rather narrow and long; canal short, pillar twisted; inner lip with a thin callus; outer lip not much thickened and with a few feeble lirze; lines of growth distinct. Max. lon. of shell 14.5; of aperture 5.0; max. diam. of shell 4.5 mm.
Pliocene marls of the Caloosahatchie and Shell Creek.
This form is longer and more slender and more regularly reticulated than any of the recent forms I am acquainted with. It is, perhaps, most like the strong-sculptured variety of A. iontha Ravenel, but much larger.”
Online Resources
WoRMS record 1673346, as Anachis camax.
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
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Page History
Page edited by Kelsey K. Engelke. Page reviewed by Jonathan R. Hendricks and first posted March 30, 2026.