Scientific Classification
| Kingdom: Animalia |
| Phylum: Mollusca |
| Class: Gastropoda |
| Order: Neogastropoda |
| Family: Mangeliidae |
| Genus: Brachycythara |
| Species: Brachycythara terminula (Dall, 1890) |
Information
Geological Range
Paleogeographic Distribution
Stratigraphic Occurrences
| Bermont Formation |
| Caloosahatchee Formation |
| Tamiami Formation (Pinecrest Beds) |
Remarks
Synonymy: Cythara terminula (Dall, 1890): p. 38, pl. 2, fig. 5.
Type Specimen: USNM 97338 (syntypes), “Pliocene. Caloosahatchie River, near Fort Thompson, Florida” (Merrill, 1905, p. 209).
Original Description: From Dall, 1890 (p. 38): “Caloosahatchie beds, rare. Shell acute at both ends, seven-whorled ; nucleus minute, smooth ; later whorls transversely sculptured with nine narrow, rather sharp uniform ribs extending from suture to canal in a nearly straight line, and but little stronger on the periphery than elsewhere; there are also fine, sharp incremental lines, most marked in the spiral furrows; spiral sculpture of numerous rather uniform flattened bands separated by sharp, much narrower channels, and marked by a central impressed line less deep and wide than the channels, but giving to the bands the look of running in pairs ; suture appressed and inconspicuous ; whorls fuller near the suture in front than at the middle of the whorl, and rather depressed in front of the suture, though not marked bya fasciole there ; last whorl much the largest ; aperture long and narrow ; notch inconspicuous, canal not differentiated ; callus smooth on the pillar and smooth or slightly striated by the sculpture, inside the outer lip; varix stout and wide. Max. lon. of shell 16.0; of last whorl 12.5 ; max. Jat. of shell 6.7 mm.”
Online Resources
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. Reviewed by Jonathan R. Hendricks. First posted March 23, 2026.