Raphitoma columnae explained

Raphitoma columnae is an extinct species of sea snail, a marine gastropod mollusk in the family Raphitomidae.

Description

The length of the shell reaches 23 mm, its diameter 7 mm.

Compared with Raphitoma harpula, the shell is longer, the whorls are less convex, the suture is less impressed. The body whorl is shorter and less depressed on top. The axial ribs are hardly oblique. The transverse striae are uniform and don't form nodules when crossing the ribs. The siphonal canal is straight, shorter and hardly noticed.^[1]

Distribution

Fossils of this marine species were found in Miocene strata of Italy.

References

• Scacchi A. 1835. Notizie intorno alle conchiglie ed a' zoofiti fossili che si trovano nelle vicinanze di Gravina in Puglia. Annali Civili del Regno delle Due Sicilie 6: 75-84; 7: 5-18, 2 pl.

External links

• Tucker . J.K.. 2004 . Catalog of recent and fossil turrids (Mollusca: Gastropoda). PDF. Zootaxa. 682. 1–1295.

Notes and References

1. https://www.biodiversitylibrary.org/item/45375 Bellardi, L. (1877). I molluschi dei terreni terziarii del Piemonte e della Liguria. Parte II (Pleurotomidae). Stamperia Reale, Torino, 364 pp., 9 pl.