Pleurotomella vercoi explained

Pleurotomella vercoi is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.^[1]

Description

The length of the shell attains 20 mm, its diameter 8 mm.

(Original description) A thin, delicately sculptured, acuminate-ovate shell with an acute spire. It contains 8½ whorls, including 2 smooth whorls in the protoconch. The other whorls are convex and obtusely angulate. The ribs are of an undecided character, entirely disappearing on the body whorl. The many spiral lirae are narrow and close, and crossed by extremely delicate and profuse oblique laminae. The type specimen, besides the irregular light-brown markings, has two narrow zones below the periphery. While others are pale straw-colour, without markings. All the specimens are similar in detail of sculpture, but sometimes the longitudinal ribs are only to be seen on the upper whorls. And in one shell the body whorl is distinctly ribbed. The aperture is wide. The columella is straight. The outer lip is thin, simple and moderately produced forward in the middle.^[2]

Distribution

This marine species is endemic to Australia and occurs off South Australia.

References

• Hedley, C. 1922. A revision of the Australian Turridae. Records of the Australian Museum 13(6): 213–359, pls 42–56
• Powell, A.W.B. 1966. The molluscan families Speightiidae and Turridae, an evaluation of the valid taxa, both Recent and fossil, with list of characteristic species. Bulletin of the Auckland Institute and Museum. Auckland, New Zealand 5: 1–184, pls 1–23
• Beu, A.G. 2011 Marine Molluscs of oxygen isotope stages of the last 2 million years in New Zealand. Part 4. Gastropoda (Ptenoglossa, Neogastropoda, Heterobranchia). Journal of the Royal Society of New Zealand 41, 1–153

External links

• Tucker . J.K. . 2004 . Catalog of recent and fossil turrids (Mollusca: Gastropoda) . Zootaxa . 682 . 1–1295 . 10.11646/zootaxa.682.1.1 .

Notes and References

1. MolluscaBase (2019). Pleurotomella vercoi (G.B. Sowerby III, 1896). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=868158 on 2019-02-03
2. http://www.biodiversitylibrary.org/item/52043#page/48/mode/1up Sowerby III, G. B. (1896). List of the Pleurotomidae of South Australia, with descriptions of some new species. Proceedings of the Malacological Society of London. 2(1): 24-32, pl. 3