Ptychobela baynhami

Ptychobela baynhami is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.[1]

Ptychobela baynhami
Shell of Ptychobela baynhami (specimen at MNHN, Paris)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Pseudomelatomidae
Genus: Ptychobela
Species:
P. baynhami
Binomial name
Ptychobela baynhami
(Smith E. A., 1891)
Synonyms[1]
  • Drillia baynhami Melvill & Standen, 1901
  • Pleurotoma baynhami Smith E. A., 1891

Description

The length of the shell attains 29 mm, its diameter 9 mm.

Like Ptychobela suturalis (Gray, 1838), this fusiform, turreted species has a raised fillet at the suture. But it may be distinguished by its shorter body whorl, its more pronounced ribs, and the difference of colour. The shell contains 12 whorls; the first two are smooth and globose. The subsequent whorls are concave above the middle and convex below. The ribs (in the penultimate whorl 9–10) become obsolete a little above the middle of the whorls where the concavity commences, and, being traversed by a distinct tenuous white spiral thread, have a somewhat angulated appearance. The aperture measures 2/5th of the total length. The inner part of the aperture is livid. The columella is slightly arcuate and has a minute callus.[2]

Distribution

This marine species occurs in the Indian Ocean off Aden and Somalia

References
  1. Ptychobela baynhami (Smith E. A., 1891). Retrieved through: World Register of Marine Species on 4 April 2010.
  2. Smith E.A. (1891). On a collection of marine shells from Aden, with some remarks upon the relationship of the molluscan fauna of the Red Sea and the Mediterranean. Proceedings of the Zoological Society of London. (1891): 390–436, pl. 33
  • Abrard (R.), 1941 Mollusques pleistocènes de la Côte française des Somalis, recueillis par E. Aubert de la Rüe. Archives du Muséum National d'Histoire Naturelle, sér. 6, t. 18, pp. 5–105
  • Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295.
  • Gastropods.com: Ptychobela baynhami
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