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

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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

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

References

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  • 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
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  • Tucker, J.K. (2004). "Catalog of recent and fossil turrids (Mollusca: Gastropoda)" (PDF). Zootaxa. 682: 1–1295. doi:10.11646/zootaxa.682.1.1.
  • Gastropods.com: Ptychobela baynhami