Ptychobela baynhami
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| Ptychobela baynhami | |
|---|---|
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| Shell of Ptychobela baynhami (specimen at MNHN, Paris) | |
Scientific 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] | |
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Ptychobela baynhami is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids and allies.[1]
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]
