Haplocochlias
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| Haplocochlias | |
|---|---|
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| Shell of Haplocochlias arawakorum (specimen at MNHN, Paris) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Family: | Skeneidae |
| Genus: | Haplocochlias Carpenter, 1864 |
| Type species | |
| Haplocochlias cyclophoreus Carpenter, 1864 | |
Haplocochlias is a genus of sea snails, marine gastropod mollusks in the family Skeneidae.[1]
The solid, subperforate shell has a turbinate shape. The aperture is rounded. The thick peristome is continuous and exteriorly varicose. The columella is not callous.[2]
The shell is small to minute (1–6 mm in height), turbiniform, with a closed to narrowly open umbilicus lined internally with spiral cordlets. The protoconch comprises about three-quarters of a whorl and is either smooth or bears fine spiral cordlets. The teleoconch has a rounded to slightly angular periphery, ornamented with numerous spiral cords and fine axial striae, with minute tubercles present in the interspaces. The aperture is prosocline, with a continuous peristome. The columella is sometimes reflected toward the umbilicus, broadening at its base, and in some species displaying a depressed area where it meets the umbilical cord. The outer lip may be either broad or delicate, and is crenulated or anteriorly expanded.[3]
