Otukaia
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| Otukaia | |
|---|---|
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| Apertural view of the shell of Otukaia kiheiziebisu | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Trochida |
| Superfamily: | Trochoidea |
| Family: | Calliostomatidae |
| Genus: | Otukaia Ikebe, 1942[1] |
| Type species | |
| Calliostoma kiheiziebisu Otuka, 1939 | |
| Species | |
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See text | |
Otukaia is a genus of medium-sized sea snails, which are marine gastropod molluscs in the family Calliostomatidae, the top shells. Otukaia has long been considered a subgenus of Calliostoma and is still treated as such by many taxonomists.
Snails in this genus are characterized by their relatively large, silky-white, thin shell, lacking an umbilicus. Their spiral whorls are flat to slightly convex, with the first three whorls sometimes displaying sculpture that may persist on later whorls. They possess a rachidian radula. These snails can be found worldwide in deep water.
Some authors consider Otukaia Ikebe, 1942, a subgenus of Calliostoma Swainson, 1840.[2]
The (sub)generic name Otukaia honors Japanese malacologist Yanosuke Otuka (1903–1950), who described the type species Calliostoma kiheiziebisu Otuka, 1939.[3]