| Otukaia | |
|---|---|
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| Apertural view of the shell of Otukaia kiheiziebisu | |
Scientific classification 
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| 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
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| 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]
- ^ Ikebe (1941) Venus 11: 60; Ikebe (1942) Jap. J. geol. geogr. 18(4): 277.
- ^ WoRMS (2010). Otukaia Ikebe, 1942. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=456482 on 2010-04-22
- ^ (in Japanese and English) Otuka Y. (1939). "日本産エビスガヒ屬の一新種 A new Calliostoma from Japan". Venus 9(1): 27–29. CiNii.