Otukaia
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.
The generic name Otukaia honors Japanese malacologist Yanosuke Otuka, who described the type species Calliostoma kiheiziebisu Otuka, 1939.
Species
The following species are accepted in the genus Otukaia:- Otukaia beringensis Tuskes & R. Clark, 2018
- Otukaia ikukoae Sakurai, 1994
- Otukaia kiheiziebisu
- Otukaia blacki Dell, 1956, accepted as Maurea alertae
- Otukaia chilena, accepted as Maurea chilena
- Otukaia crustulum Vilvens & Sellanes, 2006, accepted as Calliotropis crustulum
- Otukaia delli McLean & Andrade, 1982, accepted as Maurea delli
- Otukaia eltanini Dell, 1990, accepted as Maurea eltanini
- Otukaia rossica, accepted as Margarites rossicus Dall, 1919