Otukaia

Otukaia
	Apertural view of the shell of Otukaia kiheiziebisu
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Vetigastropoda
Superfamily:	Trochoidea
Family:	Calliostomatidae
Genus:	Otukaia; Ikebe, 1942[1]
Type species
	Calliostoma kiheiziebisu; Otuka, 1939
Species
	See text

Otukaia is a genus of medium-sized sea snails, 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 authorities.

Snails in this genus are characterized by their relatively large, silky-white, thin shell. They lack an umbilicus. Their spiral whorls are flat to slightly convex. The first three spiral cords can show some sculpture that may persist on later whorls. They have a rachidian radula. They can be found worldwide in deep water.

Some authors use Otukaia Ikebe, 1942 as a subgenus in Calliostoma Swainson, 1840.[2]

The (sub)generic name Otukaia is in honor of the Japanese malacologist Yanosuke Otuka (1903–1950), who described the type species Calliostoma kiheiziebisu Otuka, 1939.[3]

Species

The following species are accepted in the genus Otukaia:[4]

Otukaia beringensis Tuskes & R. Clark, 2018
Otukaia ikukoae Sakurai, 1994
Otukaia kiheiziebisu (Otuka, 1939)[5]

Species brought into synonymy

Otukaia blacki Dell, 1956, accepted as Maurea alertae (B. A. Marshall, 1995)[4]
Otukaia chilena (Rehder, 1971), accepted as Maurea chilena (Rehder, 1971)
Otukaia crustulum Vilvens & Sellanes, 2006,[6] accepted as Calliotropis crustulum (Vilvens & Sellanes, 2006)
Otukaia delli McLean & Andrade, 1982, accepted as Maurea delli (McLean & Andrade, 1982)
Otukaia eltanini Dell, 1990, accepted as Maurea eltanini (Dell, 1990)
Otukaia rossica (Dall, 1919), accepted as Margarites rossicus Dall, 1919

References

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.
"Otukaia". WoRMS. World Register of Marine Species. Retrieved 2019-01-09.
http://www.gastropods.com/Taxon_pages/Family_CALLIOSTOMATIDAE_CALLIOSTOMATINAE.shtml accessed 16 June 2010
Vilvens & Sellanes (2006). The Nautilus 120(1): 15-20.

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[1] Ikebe (1941) Venus 11: 60; Ikebe (1942) Jap. J. geol. geogr. 18(4): 277.

[2] 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

[Otuka_1939-3] (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.

[WoRMS-4] "Otukaia". WoRMS. World Register of Marine Species. Retrieved 2019-01-09.

[5] ttp://www.gastropods.com/Taxon_pages/Family_CALLIOSTOMATIDAE_CALLIOSTOMATINAE.shtml accessed 16 June 2010

[6] Vilvens & Sellanes (2006). The Nautilus 120(1): 15-20.