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 | |
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, 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]
The following species are accepted in the genus Otukaia: [4]
Calliostoma is a genus of small to medium-sized sea snails with gills and an operculum, marine gastropod molluscs within the family Calliostomatidae, the Calliostoma top snails. Previously this genus was placed within the family Trochidae. Calliostoma is the type genus of the family Calliostomatidae.
Calliostomatidae is a family of sea snails within the superfamily Trochoidea and the clade Vetigastropoda.
Herpetopoma is a genus of sea snails, marine gastropod molluscs of the family Chilodontaidae.
Turritriton is a genus of medium-sized sea snails, marine gastropod molluscs in the family Cymatiidae. This is often still regarded merely as a subgenus of the genus Cymatium.
Solariellidae is a family of small sea snails, marine gastropod mollusks in the superfamily Trochoidea.
Calliotropis is a genus of sea snails, marine gastropod mollusks in the family Eucyclidae.
Perrinia is a genus of sea snails, marine gastropod mollusks in the family Chilodontaidae.
Margarites huloti is a species of sea snail, a marine gastropod mollusk in the family Margaritidae.
Calliostoma granulatum, common name the European granular top shell, is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Otukaia kiheiziebisu is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Calliostoma otukai is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae.
Calliotropis crustulum is a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae. This species occurs off Chile.
Calliostomatinae is a subfamily of gastropods, belonging to the family Calliostomatidae.
Antalis is a genus of tusk shells, marine scaphopod mollusks.
Dymares is a genus of sea snails, marine gastropod mollusks in the family Calliostomatidae within the superfamily Trochoidea, the top snails, turban snails and their allies.
Sinutor is a genus of sea snails, marine gastropod mollusks in the family Calliostomatidae within the superfamily Trochoidea, the top snails, turban snails and their allies.
Venustas is a genus of sea snails, marine gastropod mollusks in the family Calliostomatidae within the superfamily Trochoidea, the top snails, turban snails and their allies.
Dallspira is a genus of sea snails, marine gastropod mollusks in the family Pseudomelatomidae.
Maurea is a genus of sea snails, marine gastropod mollusks, in the family Calliostomatidae within the superfamily Trochoidea, the top snails, turban snails and their allies.