| 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, 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]
Species
[edit]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
[edit]- ^ 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.
- ^ a b "Otukaia". WoRMS. World Register of Marine Species. Retrieved 2019-01-09.
- ^ "Gastropods by Eddie Hardy | Conchology". www.gastropods.com. Retrieved 16 June 2010.
- ^ Vilvens & Sellanes (2006). The Nautilus 120(1): 15-20.
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction