Ogasawarana obtusa

Ogasawarana obtusa
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Neritimorpha
Order:	Cycloneritida
Family:	Helicinidae
Genus:	Ogasawarana; Wagner, 1905
Species:	O. obtusa
Binomial name
	Ogasawarana obtusa; Chiba, Sasaki, Suzuki & Horikoshi, 2008

Ogasawarana obtusa is an extinct species of snail from Chichi-jima, Ogasawara, Japan. The holotype and paratypes are from 720 years BP. The shell is 4.9 to 5.3 millimetres (0.19 to 0.21 in) in diameter and 2.7 to 2.8 millimetres (0.11 to 0.11 in) in height. It has approximately 3.5 whorls. The surface of the shell is smooth, with fine growth lines and no spiral lines.^[1]

References

^ ^a ^b Chiba, Staoshi; Tetsuro Sasaki; Hajime Suzuki; Kazuo Horikoshi (2008). "Subfossil Land Snail Fauna (Mollusca) of Central Chichijima, Ogasawara Islands, with Description of a New Species". Pacific Science. 63: 137–145.
^ Wagner (1905). Denkschr. Akad. Wiss. Wien 77: 395.

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[cssh-1] Chiba, Staoshi; Tetsuro Sasaki; Hajime Suzuki; Kazuo Horikoshi (2008). "Subfossil Land Snail Fauna (Mollusca) of Central Chichijima, Ogasawara Islands, with Description of a New Species". Pacific Science. 63: 137–145.

[2] Wagner (1905). Denkschr. Akad. Wiss. Wien 77: 395.

[2]

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