Ogasawarana obtusa

Ogasawarana obtusa
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
(unranked):	clade Neritimorpha; clade Cycloneritimorpha
Superfamily:	Helicinoidea
Family:	Helicinidae
Genus:	Ogasawarana; Wagner, 1905[1]
Species:	O. obtusa
Binomial name
	Ogasawarana obtusa; Chiba, Sasaki, Suzuki & Horikoshi, 2008[2]

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.[2]

References

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

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

[cssh-2] 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.