Amerianna obiana

Amerianna obiana
	Preserved specimen from 1905
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Superorder:	Hygrophila
Family:	Planorbidae
Genus:	Amerianna
Species:	A. obiana
Binomial name
	Amerianna obiana; (Rolle, 1903)
Synonyms
	Ameria obiana Rolle, 1903; original combination;

Amerianna obiana is a species of freshwater snail in the family Planorbidae. It is found on the island of Obi in Indonesia.

Taxonomy

Amerianna obiana was first described by Hermann Rolle in 1903 as Ameria obiana.^[2]^[1]

Two syntypes are known, with one being located at the Museum für Naturkunde in Berlin, and the other at the Zoological Museum in Amsterdam.^[3]

Description

Amerianna obiana has an oval-shaped shell that measures 18.8 mm (0.74 in) in height by 11.5 mm (0.45 in) in diameter. The shell is left-curling (sinistral). There are 4.5 convex whorls, or shell revolutions, which form a structure called a spire that sticks up slightly. The aperture (shell opening) is oblong, and measures 13.5 by 6.5 mm (0.53 by 0.26 in).^[1]

Distribution

Amerianna obiana is known to inhabit the island of Obi in Indonesia.^[4]

References

1 2 3 Rolle, H. (1903). "Einige neue Binnenmollusken von den Molukken". Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft (in Latin). 35: 23–24. ISSN 0723-4244. LCCN 26022475. OCLC 9674056.
1 2 Vinarski, Maxim (2018). Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O (eds.). "Amerianna obiana". MolluscaBase. World Register of Marine Species. Retrieved 12 July 2026.
↑ "Amerianna obiana (Rolle, 1903)". Global Biodiversity Information Facility. Retrieved 12 July 2026.
↑ Butot, L. J. M. (1954). "Planorbis exustus Desh. and Amerianna carinata (Adams) in Java" (PDF). Basteria. 18 (4): 66. Archived from the original (PDF) on 15 April 2024.

[og-desc-1] 1 2 3 Rolle, H. (1903). "Einige neue Binnenmollusken von den Molukken". Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft (in Latin). 35: 23–24. ISSN 0723-4244. LCCN 26022475. OCLC 9674056.

[worms-2] 1 2 Vinarski, Maxim (2018). Bieler R, Bouchet P, Gofas S, Marshall B, Rosenberg G, La Perna R, Neubauer TA, Sartori AF, Schneider S, Vos C, ter Poorten JJ, Taylor J, Dijkstra H, Finn J, Bank R, Neubert E, Moretzsohn F, Faber M, Houart R, Picton B, Garcia-Alvarez O (eds.). "Amerianna obiana". MolluscaBase. World Register of Marine Species. Retrieved 12 July 2026.

[gbif-3] "Amerianna obiana (Rolle, 1903)". Global Biodiversity Information Facility. Retrieved 12 July 2026.

[Butot-4] Butot, L. J. M. (1954). "Planorbis exustus Desh. and Amerianna carinata (Adams) in Java" (PDF). Basteria. 18 (4): 66. Archived from the original (PDF) on 15 April 2024.

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