Armsia petasus (Ancey)
|syn. Pterodiscus petasus (Ancey)|
Hawai'i Islands: O'ahu
|local name: -|
|size: ca. 3,5 cm (?)
extinction date: last seen 1958
|The Petasus Snail, so named
after the identically named headdress from the ancient Greece, was
scientifically described in the year 1899.
The species, the sole in its genus, occurred at several places within the Wai'anae region in the west of the island of O'ahu, where the last living individuals were seen in the year 1958.
Petasus Snail (Armsia petasus)
Depiction from: 'Alpheus Hyatt; Henry Augustus Pilsbry (Leptachatina by C. Montague Cooke): Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911'