Tag Archives: Eburnella casta Newcomb

Achatinella casta (Newcomb)

Casta Oahu Tree Snail (Achatinella casta)

The Casta Oahu Tree Snail was described in 1853; it was found in the forests along he ridges north of Pearl Harbor on the island of O’ahu, Hawaiian Islands.

The shells reach sizes of about 1,67 cm in height; they have six whorls, which are rounded and margined above; the simple lip is thickened within and the short columella has a strong plaited brownish tooth; they are glossy white or yellowish with extremely variable transverse bands of brown, pink or white, variously arranged. [1]


The species is now considered extinct.



[1] Recovery Plan for the O’ahu Tree Snails of the genus Achatinella. U.S. Department of the Interior Fish and Wildlife Service. Region One, Portland, Oregon. April 1993


Depiction from: ‘W. Tryon; H. A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata, Vol. 22, Achatinellidae 1912-1914′

(public domain)


edited: 09.06.2021