Amastra irwiniana Cooke

Irwin’s Amastra Snail (Amastra irwiniana)

Irwin’s Amastra Snail was described in 1908, it was restricted to the summit of Pu’u Lanihuli in the Ko’olau Range of O’ahu, Hawaiian Islands

The shells reach sizes of about 1,12 cm in length and 0,59 cm in diameter, the upper whorls and the base of the last whorl were light brown with a slightly yellowish tinge, the upper portion of the last whorl was dark chestnut. [1]



[1] C. Montague Cooke Jr.: Three new species of Amastra from Oahu. Bishop Museum Occasional Papers 3(2): 213-216. 1908


Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’

(public domain)


edited: 07.10.2020