Planamastra spaldingi ssp. spaldingi Cooke

Spalding’s Planamastra Snail (Planamastra spaldingi ssp. spaldingi

This species was described in 1933, it is restricted to Pukaloa in the Wai’anae Mountains of O’ahu, Hawaiian Islands.

Planamastra spaldingi should be considered a very rare species. In the Museum collection are eight lots; five are from the small valley of Pukaloa. In only one of the lots are there more than two specimens, and not more than 25 to 30 shells have come to my notice.


This species should not be mistaken for Spalding’s Amastra Snail (Amastra spaldingi Cooke).



[1] C. Montague Cooke: New species of Amastridae. Bishop Museum Occasional Papers 10(6): 1-29. 1933


edited: 27.09.2020