Rugulose Amastra Snail (Amastra rugulosa ssp. rugulosa)
This species was described in 1870.
The Rugulose Amastra Snail was endemic to the Kawaihau and Lihue Districts in eastern Kaua’i, Hawaiian Islands.
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The species may be split into five subspecies, which are or are not valid, these are.:
Amastra rugulosa ssp. annosa Cooke
Amastra rugulosa ssp. fastigata Cooke
Amastra rugulosa ssp. janeae Cooke
Amastra rugulosa ssp. normalis Cooke
Amastra rugulosa ssp. rugulosa Pease
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The species, which was quite abundant in former times, appears to have declined already in pre-European times. [1]
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References:
[1] David A. Burney; Helen F. James; Lida Pigott Burney; Storrs L. Olson; William Kikuchi; Warren L. Wagner; Mara Burney; Deirdre McCloskey; Delores Kikuchi, Frederick V. Grady, Reginald Gage II; Robert Nishek: Fossil evidence for a diverse biota from Kaua’i and its transformation since human arrival. Ecological Monographs 7(14): 615-641. 2001
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edited: 20.04.2019