Irregular Leptachatina Snail (Leptachatina irregularis)  

The Irregular Leptachatina Snail was described in 1855. [or 1856, according to which source]  

This species, if it is accepted as one, is apparently only known from one collection [or even from only one specimen?], that was collected somewhere on the “Sandwich Islands”, the exact origin is not known.  

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The The Irregular Leptachatina Snail, however, has not been accepted by all authors, and if it has been, it was sometimes placed into the genus Amastra, it is now thought to most certainly be identical with Leptachatina fusca Newcomb. [1]  

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References:  

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911  

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edited: 31.03.2018