Kaipaupau Amastra Snail (Amastra textilis ssp. kaipaupauensis)
The Kaipaupau Amastra Snail was described in 1911, as far as I understand, it is known from a single specimen that was collected at a place named Kaipaupau, which may actually be the area around the Kaipapa’u Waterfall near the northeastern coast of O’ahu, Hawaiian Islands.
***
… from the description.:
“The shell is short, subperforate, thin, with straightly conic spire and convex whorls, the last quite rotund; dull purplish-brown, the thin cuticle yellowish on theearly whorls. Embryo finely striate; later whorls with fine, irregular sculpture of growth-wrinkles. Aperture purplish within, the lip very narrowly thickened. Columnellar lamella thin, its lower edge subhorizontal.
….
Near The above, yet with narrower, straightly conic spire and more convex whorls. ….” [1]
The shell has a length of 1,1 cm and reaches 0,7 cm in diameter.
*********************
References:
[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911
*********************
(public domain)
*********************
edited: 26.04.2019