The Concealed Helicostyla Snail was described in 1841.:
“Imperforate, ovate-oblong, solid; yellowish, ornamented with two bands and a basal area of chestnut, veiled with a whitish hydrophanous cuticle. Spire conic, apex obtuse. Whorls 6, scarcely convex, the last about equal to three-sevenths the entire length. Columella nearly straight, slightly dilated, rose-white; aperture oval, milk-white within; peristome somewhat thickened, narrowly reflexed, brown-edged.” [1]
This species is apparently restricted to the Camotes Islands east of Cebu Island, Philippines; it is possibly extinct now.
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References:
[1] George W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second series: Pulmonata. Vol 8: Helicidae – Volume VI. 1892
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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a. o.: Manual of Conchology. Second series: Pulmonata. Vol 8: Helicidae – Volume VI. 1892’
(public domain)
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edited: 23.08.2022