original descriptionGofas S. (2007). Rissoidae (Mollusca: Gastropoda) from northeast Atlantic seamounts. <i>Journal of Natural History 41(13–16)</i>: 779–885 page(s): 794-796 [details]
From editor or global species database
Biology Type of larval development: direct (non planktotrophic) denoted by paucispiral protoconch. [details] Diagnosis Shell up to 1.6 mm high, with a protoconch of 1.25 whorls and teleoconch of 2.5 to 3.0 whorl; surface of protoconch covered by minute granules arranged in blurry spiral bands, not appreciable under the optical microscope. Teleoconch sculpture with axial ribs (40-47 on the penultimate whorl), minute spiral threads and very faint spiral cords more developed on the abapical area. Outer lip of aperture with a thin edge, thickened externally at a distance of the edge by a broad rim, smooth inside. Shell colour white.
This species from the summit of Seine seamount differs consistently from Alvania microstriata Hoenselaar & Goud, 1998 collected more deeply in 320-455 m, having much finer and more numerous ribs, a more distinct subsutural furrow and an outer lip which is thickened externally at a distance of the edge. [details] Distribution Seine seamount, endemic, common in 165-190 m. [details] Type locality Seine seamount (33º45'N, 14º211W, 165 m). [details]