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WoRMS taxon details
original description
Hoenselaar H.J. & Goud J. (1998). The Rissoidae of the CANCAP expeditions, I: the genus <i>Alvania</i> Risso, 1826 (Gastropoda, Prosobranchia). <em>Basteria.</em> 62(1-2): 69-115., available online at http://natuurtijdschriften.nl/download?type=document&docid=597129
page(s): 91-92 [details] Available for editors  [request]
basis of record
Gofas, S.; Le Renard, J.; Bouchet, P. (2001). Mollusca. in: Costello, M.J. et al. (eds), European Register of Marine Species: a check-list of the marine species in Europe and a bibliography of guides to their identification. <em>Patrimoines Naturels.</em> 50: 180-213., available online at http://www.vliz.be/imisdocs/publications/ocrd/254404.pdf [details]
additional source
Gofas S. (2007). Rissoidae (Mollusca: Gastropoda) from northeast Atlantic seamounts. <i>Journal of Natural History 41(13–16)</i>: 779–885 [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 (20-25 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 not thickened externally even on large, apparently full-grown specimens, smooth inside. Shell colour white.
This species differs from A. adinogramma Bouchet & Warén, 1993 in having the ribs bulging adapically along the suture, with a distinct subsutural furrow instead of an inconspicuous subsutural depression; from A. seinensis Gofas, 2007 in having fewer ribs and a higher spire, and from both species in consistently lacking the thickening on the external part of the outer lip even in adults. [details]
Distribution Madeira, rare at 360 m; Seine seamount, moderately common in 320-455 m. [details]
Type locality Madeira, bathyal [details]
From editor or global species database
Unreviewed
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Present 
