Alvania cancapae Bouchet & Warén, 1993

Oliver, Joan Daniel, Gofas, Serge, Urgorri, Victoriano, Díaz-Agras, Guillermo & Templado, José, 2022, Rissoidae gastropods of the outer continental shelf and slope off Galicia (NW Spain), Zootaxa 5196 (1), pp. 1-45 : 20-21

publication ID

https://doi.org/ 10.11646/zootaxa.5196.1.1

publication LSID

lsid:zoobank.org:pub:1B12892E-D68F-4BFE-8E9A-7F19E220E73D

DOI

https://doi.org/10.5281/zenodo.7224173

persistent identifier

https://treatment.plazi.org/id/03D37947-487D-FFE4-A0B1-FCC0438F01B6

treatment provided by

Plazi

scientific name

Alvania cancapae Bouchet & Warén, 1993
status

 

Alvania cancapae Bouchet & Warén, 1993 View in CoL

( Fig. 12 View FIGURE 12 )

Material examined. (2 empty shells in the same sample): SPAIN • 2 sh; 44° 14.929′N, 008° 30.255′W GoogleMaps to 44° 15.367′N, 008° 30.438′W; 2121–2516 m; 15–24 Jul. 2008; A SELVA AT-12 .

Remarks. Alvania cancapae is a variable species known from off southern Morocco and off Madeira and Canary islands in the depth range 270–2000 m ( Bouchet & Warén, 1993; Hoenselaar & Goud, 1998) with stronger sculpture in shallower specimens. The two shells (of about 2.0 x 1.3 mm) found in one of the samples (collected deeper than 2000 m) have a weak axial sculpture ( Fig. 12a View FIGURE 12 ), with very thin spiral threads narrower than interspaces overrunning the axial ribs ( Figs. 12e, f View FIGURE 12 ), and faint spiral cords on the periumbilical area of the body whorl, but hardly visible on the spire. Protoconch of the shells studied of 1.25 convex whorls ( Figs. 12b, c View FIGURE 12 ) whose surface is covered by minute granules ( Fig. 12d View FIGURE 12 ).

This species resembles to Alvania adinogramma Bouchet & Warén, 1993 , Alvania microstriata Hoenselaar & Goud, 1998 and Alavania seinensis Gofas, 2007 , a group which seems restricted to the Lusitanian seamounts and Madeira ( Gofas 2007). The present records represent a northward range extension of the species.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Littorinimorpha

Family

Rissoidae

Genus

Alvania

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