Alvania electa ( Monterosato, 1874 )

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 : 17-18

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.7224161

persistent identifier

https://treatment.plazi.org/id/03D37947-487E-FFE1-A0B1-FDC546040356

treatment provided by

Plazi

scientific name

Alvania electa ( Monterosato, 1874 )
status

 

Alvania electa ( Monterosato, 1874) View in CoL

( Fig. 9 View FIGURE 9 )

Material examined. (4 empty shells and 6 with soft parts, in 6 samples): SPAIN • 1 sPc; 43° 48.587′N, 008° 51.402′W to 43° 49.545′N, 008° 51.197′W; 610– 598 m; 10–20 SeP. 2003; DIVA-Artabria I EBS-600 GoogleMaps 2 sPc + 2 sh; 43° 36.544′N, 009° 03.064′W to 43° 36.816′N, 009° 04.339′W; 601–619 m; 17–28 SeP. 2004; VERTIDOS GA-EBS-600 GoogleMaps 1 spc; Polygon delimited by Points 44° 10.000′ N, 009° 00.000′ W /44° 10.000′ N, 008° 35.000′ W/44° 00.000′ N; 009° 00.000′ W/44° 07.000′ N; 008° 35.000′ W; 417–668 m; SARRIDAL (2006–2007) SARRI-4 • 1 sh; 44° 08.516′N, 008° 40.788′W to 44° 09.688′N, 008° 39.721′W; 436– 428 m; 15–24 Jul. 2008; A SELVA EBS-11 GoogleMaps 1 sPc + 1 sh; 44° 08.516′N, 008° 40.788′W to 44° 09.688′N, 008° 39.721′W; 436– 428 m; 15–24 Jul. 2008; A SELVA EBS-11-2 GoogleMaps 1 spc; 43° 48.252′N, 008° 51.427′W to 43° 49.707′N, 008° 51.164′W; 575–584 m; 15–24 Jul. 2008; A SELVA EBS-30-1 GoogleMaps .

Remarks. This species has been recorded from the southern part of the Bay of Biscay to off the Canaries and Mediterranean Sea (where the type locality is located) in a wide depth range, normally in 150–800 m and occasionally deeper down to 2770 m ( Bouchet & Warén 1993). We have found six shells with soft parts and four empty shells in samples collected between 400 and 700 m in muddy sand bottoms.

Alvania electa is a rather variable species, as was pointed out by Bouchet & Warén (1993), and a cryptic species-complex may be involved. Its complex synonymy was unraveled by Oliverio et al. (1992). This species is characterized by its deeply channeled suture, low number of sharp axial ribs, narrow umbilical chink, and large and blunt apex ( Figs. 9a, d–f View FIGURE 9 ). Protoconch sculpture with irregular microgranules separated by about six equidistant fine riblets ( Figs. 9b, c, g–i View FIGURE 9 ).

The specimens here studied match with those figured by Gofas & Warén (1982, figs. 24 and 32 as Alvania deliciosa ( Jeffreys, 1884) , Oliverio et al. (1992, figs. 17–20) and Bouchet & Warén (1993, figs. 1412, 1415 and 1420).

In Figure 10 a–d View FIGURE 10 we show for comparison a shell (as Alvania sp. ) from the Djibouti Bank (Alborán Sea) whose protoconch is like that of A. electa , but because its convex whorls and the higher number of axial ribs it resembles Alvania porcupinae Gofas & Warén, 1882 . On the other hand, the Mediterranean Alvania elegantissima ( Monterosato, 1875) has sometimes been confused with A. electa , but according to Oliverio et al. (1992) its convex whorls and protoconch without sculpture allow differentiate both species. Figure 10e–g View FIGURE 10 shows a shell from off the Italian coast of the Tyrrhenian Sea that may be Alvania elegantissima by having opisthocline axial ribs and a protoconch lacking sculpture.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Littorinimorpha

Family

Rissoidae

Genus

Alvania

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