Alvania punctura ( Montagu, 1803 )

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 : 11

Alvania punctura ( Montagu, 1803)

( Figs. 5 a–d )

Material examined. (16 empty shells and 3 with soft parts): SPAIN • 1 sh; 43° 52.823′N, 008° 56.151′W to 43° 52.837′N, 008° 55.597′W; 988– 920 m; 08–15 SeP. 2002; DIVA-Artabria I DRN-1000 • 1 sh; 43° 57.030′N, 008° 54.795′W to 43° 57.248′N, 008° 54.133′W; 1191– 1132 m; 08–15 SeP. 2002; DIVA-Artabria I AT-1000 • 1 sh: 43° 35.451′N, 008° 34.432′W to 43° 34.810′N, 008° 35.407′W; 153– 151 m; 08–15 SeP. 2002; DIVA-Artabria I EBS-150 • 2 sh; 43° 26.703′N, 008° 30.669′W to 43° 27.452′N, 008° 29.612′W; 103– 102 m; 10–20 SeP. 2003; DIVAArtabria I EBS-100 • 6 sh (juv); 43° 29.412′N, 008° 28.362′W to 43° 29.779′N, 008° 28.240′W; 110–111 m; 17-28 Sep. 2004; VERTIDOS GA-AT-110 • 3 sPc + 8 sh; 42° 30.391′N, 009° 19.517′W to 42° 29.428′N, 009° 17.924′W; 147–148 m; 17–28 Sep. 2004; VERTIDOS AG-EBS-150 .

Remarks. This is a characteristic species of northeastern Atlantic continental shelf from the White Sea ( Nekhaev 2013) to the Strait of Gibraltar (absent from Baltic and eastern basin of English Channel), south to the Alborán Sea, rare and rather local in the remainder of the Mediterranean ( Gofas & Warén 1982). In the northern part of its range, it may be found intertidally, whereas it is usually found in circalittoral bottoms in the Mediterranean. Few shells were recorded on Gorringe and Ampère seamounts ( Gofas 2007). Two of the shells studied, adult and juvenile, are shown in Figure 5 a–b , and a detail of the microsculpture can be seen in Figure 5d . The protoconch in the studied shells was eroded ( Fig. 5c ).

Shells with soft parts were only found in one of the studied sampled collected at 150 m in muddy sand bottom.

Figures

FIGURE 5. a–d Alvania punctura (Montagu, 1803). a Shell (1.8 mm) (DA-I(02): DRN-1000); b Young shell (1.2 mm) (VE: AG-EBS-150); c Lateral view of the protoconch; d Details of the microsculpture of the teleoconch. e–g Alvania testae (Aradas & Maggiore, 1844) (VE: AG-EBS-150). e Shell (2.2 mm); f Lateral view of the protoconch; g Detail of the microsculpture.