Alvania punctura (Montagu, 1803)

Gofas, Serge, 2007, Rissoidae (Mollusca: Gastropoda) from northeast Atlantic seamounts, Journal of Natural History 41 (13 - 16), pp. 779-885 : 791

Alvania punctura (Montagu, 1803)

( Figure 5F )

Material examined Gorringe— Seamount 1 sta. DW16, 1 sh. (1.96× 1.26 mm); CP20, 1 sh. (1.60×1.00 mm).

Ampère— Seamount 1 sta. DE98, 2 sh. (1.96×1.22 to 2.22× 1.42 mm).

Remarks

This is also a species with a planktotrophic development, here coming close to the southernmost part of its range.

Figures

Figure 5. Alvania species from Lusitanian seamounts, shared with the mainland shelf. (A) A. cancellata (da Costa, 1778), shell from Gorringe seamount, DW33 (55–70 m), actual size 4.90 mm; (B) A. cancellata, protoconch of a shell from Ampère seamount, DE98 (300–325 m); (C) A. zylensis Gofas and Warén, 1982 from Gorringe seamount, CP20 (305–320 m), actual size 2.25 mm; (D) protoconch of the same specimen; (E) A. zylensis from Ampère seamount, DW92 (117–129 m), actual size 2.00 mm; (F) A. punctura (Montagu, 1803), protoconch of a shell from Gorringe seamount, CP 20; (G) Alvania vermaasi van Aartsen, 1975, protoconch of a shell from Gorringe seamount, DW08 (470–485 m). Scale bars: 100 Mm.