Schwartziella peregrina, Gofas, 2007

Gofas, Serge, 2007, Rissoidae (Mollusca: Gastropoda) from northeast Atlantic seamounts, Journal of Natural History 41 (13 - 16), pp. 779-885 : 871-872

Schwartziella peregrina n. sp.

( Figure 59 )

Type material

Holotype MNHN 9727 (sh., 6.28× 2.12 mm) and nine paratypes MNHN 9785 (sh., 5.90×2.10 to 6.60× 2.40 mm) from Seamount 2 sta. DW152, in MNHN.

Type locality Meteor seamount, 30 ° 02.09N, 28 ° 22.19W, 470 m. Material examined Meteor— Seamount 2 sta. DW136, 1 sh. (5.80× 1.84 mm); DW143, 16 sh. (5.15×1.85 to

6.37×2.00 mm); DW152, the type material.

Etymology

From Latin peregrinus, a wanderer or pilgrim, alluding to the remote geographical origin.

Description Shell very slender, solid, up to 6.6× 2.4 mm. Protoconch of 1.5 quite convex whorls,

smooth. Teleoconch with ca 7.5 quite convex whorls; body whorl rounded. Surface with strong, opisthocline, slightly flexuous axial ribs (ca 14 on the penultimate whorl), equivalent in size to the interspaces; and a complex spiral microsculpture of longitudinal slots which are offset along the growth lines. Aperture piriform, channelled at both ends. Outer lip opisthocline, strongly thickened externally, inside smooth, with a sharp edge. Inner lip slightly thickened, appressed.

Remarks

There are many species of Schwartziella in the Cape Verde Islands (see Rolán and Luque 2000) and a few on the mainland of West Africa (see Gofas 1999), but S. peregrina differs in being much more slender than any of them.

Figures

Figure 59. Schwartziella peregrina n. sp. (A) Holotype (sh.) from Meteor seamount, DW152 (470 m), actual size 6.28 mm; (B) protoconch of a paratype, same locality; (C) microsculpture of teleoconch whorl. Scale bars: 100 Mm (B); 50 Mm (C).