Amphirissoa cyclostomoides Dautzenberg and Fischer, 1897

Gofas, Serge, 2007, Rissoidae (Mollusca: Gastropoda) from northeast Atlantic seamounts, Journal of Natural History 41 (13 - 16), pp. 779-885 : 867

Amphirissoa cyclostomoides Dautzenberg and Fischer, 1897

Amphirissoa cyclostomoides Dautzenberg and Fischer 1897, p 161 , Plate 3 Figures 6–8 .

Type material

Lectotype ( Ponder 1985, p 72) in MOM, reported as destroyed by acidic glass tube ( Bouchet and Warén 1993, p 696). Paralectotypes in MNHN (coll. H. Fischer), IRSN (coll. Dautzenberg) and BMNH.

Type locality

Figures

Figure 6. Alvania adinogramma Bouchet and Warén, 1993. (A, B) Specimen from Josephine seamount, DW45 (315–335 m), actual size 1.56 mm; (C) protoconch; (D) microsculpture, same specimen. Scale bars: 100 Mm (C); 50 Mm (D).

Figure 7. (A–D) Alvania microstriata Hoenselaar and Goud, 1998. (A, B) Shells from Seine seamount, DE84 (450–455 m), actual size 1.57 and 1.54 mm; (C) protoconch, same shell as B; (D) microsculpture, same shell as A. (E–H) Alvania seinensis n. sp. (E, F) Holotype (sh.) from Seine seamount, DE72 (165 m), actual size 1.40 mm; (G) protoconch of the holotype; (H) microsculpture. Scale bars: 100 Mm (C, G); 50 Mm (D, H).

Figure 8. Alvania micropilosa n. sp. (A) Holotype (sh.) from Meteor seamount, DW152 (470 m), actual size 2.58 mm; (B, C) paratypes (sh.), same locality, actual sizes 2.74 and 2.56 mm; (D) protoconch of holotype; (E) detail of holotype, showing the minute periostracal hairs; (F, G) shells from Hyères seamount, DW182 (480 m), actual sizes 2.64 and 2.00 mm; (H) protoconch, same shell as (G). Scale bars: 100 Mm.