Kongsrudia gruveli ( Dautzenberg, 1910 ) Dautzenberg, 1910

Lygre, Frøydis & Schander, Christoffer, 2010, Six new species of pyramidellids (Mollusca, Gastropoda, Pyramidelloidea) from West Africa, introducing the new genus Kongsrudia, Zootaxa 2657, pp. 1-17 : 4

Kongsrudia gruveli ( Dautzenberg, 1910) comb. nov.

(Fig. 2 A–F)

Actaeopyramis gruveli Dautzenberg, 1910 . Act. S. Linn. Bordeaux 64: 93-94. Pl. 3. Figs 6–7 . Pyrgulina bavayi Dautzenberg, 1913 . Ann. Inst. Oceanogr. 5: 69–70, pl. 3, figs 23–24 Chrysallida gruveli Auct.

Type locality: Pointe Cansado, Mauritania, Mission Gruvel.

Material examined: Station N15, 7 shells; G2, 1 shell; G 16, 1 shell, CR 1, 1 shell

Description: Shell tall, solid, slender, conical, white with pointed apex. Protoconch of type B, tending to C. Whorls almost straight, turreted. Suture distinct but not deep, noticeably oblique. Axial ribs thin, very elevated, shouldered, straight and orthocline in initial whorls, slightly prosocline later. Interspaces much broader than ribs. Ribs continue to base. Spiral ridges distinct and numerous, covering axial ribs giving a gridlike appearance. Interspaces equally broad or broader than ridges. Space between apical ridge and suture broader than interspaces. Ridges continue to base. Aperture oval, almost kidney-shaped because of prominent tooth. Inner side of outer lip with 7-9 riblets. Distinct columellar tooth. Umbilicus deep and narrow.

Distribution: From Mauritania to Angola. Infralitoral and circalitoral ( Peñas & Rolan 2002)

Remarks: Kongsrudia approximans ( Dautzenberg 1913a) show a sculpture similar to K. gruveli , but whorls are more convex and not turreted. The axial ribs and spiral ridges have narrower interspaces and the ridges are broader and continue all the way to the upper suture. The riblets seen on the inner side of the outer lip are not as prominent in K. approximans . Kongsrudia rolani n. sp. is similar to K. gruveli , for comparison, see this species.

Figures

FIGURE 6 A – D. Turbonilla iseborae n. sp. A: Holotype, teleoconch, station G 2, Gabon, 00 º 19 ’ N 09 º 15 ’ E; B: Paratype, station G 2, Gabon, 00 º 19 ’ N 09 º 15 ’ E; C: Holotype, protoconch; D: Paratype, details of the base.

FIGURE 7 A – E. Turbonilla korantengi n. sp. A: Holotype teleoconch, station CR 2, Republic of Congo, 04 º 29 ’ S 10 º 56 ’ E; B-C: Holotype protoconch; D: Holotype details of the sculpture and base; E: Holotype details of the sculpture.