Strobiligera undefined-A

Strobiligera sp. A Fig. 10 Material examined GUADELOUPE (Karubenthos 2 expedition) • 1 sh; stn CP4513; MNHN • 1 sh; stn DW4549; MNHN • 1 sh; stn DW4550; MNHN • 1 sh; stn DW4599; MNHN. Description Shell sinistral, conical-fusiform, up to 5.0 mm long, 1.1 mm wide, apical angle of early whorls 14–15°. Protoconch paucispiral, sub-columnar, 3.0–3.25 whorls, 0.59–0.73 mm long, 0.38–0.47 mm wide; small nucleus rises in an adapical direction and further goes abapical in an oblique descent; two main smooth spiral cords, similarly-sized, situated at 37–44% and 71–77% of last whorl height, in addition to a very narrow subsutural cord; gradual transition to teleoconch, from a smooth spiral sculpture to a nodulous one. Teleoconch with up to 11 whorls; three main spiral cords (continuous to those of protoconch), adapical one initially strongly reduced, gradually strengthening and reaching same size as other cords between sixth and eighth whorls; suture shallow, with a very thin sutural cord; 18 orthocline to slightly opisthocline axial ribs on ninth teleoconch whorl; medium-sized, nearly rounded to slightly elliptical nodules; base apparently not fully developed. Shell white. Remarks Strobiligera sp. A is currently known from small and often worn shells, of up to 5.0 mm in length, although it is uncertain whether the largest shell (Fig. 10E) is adult or juvenile. It differs from S. cf. enopla in the earlier full development of the adapical spiral cord of the teleoconch and in the first protoconch whorl (not slightly inflated, as observed in most shells of S. cf. enopla). The shell of Strobiligera sp. A is completely white, contrasting with the brown adapical spiral cord in the teleoconch of S. picta sp. nov. Adult shells are required to confirm this as a new species. Geographic distribution Guadeloupe. Bathymetric distribution 262–644 m (empty shells).