Jujubinus vexationis Curini-Galletti, 1990

SSH IV – Fig. 6M–O

Jujubinus vexationis Curini-Galletti, 1990: 43, pl. 2 figs 5–8.

Diagnosis

Shell of medium size for the genus, not very solid, 5–6 spaced spiral cords, elevated, broad interspaces with prosocline lamellae and fine growth lines, peripheral cord evident, high height/width ratio.

Type material

Holotype MADEIRA • dd; Porto Moniz; 33° N, 17° W; DSAT (Pisa, Italy).

Paratypes MADEIRA • 3 dd; same data as for holotype; DSAT (Pisa, Italy) (paratypes B–D) • 2 dd; same data as for holotype; labelled “ C. striatum L. Madeira”; MCZR-M-TYPE-00018 /P (paratypes A, E).

Other material examined

MADEIRA • 34 lv; unprecised locality; MCZR-M-11715 • 1 dd; Porto Moniz; 1912; Tomlin leg.; MCZR-M-11684 • 14 dd; Madeira; MCG collection • 1 dd; unprecised locality; 1912; Tomlin leg.; MCZR-M-11684.

Description (in parentheses data of the holotype)

SHELL. Shell of medium size for the genus, height 6.5–8.0 (6.9) mm, width 5.0–6.0 (6.0) mm, height/ width ratio 1.15–1.33, conical, light. Protoconch seemingly smooth, of ca 1 whorl ca 0.20 mm in width. Teleoconch of 6–10 (7) slightly convex whorls. Sculpture of 5–6 (7) flat, spaced abapical spiral cords of about the same strength, and an evident peripheral cord formed by 2–3 (3) merged cordlets; peripheral cord visibly rippled on first two/tree whorls of teleoconch, flat on the others remaining. Suture incised. Teleoconch surface covered by barely visible prosocline growth striae, irregularly set. Base convex, with 5–6 (6) regularly spaced, basal spiral cords large and flat, umbilicus closed also in juveniles, covered with a white callus. Aperture quadrangular, with the columellar callus thickened in the middle portion. Interior of the aperture whitish, nacreous.

paratype E, height 5.0 mm, Porto Moniz, Madeira Island. P–R. J. swinneni Mariottini, Oliverio & Smriglio sp. nov., MNHN-IM-2000-403009, holotype, height 6.5 mm, Arinaga (27°51′21.24″ N, 15°23′46.61″ W), Gran Canaria, Canary Islands, low tide, on rocky plateau with small stones (legit Frank Swinnen and Martin Coysman, 2016). S–T. J. baudoni (Monterosato, 1891), MCZR- 00218/L, lectotype, height 6.5 mm, Paulilles, France. U. J. baudoni, MCZR- 00218/P, paralectotype, height 4.7 mm, Paulilles, France. V–X. J. elenchoides Monterosato, 1884, CS-PM, height 7.4 mm, Daçta (Turkey), on P. oceanica, 15 m depth. Scale bars = 2 mm.

COLOURATION. Colour of protoconch and initial teleoconch whorls greyish-whitish; remaining whorls and base cream with alternating dull pinkish-brownish-reddish longitudinal and opisthocline flammules of different size and irregularly arranged.

SOFT PARTS. Not observed.

Distribution

Madeira (Curini-Galletti 1990; Cretella 1992), empty shells in shallow waters or beached.

Remarks

Monochrome specimens are known (Curini-Galletti 1990). Jujubinus vexationis can be distinguished from J. vulgaris, J. exasperatus and J. pseudogravinae by its spiral cords without tubercles and the interspaces furrowed by dense prosocline lines; additionally, J. vexationis has the sutural cord tuberculate in the first 2–3 teleoconch whorls, a feature never present in the three other species. See under J. gravinae, J. errinae Smriglio, Mariottini & Giacobbe, 2016 and J. superum sp. nov. for comparative remarks.