Typhinellus lamyi, Garrigues & Merle, 2014

Garrigues, Bernard & Merle, Didier, 2014, Nine new species of Muricidae Rafinesque, 1815 (Mollusca, Gastropoda) from the French Antilles, Zoosystema 36 (4), pp. 841-864 : 844

Typhinellus lamyi n. sp.

( Figs 2 A-F; 11 A)

TYPE MATERIAL. — Holotype ( MNHN-IM-2013-7776 ), DNA sequenced (GenBank no. KJ591665 ), KARUBENTHOS: stn GD35, Port Louis , 16°22.77’N, 61°34.19’W, at 66 m deep ; one paratype ( MNHN-IM-2013-20576 ), DNA sequenced (not tissue-clipped), KARUBENTHOS: stn GD55, Fajou Island , 16°22.48’N, 61°35.46’W, at 85 m deep; one paratype (coll. DL), East of Fajou Island , in 80-90 m deep; one paratype (coll. BG), East of Fajou Island , in 80-90 m deep.

TYPE LOCALITY. — Guadeloupe, Port Louis , 16°22.77’N, 61°34.19’W (stn GD35) at 66 m deep.

ETYMOLOGY. — Named in honour of Dominique Lamy.

DESCRIPTION OF THE HOLOTYPE

Protoconch of 1.75 whorls.Teleoconch, H 13.1 mm, D 5.9 mm. Low spire of fours whorls. Last whorl of 81% of the total length. Shoulder angulation sharp. Apical angle of 85°. Suture impressed crossed by a laminar extension connecting the shoulder spine to the preceding teleoconch whorl. Spiral sculpture: IP on the sutural ramp, P1 corresponding to anal tube, P2, P3, P4 and P5 on convex part of the whorl, P6, ADP, MP on siphonal canal. Primary cords slightly marked near the varices. P1 and P2 appearing since the first whorl. Primary cord spines on IP, P2, P3, P4 and P5. On the last whorl, broad varical flange up to the extremity of siphonal canal. Four ventrally sealed anal tubes (P1 spine), abapically and dorsally recurved, forming an angle of 30° with the axis of the shell. Last tube intact, others cut down. Axial sculpture: four varices since the first whorl. Aperture rounded. Columellar lip smooth, erected.No anal sulcus. Outer lip erected and smooth within. Siphonal canal winding, ventrally sealed, dorsally curved, up to 40.4% of the total length. Microsculpture of growing grooves. Shell chocolate, beige and white. Anal tubes (P1), siphonal canal and aperture whitish. Several dark blotches on the ventral part of the siphonal canal (3 blotches) and the outer lip (4 blotches). Operculum and radula unknown.

COMPARISON

Because of its moderately high shape and its developed cords spines, Typhinellus lamyi n. sp. should be compared with T. occlusus (Garrard, 1963) recorded from the Philippines and New Caledonia (80-200 m deep) and with T. labiatus (Cristofori & Jan, 1832) . Specimens of T. occlusus can resemble T. lamyi n. sp. in bearing three dark blotches on the siphonal canal ( Fig. 2I and Hardy 2014); however, T. occlusus ( Fig. 2I ) differs mainly by a smaller aperture, a longer siphonal canal (45.6 % of the total length) and a larger size up to 25-35 mm (instead 9.5-13 mm). On the biogeographical point of view, T. labiatus is closer to T. lamyi n. sp., both species living in the Atlantic Ocean. The shape of T. labiatus is rather similar to that of T. lamyi n. sp. and as for T. occlusus , several specimens of T. labiatus can resemble T. lamyi n. sp. in bearing three dark blotches on the siphonal canal ( Hardy 2014). T. labiatus ( Fig. 2G, H ) differs by its spiral sculpture; it displays secondary cords spines s2 and s4 missing in T. lamyi n. sp. ( Fig. 11A ).

Figures

FIG. 2. — A-F, Typhinellus lamyi n. sp.: A-C, ventral, profil and dorsal views holotype MNHN-IM-2013-7776, Port Louis (stn GD35) at 66 m deep; D, E, ventral and dorsal views paratype, coll. DL, East of Fajou Island, in 80-90 m deep; F, dorsal view paratype MNHN- IM-2013-20576,Fajou Island,at 85 m deep;G, H, ventral and dorsal views T.labiatus (Cristofori & Jan,1832),coll.BG,Kerkennah (Tunisia), at 1 m deep; I, (ventral view) T. occlusus (Garrard, 1963), coll. BG, Balut Island (Philippines), in 80-150 m deep. Scale bars: 10 mm.

FIG. 11. — Morphology of spiral cords and denticles: A, Typhinellus lamyi n. sp., paratype, coll. DL, East of Fajou Island, in 80-90 m deep; B, Dermomurex (Trialatella) abyssicola (Crosse, 1865), MNHN, Fortune Island, at 1 m deep, KARUBENTHOS 2012, stn GM06, 16° 09’N, 61° 33.67 W; C, D. (T.) pruvosti n. sp., holotype MNHN IM-2000-27726, Fajou Island, at 80 m deep; D, D. (T.) boucheti n. sp., holotype MNHN-IM-2013-8857, East of Petite Terre Island, at 95 m deep; E, D. (T.) fajouensis n. sp., holotype IM-2000-27733, East of Fajou Island, at 80 m deep; F, D. (T.) tararensis n. sp., holotype MNHN IM-2000-27728, Anse Tarare, at 60 m deep. Abbreviations: see Material and methods. Scale bars: 5 mm.