Dermomurex (Trialatella) pruvosti, 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 : 846

Dermomurex (Trialatella) pruvosti n. sp.

( Figs 3 A-D; 4 B; 11 C)

TYPE MATERIAL. — Holotype ( MNHN IM-2000-27726 ) ; one paratype ( MNHN IM-2000-27727 ) KARUBENTHOS 2012: stn GN01, 16°22.4’N, 61°35.6’W, at 80 m deep, Fajou Island ; one paratype (coll. DL), East of Fajou Island , in 80-90 m deep.

TYPE LOCALITY. — Guadeloupe, Fajou Island , 16°22.4’N, 61°35.6’W (stn GN01), at 80 m deep.

ETYMOLOGY. — Named in honour of Laurent Pruvost.

DESCRIPTION OF THE HOLOTYPE

Protoconch of 1.25 whorls. Teleoconch biconic, H 10.2 mm, D 5.7 mm. High spire of five whorls. Last whorl rounded, 73% of the total length of teleoconch. Apical angle of 55°. Spiral sculpture consisting in marked primary cords.Appearance of P1 and P2 since the third whorl.IP on the sutural ramp. Convex part of the whorl:P1, P2, P4 well developed, P5 smaller, P3 atrophied. Siphonal canal: P6, ADP and MP. On four first whorls: six protovarices. On fourth whorl: gradual appearance of three varices and three intervarical ribs (intercalated between two varices). On last whorl: four varices and three intervarical ribs (intercalated between two varices). Aperture ovate. Columellar lip smooth and slightly erected anteriorly. Outer lip crenulated and flared. Internal denticles D1, D2, D3, D4 and D5 simple. Siphonal canal open, dorsally recurved and up to 23% of total length of teleoconch. Microsculpture: thin spiral threads on the whole surface of the shell. Intritacalx cancellate. Shell brown under a creamy intritacalx. Aperture brown with darker denticles. Operculum and radula unknown.

COMPARISON (SEE ALSO TABLE 1 )

In comparison with Dermomurex (Trialatella) abyssicola (Crosse, 1865) ( Fig. 3I, J ), a species ranging from Bahamas to Brazil between 0.5 m and 20 m deep, D. (T.) pruvosti n. sp. differs by a nodulose sculpture formed by small protuberances at the intersection between the varices and the primary cords. Dermomurex (T.) pruvosti n. sp. is also distinguishing from D. (T.) abyssicola by developed wing-like varices and by an atrophied P3 on the convex part of the whorl. D. (T.) pruvosti n. sp. is brown, instead yellow-whitish in D. (T.) abyssicola .

Figures

FIG. 3. — A-D, Dermomurex (Trialatella) pruvosti n. sp.: A-C, ventral, profil and dorsal views, holotype MNHN IM-2000-27726, Fajou Island,at 80 m deep;D, ventral view,paratype,coll.DL,East of Fajou Island,in 80-90 m deep;E-H, D. (T.) fajouensis n. sp.; E, F, ventral and dorsal views, holotype MNHN IM-2000-27733,East of Fajou Island, at 80 m deep; G, H, ventral and dorsal views,paratype MNHN IM-2000-27734, East of Fajou Island, at 80 m deep; I, J, ventral and dorsal views, D. (T.) abyssicola (Crosse, 1865), coll. DL, South Rocroy, Guadeloupe,at 7 m deep; K, L, ventral and dorsal views,D. (T.) tararensis n. sp.,holotype MNHN IM-2000-27728,Anse Tarare, at 60 m deep; M, ventral view, D. (T.) oxum Petuch, 1979, holotype USNM 780648,Abrolhos Archipelago,Bahia State, Brazil,at 25 m deep,photo courtesy of E. Strong (USNM); N-P, ventral, profil and dorsal views D. (T.) boucheti n. sp.,holotype MNHN-IM-2013-8857, East of Petite Terre Island, at 95 m deep. Scale bars: 5 mm.

FIG. 4. — Intritacalx of Dermomurex (Trialatella): A, D. (T.) abyssicola (Crosse, 1865), coll. DL, South Rocroy, Guadeloupe, 7 m deep. B, D. (T.) pruvosti n. sp., holotype MNHN IM-2000-27726, Fajou Island, at 80 m deep; C, D. (T.) boucheti n. sp., holotype MNHN- IM-2013-8857, East of Petite Terre Island, at 95 m deep; D, D. (T.) fajouensis n. sp., holotype MNHN IM-2000-27733, East of Fajou Island, at 80 m deep; E, D. (T.) tararensis n. sp., holotype MNHN IM-2000-27728, Anse Tarare, at 60 m deep. Scale bar: 1 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.