Dermomurex (Trialatella) tararensis, 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 : 849-850

Dermomurex (Trialatella) tararensis n. sp.

( Figs 3K, L ; 4E ; 11F )

TYPE MATERIAL. — Holotype ( MNHN IM-2000- 27728 ), KARUBENTHOS 2012, stn GD69, 16’16.0’N, 61’10.2’W, at 60 m deep.

TYPE LOCALITY. — Anse Tarare , Grande Terre , Guadeloupe, 16’16.0’N, 61’10.2’W (GD69), at 60 m deep.

ETYMOLOGY. — From “Anse Tarare”, Guadeloupe.

DESCRIPTION OF THE HOLOTYPE

Protoconch of 1.25 whorls. Teleoconch biconic, H 7.6 mm, D 4.3 mm. Spire low of four whorls. Last whorl rounded, 75% of the total length of teleoconch. Apical angle of 62°. Spiral sculpture consisting in primary cords, more marked near the varix. On the last whorl: sutural ramp, IP; the convex part of the whorl, P1, P2, P4 well developed, P5 smaller than P4 and P3 atrophied; siphonal canal, P6 and ADP. Axial sculpture with seven varices from the first to the third whorl. Last whorl: six varices and one intervarical rib (between two varices). Aperture ovate. Columellar lip smooth, slightly erected anteriorly. Flaring outer lip with five denticles (D1 to D5). Siphonal canal open, dorsally recurved and up to 27% of the total length of teleoconch. Intritacalx of fine spiral threads. Shell yellow white under a creamy intritacalx. Yellow aperture with orange denticles. Operculum and radula unknown.

COMPARISON (SEE ALSO TABLE 1 )

Dermomurex (T.) tararensis n. sp. differs from D. (T.) abyssicola by a lower spire and by an atrophied P3 on the convex part of the whorl. Dermomurex (T.) pruvosti n. sp. differs from D. (T.) tararensis n. sp. by a more shouldered shell and an acute spire. In addition, the shell of D. (T.) pruvosti n. sp. is brown, whereas it is yellow white in D. (T.) tararensis n. sp. A lower spire, an atrophied P3 and a denticulated outer lip distinguish D. (T.) tararensis n. sp. from D. (T.) fajouensis n. sp. which lacks internal denticles. Moreover, the intritacalx of D. (T.) tararensis n. sp. displays fine spiral threads lacking in D. (T.) fajouensis n. sp. ( Fig. 4D, E ). Dermomurex (T.) tararensis n. sp. is distinguishing from D. (T.) boucheti n. sp. by an atrophied P3, by a denticulate outer lip and by seven varices instead three varices with five intervarical ribs on the last whorl.

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.