Triforis (Mastonia) lamberti Hervier, 1898

Albano, Paolo G., Franco, Davide Di, Azzarone, Michele, J., Piet A., Bakker & Sabelli, Bruno, 2023, Review of the types of Indo-Pacific Triphoridae (Mollusca, Gastropoda) in the Muséum national d’Histoire naturelle, Paris, Zoosystema 45 (2), pp. 13-106 : 38-40

Triforis (Mastonia) lamberti Hervier, 1898 ( Fig. 19 )

Triforis (Mastonia) lamberti Hervier, 1898: 262 , illustrated by Hervier (1899: pl. 17, fig. 7).

TYPE LOCALITY. — Lifou, New Caledonia.

TYPE MATERIAL. — Syntype. New Caledonia • MNHN-IM-2000-1431; 1 specimen; from type locality.

ORIGINAL DESCRIPTION. — T. sinistrorsa , ovato-elongata, turgidula, apice acuminata; solida, nitidè rosea, subviolacea, in lira inferiore luteo et albo articulata. Anfractus circa 15, concavi, sutura lineari undulatim discreti, bilirati, in inferioribus 3 anfr. lirula intermedia ornati. Lirae aequales, gemmiferae, propé suturas decurrentes; gemmae rotundae, subdistantes, nitidae; interstitia concava, eximiè et tenuiter decussata. Ultimus anfractus convexus, ad ortum canalis depressus et subplanatus, 5 seriebus gemmiferis cingulatus, prima majore, inferioribus 3 luteo articulatis. Canalis brevis, obliquè recurvus, unicarinatus, semiclausus, luteo tinctus. Apertura obliquè piriformis, lateraliter fissurata. Columella angulata, supernè planulata, infernè crassiuscula. Labrum obliquè directum, subrotundum, angulosè infrà ad canalem et suprà ad columellum adhaerens. — Long. 5-8 mill.; diam. max. 2.25-3 mill.

Hab. lnsula Lifou. Vidi 5 specimina, à R. P. Goubin, S. M., collecta.

TRANSLATION OF THE LATIN TEXT. — Sinistral shell, ovate and elongated, broad, acute apex; solid, light pink, slightly violet, yellow and white on the inferior spiral cord. Whorls about 15, concave, separated by a linear and waved suture, with two spiral cords, three inferior whorls adorned by an intermediate spiral cord. Spiral cords are equal, tubercled, extending near the suture; tubercles are rounded, slightly spaced, bright; interspaces are concave, finely and slightly decussated. Last whorl convex, depressed and slightly flattened near the siphon, adorned by five series of tubercles, the first series is larger, the inferior three are distinctly yellow. The siphon is short, obliquely curved, with one keel, partly closed, coloured in yellow. Aperture is obliquely pyriform, laterally fissured. Columella is angled, flattened above, slightly swollen below. Lip obliquely directed, slightly rounded, angled below near the siphon and attached to the columella above. — Length 5-8 mm; maximum diameter 2.25-3 mm.

Locality: Lifou Island. I saw 5 specimens collected by R. P. Goubin.

DIAGNOSIS. — Shell cyrtoconoid. Syntype 6.6 mm high.Teleoconch of c. 8 whorls. Three spiral cords present, the second appearing on the seventh whorl. First and third cords with tubercles at the intersections with orthocline axial ribs. Second cord initially as a smooth fine thread, but later developing tubercles. Microsculpture of very fine spiral and axial threads crossing each other, giving a reticulate pattern. Peristome with additional cords below the second and third cord. Base with two additional cords which begin smooth and develop flat tubercles. Teleoconch pinkish with the third cord and the cords at the base with brown and white spots.

Figures

FIG. 19. — Triforis (Mastonia) lamberti Hervier, 1898, Lifou, New Caledonia: A, original figure in Hervier (1898); B-G, J, K, syntype, MNHN-IM-2000-1431; front (B, C), side (D, E), back (F), microsculpture (G), peristome (J, K); H, I, original labels. Scale bars: B-F, J, K, 1 mm; G, 0.2 mm.