Triphoris distinctus Deshayes, 1863

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 : 16-19

Triphoris distinctus Deshayes, 1863

( Fig. 4 )

Triphoris distinctus Deshayes, 1863: 103 , pl. 11, figs 30, 31.

TYPE LOCALITY. — Cap La Houssaye, Saint Paul, La Réunion.

TYPE MATERIAL. — Neotype. Reunion Island • MNHN-IM-2000-9489, designated by Jay (2007).

ADDITIONAL MATERIAL. — Reunion Island • MNHN-IM-2012-36201; 1 specimen; La Réunion (coll. M. Jay).

ORIGINAL DESCRIPTION. — T. testa elongato-turrita , per longitudinem paulo convexa, omnino fusca, apice acuminata; anfractibus tredecimis, angustis, lente crescentibus, sutura profunda junctis, trifariam transversim, inaequilater granulosis, ultimo anfractu brevi, ad peripheriam subangulato, basi depresso, bisulcato; apertura circulari, canali breviusculo, aperto, obliquo, terminata.

[Latin diagnosis followed by a discussion in French]

TRANSLATION OF THE LATIN TEXT. — Elongated and turreted shell, slightly longitudinally convex, completely brown, sharp apex; thirteen whorls, narrow, slowly increasing in size, with a deep suture and with three spiral cords unequally granulated, short last whorl, subangular at the periphery and depressed at the base, with two grooves; rounded aperture ending with a short, open and oblique siphon.

DIAGNOSIS. — Shell cyrtoconoid with flat sides. Neotype 5.9 mm high. Teleonconch of 12 whorls. Three spiral cords present, the second appearing on the seventh whorl. Cords with tubercles at the intersection with slightly prosocline axial ribs. Second cord initially as a fine thread, then developing tubercles. Peristome without additional cords. Base with three additional smooth or weakly tubercled spiral cords. No visible microsculpture in interspaces. Multispiral protoconch of c. 4 whorls bearing one strong spiral keel and several equally strong axial riblets on the second to fourth whorl. First two teleoconch whorls white, the other brown with darker interspaces. Protoconch light brown.

REMARK. — Neotype illustrated in colour in Jay (2007).

Figures

FIG. 4. — Triphoris distinctus Deshayes, 1863, La Réunion; A, original figure in Deshayes (1863); B-F, Neotype MNHN-IM-2000-9489; front (B), side (C), protoconch (D), teleoconch microsculpture (E), first protoconch whorl (F); G-P, MNHN-IM-2012-36201 (coll. M.Jay): front (G, H), side (I, J), back (K), protoconch (L, M), peristome (N, O), teleoconch microsculpture (P). Scale bars: B, C, G-K, 1 mm; D, E, L, M, 0.2 mm; F, 0.1 mm; N, O, 0.5 mm; P, 0.4 mm.