Triphoris mirificus 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 : 22-24

Triphoris mirificus Deshayes, 1863

( Fig. 7 )

Triphoris mirificus Deshayes, 1863: 104 , pl. 11, figs 32, 33.

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

TYPE MATERIAL. — Neotype. Reunion Island • MNHN-IM-2000-9491, designated by Jay (2007).

ADDITIONAL MATERIAL. — MNHN-IM-2012-36198; 6 specimens; from type locality (coll. M. Jay).

ORIGINAL DESCRIPTION. — T. testa elongato-angusta , turrita, apice acuminata, albo-lutescente; anfractibus quindecimis, angustis, lentissime crescentibus, liris duabus inaequalibus granulosis pellucidis, ornatis, ultimo longiusculo quadrifariam granuloso, basi depresso; apertura minima , circulari, posterius canali praelongo terminata, canali antico elongato, omnino clauso, valde obliquo.

[Latin diagnosis followed by a discussion in French]

TRANSLATION OF THE LATIN TEXT. — Elongated and narrow shell, turreted, with a sharp apex, white-yellowish; fifteen narrow whorls, growing very slowly, with two spiral cords adorned by translucent and unequal granules, quite high last whorl with four spiral cords of granules and depressed at the base; small aperture, rounded, posterior siphon quite long, the anterior siphon is elongated, completely closed and strongly oblique.

DIAGNOSIS. — Shell very elongated with flat sides. Neotype 7.2 mm high. Teleoconch of 15 whorls. Two spiral cords present with the lower being more prominent. Cords with strong tubercles at the intersections with slightly prosocline axial ribs. Microsculpture of very fine spiral threads, but only present on the upper half of the intersections between the cords. Peristome with up to three additional cords, one between the first and second cord, and two below the second cord. Posterior sinus well developed and protruding as a long canal. Siphonal canal long as well. Base with one additional tubercled cord. Multispiral protoconch of c. 5.5 whorls with two strong spiral keels and strong axial riblets. Nucleus with two keels and fine axial riblets on the second whorl. First two teleoconch whorls white, the following ones with light brown flammulae on a white background, intersections between tubercles light brown. Protoconch brown.

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

Figures

FIG. 7. — Triphoris mirificus Deshayes, 1863, La Réunion: A, original figure in Deshayes (1863); B-G, Neotype MNHN-IM-2000-9491; front (B), side (C), protoconch (D), teleoconch microsculpture (E), peristome (F), first protoconch whorl (G); H-R, MNHN-IM-2012-36198 (coll. M. Jay): front (H, I), side (J, K), back (L), protoconch (M, N), first protoconch whorl (O), peristome (P-Q), teleoconch microsculpture (R). Scale bars: B, C, H-L, 1 mm; F, P-Q, 0.5 mm; E, R, 0.4 mm; D, M, N, 0.2 mm; G, O, 0.05 mm.