Triphoris adamsi 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

Triphoris adamsi Deshayes, 1863

( Fig. 1 )

Triphoris adamsi Deshayes, 1863: 100 , pl. 11, figs 23, 24.

TYPE LOCALITY. — La Réunion.

TYPE MATERIAL. — Syntype. Reunion Island • 1 specimen; MNHN-IM-2000-1579 .

ORIGINAL DESCRIPTION. — T. testa minima , elongato-turgidula, apice acuta, mucronata, omnino castaneo-fusca; anfractibus decimis, plano-convexiusculis, transversim trifariam granulosis, sutura angusta profundaque distinctis; ultimo anfractu brevi, granulorum seriebus quinis ornato; apertura circulari, canali brevissimo et obliquo terminata. [Latin diagnosis followed by a discussion in French]

TRANSLATION OF THE LATIN TEXT. — Small shell, elongated and slightly inflated, with a narrow and pointed apex, completely chestnut-brown; ten slightly convex whorls with three series of granules and a deep, narrow and distinct suture; short last whorl, adorned by a series of five granules; circular aperture, ending with a short and oblique siphon.

DIAGNOSIS. — Shell conical with flat sides. Syntype here figured 5.0 mm high.Teleonconch of 10 whorls. Three spiral cords present, the second appearing on the seventh whorl. First and third cords with tubercles at the intersection with rather prosocline axial ribs. Second cord initially as a fine thread, but later developing thin tubercles. Spiral microsculpture of weakly granulate fine threads. Base with two additional spiral cords; the first granulated and the second smooth. Multispiral protoconch of c. 5 whorls with two strong spiral keels and several equally strong axial riblets. First four whorls of the teleoconch white, the others light brown with darker spiral interspace. The last whorl lighter brown to white. Protoconch brown.

Figures

FIG. 1. — Triphoris adamsi Deshayes, 1863, La Réunion: A, original figure in Deshayes (1863); B-K, syntype MNHN-IM-2000-1579; front (B, C), side (D, E), back (F), protoconch (G, H), teleoconch microsculpture (I), peristome (J, K); L, M, original labels. Scale bars: B-F, 1 mm; G-I, 0.2 mm; J, K, 0.4 mm.