Triphora fuscozonata G.B. Sowerby III, 1907

Albano, Paolo G., Bakker, Piet A. J. & Sabelli, Bruno, 2019, Annotated catalogue of the types of Triphoridae (Mollusca, Gastropoda) in the Natural History Museum of the United Kingdom, London, Zoosystematics and Evolution 95 (1), pp. 161-308 : 161

Triphora fuscozonata G.B. Sowerby III, 1907

Figure 94

Triphora fuscozonata G.B. Sowerby III 1907: 301, pl. 25, fig. 8.

Type locality.

New Caledonia.

Type material.

Syntypes: NHMUK 1907.8.28.36: 1 specimen, New Caledonia .

Original description.

Testa sinistrorsa, elongata, acute acuminata, nigro-fusco fasciata; anfractus 18, leviter convexi, gemmis rotundatis confertis biseriatis (lira angusta interveniente) ornate, sutura impressa discreti; ultimus curtus, liris 6 minute gemmulatis, prope basin leviter obliquum; apertura parva, oblique subtrigona; labrum tenue, postice sinuatum. Long. 6, diam. 1.5 mm.

Hab.- New Caledonia.

This species may be recognized by the dark-brown bands on each whorl; the gem-like nodules common to many species are arranged in two prominent rows, with a narrow intervening crenulated ridge; on the last whorl they are smaller and closer, forming six ridges.

Translation of the Latin text.

Elongate sinistral shell with a sharp apex, dark-brown banded; 18 light convex whorls with two rows of gem-like rounded nodules (a narrow intervening ridge), impressed suture; last whorl short, with 6 small gemmulated lirae, slightly slanting near its basis; small aperture, obliquely subtrigonal; thin external lip with a posterior sinum. Length 6, diameter 1.5 mm.

Locality: New Caledonia.

Diagnosis.

Syntype 5.3 mm high. Shell conical with flat whorls. Teleoconch of 12 whorls with three spiral cords with tubercles at the intersection with slightly prosocline axial ribs. The second cord starts in the lower part of the shell as a fine thread and never fully develops to the size of the others. Fine axial threads are visible in the interspaces. Peristome incomplete in the syntype, with faint additional spiral cords. Siphonal canal short. The base bears two additional smooth spiral cords. Protoconch incomplete, but clearly multispiral; the three visible whorls have numerous axial ribs and a single spiral keel. Teleoconch whorls dark brown apically and light brown to whitish abapically. Base very light brown to white, siphonal canal brown. Protoconch hyaline, but worn in the syntype.

Figures

Figure 94. Triphora fuscozonata G. B. Sowerby III, 1907, New Caledonia. A-K Syntype NHMUK 1907.8.28.36: front (A, B), side (C, D), back (E), protoconch (F, G), peristome (H, I), original labels (J) aperture (K). L Original figures. Scale bars: A-E: 1 mm; F, G: 0.2 mm; H, I: 0.3 mm; K: 0.5 mm.