Triphoris (Ino) elegans Hinds, 1843

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

Triphoris (Ino) elegans Hinds, 1843

Figure 28

Triphoris (Ino) elegans Hinds 1843b: 18-19, not illustrated. Illustration available in Hinds (1844): 29, pl. 8, fig. 11.

Type locality.

Straits of Malacca.

Type material.

Syntypes: NHMUK 1879.2.26.197: 1 specimen, Straits of Malacca (J. Lombe Taylor coll.) .

Original description.

Testa alba, fusco marmorata; anfractibus 16-18 quater carinatis; carinis duobus primariis, inferiore maximo; duobus secondariis alternantibus; carinis omnibus maculis albis et fuscis ornatis. Apertura rotundata, sinu laterali patulo. Axis 4½ lin.

Geog. Straits of Malacca; from 20 fathoms, mud.

Translation of the Latin text.

White shell marbled with brown; 16-18 four-keeled whorls; two larger carinae, the greatest in the lower part of the whorl; two smaller carinae alternated; all carinae with white and brown spots. Rounded aperture, open posterior sinus. Height 4½ lines.

Diagnosis.

Syntype 8.1 mm high. Shell cyrtoconoid, with flat sides. Teleoconch with 14 whorls bearing four spiral cords which are smooth, with the exception of the third which is undulated. Spiral microsculpture can be observed between the main cords. The peristome and posterior canal are missing in the holotype. The anterior canal is very elongated and bears two strong smooth spiral cords. The last whorl is strongly angulated at the periphery; the base bears an additional undulated strong spiral cord. The apex is missing in the holotype, but remnants of the last protoconch whorl point to a multispiral type. Such last whorl has two spiral keels and axial riblets. The teleoconch has a white background with brown to orange flammulae; the protoconch visible last whorl is brown.

Figures

Figure 28. Triphoris elegans Hinds, 1843, Straits of Malacca, J. Lombe-Taylor coll. A-G Syntype NHMUK 1879.2.26.197: side (A, B), front (C), back (D), protoconch (E), microsculpture (F), original labels (G). H Figure in Hinds 1844. Scale bars: A-D: 1 mm; E: 0.1 mm; F: 0.5 mm.