Triphoris (Ino) asperrimus 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) asperrimus Hinds, 1843

Figure 19

Triphoris (Ino) asperrimus Hinds 1843b: 18, not illustrated. Illustration available in Hinds (1844): 29, pl. 8, fig. 10.

Type locality.

New Guinea.

Type material.

Holotype: NHMUK 1879.2.26.203, fixed by monotypy (coll. E. Belcher) .

Original description.

Testa gracili attenuata; anfractibus 24-26, superne valde coarctatis, inferne angulatis, serie duplici granulorum; prope suturam granuloso-carinata. Axis 6 lin.

Geog. New Guinea; dredged from a muddy bottom in 8 fathoms.

The only specimen of this species in the collection has an injured mouth. It is remarkable for its long needle-like shape; and the upper portion of each whorl being strangulated, and the lower angular and with a series of tubercles, the shell has a very rough and jagged appearance.

Translation of the Latin text.

Slender shell; 24-26 whorls, very narrow upper portion and angulated lower portion, with two series of tubercles; near the suture a granulated carina. Height 6 lines.

Diagnosis.

Holotype 8.5 mm high and bearing 13 whorls, but the specimen lacks several apical whorls. The shell is extremely elongated. Teleoconch whorls have three tuberculated spiral cords, the first is smaller and appears later along the spire; the third is the most prominent. A suprasutural smooth cord is visible in the last whorls. The holotype is a subadult, and thus its peristome, sinuses, and base cannot be described. The apex is missing too. The teleoconch is white.

Figures

Figure 19. Triphoris asperrimus Hinds, 1843, New Guinea, coll. E. Belcher. A-F Holotype, NHMUK 1879.2.26.203: front (A, B), side (C), back (D), microsculpture (E), original labels (F). G Figure in Hinds 1844. Scale bar: A-D: 1 mm; E: 0.2 mm.