Triphoris (Ino) sculptus 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) sculptus Hinds, 1843

Figure 37

Triphoris (Ino) sculptus Hinds 1843b: 17, not illustrated. Illustration available in Hinds (1844): 28, pl. 8, fig. 3.

Type locality.

Straits of Malacca.

Type material.

Syntypes: NHMUK 1844.6.7.17- 19, 3 specimens, Straits of Malacca (coll. E. Belcher) ; NHMUK 1855.11.15.20, 1 specimen, no locality (coll. E. Belcher) ; NHMUK 1879.2.26.201, 1 specimen, Straits of Malacca (J. Lombe-Taylor coll.) .

Original description.

Testa pallide rufente; anfractibus 15-18 biseriatim granoso-carinatis, medio laevigatis carina secundaria; prope suturam carinula monilifera; sinu laterali patulo. Axis 4½ lin.

Geog. Straits of Malacca; in 3 fathoms.

Translation of the Latin text.

Shell pale reddish; 15-18 whorls with two granulated-keeled cords, with a smooth interspace with a secondary keel; a thin granulated keel near the suture; open posterior sinus. Height 4½ lines.

Diagnosis.

Subadult syntypes ca 9 mm high. Shell conical, with flat whorls bearing two quite thin main spiral cords with large oblong tubercles at the intersection with broad axial ribs. A third very fine spiral cord develops early in the teleoconch but never attains the strength of the other two whereas a fourth smooth cord is visible above the suture. A microsculpture of very fine threads is visible between the main cords. The apex is incomplete, but clearly bears a brown multispiral protoconch whose last two whorls have two strong spiral keels and axial riblets. The teleoconch has a whitish background with orange to brown flammulae.

Remarks.

All available syntypes are subadults without a fully developed last whorl and peristome. Specimens NHMUK 1844.6.7.17 (Fig. 37A, B ) and NHMUK 1844.6.7.19 (Fig. 37H ) are probably those that best fit the figure by Hinds (1844) in terms of sculpture, colour pattern and shell profile. In contrast, NHMUK 1844.6.7.18 (Fig. 37G ) has a much more slender profile and resembles Triphoris bilix Hinds, 1844 (p. 185), NHMUK 1879.2.26.201 (Fig. 37J ) is again more slender and has more numerous tubercles on the third spiral cord, superficially resembling T. concors Hinds, 1844 (p. 193), and NHMUK 1855.11.15.20 might be a Triphoris sculptus , but it is too ruined for proper identification.

Figures

Figure 37. Triphoris sculptus Hinds, 1843. A-E Syntype NHMUK 1844.6.7.17, Straits of Malacca (coll. E. Belcher): front (A, B), protoconch (C, D), microsculpture (E). F Figure in Hinds 1844. G Syntype NHMUK 1844.6.7.18, Straits of Malacca (coll. E. Belcher): front. H Syntype NHMUK 1844.6.7.19, Straits of Malacca (coll. E. Belcher): front. I Syntype NHMUK 1855.11.15.20 (coll. E. Belcher). J Syntype NHMUK 1879.2.26.201, Straits of Malacca (J. Lombe-Taylor coll.). K Original labels NHMUK 1844.6.7.17 - 19. L Original labels lot NHMUK 1855.11.15.20. M Original labels lot NHMUK 1879.2.26.201. Scale bars: A, B: 1 mm; C, D: 0.2 mm; E: 0.5 mm.