Triphoris (Ino) concors 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) concors Hinds, 1843

Figure 26

Triphoris (Ino) concors Hinds 1843b: 17, not illustrated. Illustration available in Hinds (1844): 28, pl. 8, fig. 2.

Type locality.

Straits of Malacca.

Type material.

Lectotype: NHMUK 1844.6.7.27/1, here designated (coll. E. Belcher). Paralectotypes: NHMUK 1844.6.7.27/2: 1 specimen, Straits of Malacca (coll. E. Belcher) ; NHMUK 1879.2.26.200/1: 1 specimen (broken into two parts), Straits of Malacca (coll. T. Lombe Taylor) .

Original description.

Testa cylindracea; anfractibus viginti-duo triseriatim granulosis; serie media paululum minima; sutura lineata; apertura rotundata; sinu laterali tubiformi. Axis 6 lin.

Geog. Straits of Malacca; in 18 fathoms.

Translation of the Latin text.

Cylindrical shell; twenty-two whorls with three rows of granules; the median a little bit smaller; linear suture; rounded aperture; tubiform posterior sinus. Height 6 lines.

Diagnosis.

Lectotype 10.4 mm high. Shell cyrtoconoid, with 20 flat-sided whorls with three spiral cords with tubercles. The second row develops later on the spire and on the last whorls a fourth smooth suprasutural cord is visible. Slightly prosocline axial ribs intersect the spiral cords forming the tubercles. Numerous fine spiral striae are visible between the main cords on the lower whorls. Additional spiral cords are visible on the peristome. The posterior sinus is tubular. The base has no additional spiral cords. The protoconch is absent in the type series, but a small remnant suggests it to be brown and multispiral. The teleoconch is dirty white.

Remarks.

Lot NHMUK 1879.2.26.200 contains also one subadult specimen that is broader, bears a different sculpture, and thus may not be this species. The lectotype was thus designated to univocally define the morphology of this taxon and stabilize the nomenclature. The lectotype is the best preserved specimen and the only one to bear remnants of the protoconch,

Figures

Figure 26. Triphoris concors Hinds, 1843, Straits of Malacca, coll. E. Belcher. A-E, G-I Lectotype NHMUK 1844.6.7.27 / 1: front (B, C), side (A, D), back (E), original labels (G), peristome (H), microsculpture (I). F Figure in Hinds 1844. Scale bars: A-E: 2 mm; H, I: 0.5 mm.