Triphoris triticea Pease, 1861

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 triticea Pease, 1861

Figure 79

Triphoris triticea Pease 1861: 433, not illustrated.

Type locality.

"Sandwich Islands" (Hawaiian Islands).

Type material.

Lectotype: NHMUK 1962807 (coll. H. Cuming) (lectotype selection by inference of holotype by Kay (1965)) .

Original description.

Shell minute, fusiformly ovate, ornamented throughout by spiral rows of regular-sized granules; aperture oval and in a line with the axis of the shell, lip slightly recurved and thickened (plicate on the inner side?); canal posterior, enclosed, tubular. Colour dark purplish-red, granules dusky white.

Diagnosis.

Holotype 2.7 mm high. Shell cyrtoconoid, rather broad with flat whorls. The apex is broken off but the teleoconch (likely complete) has seven whorls with two spiral cords with large tubercles at the intersections with slightly opisthocline axial ribs. Growth lines are occasionally visible. The peristome has a deep posterior sinus and an additional tubercled spiral cord developing in second position on the last half of the last whorl. The siphonal canal is very short. The base has three additional tubercled spiral cords. The protoconch is missing. Teleoconch background colour dark brown, except the first two-three whorls which are yellowish. Tubercles progressively lighter along the shell until becoming pearl-grey on the last whorl. Interspaces usually darker except on the last whorl whose first spiral cord is entirely white.

Figures

Figure 79. Triphoris triticea Pease, 1861, Hawaiian Islands, coll. H. Cuming. A-F, H Lectotype NHMUK 1962807: front (A, B), side (C, D), back (E), aperture (F), peristome (H). G Original labels. Scale bars: A-E: 0.5 mm; F, H: 0.3 mm.