Triphoris affinis 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 affinis Pease, 1861

Figure 72

Triphoris affinis Pease 1861: 434, not illustrated.

Type locality.

"Sandwich Islands" (Hawaiian Islands).

Type material.

Lectotype: NHMUK 1962808 (coll. H. Cuming) (lectotype selection by inference of holotype by Kay (1965)) .

Original description.

Shell elongately turreted, shining; whorls composed of three regular-sized rows of granules; canal short, tubular. Colour reddish brown.

Diagnosis.

Lectotype 6.4 mm high. Shell conical with flat whorls. Teleoconch of 13 whorls with three tubercled spiral cords of which the first is weaker on the very first whorls. A very fine smooth suprasutural cord is also visible on the lower whorls. Almost orthocline axial ribs intersect the spiral cords to form the tubercles. Fine growth striae are visible in the interspaces. The last whorl has a fourth spiral cord between the second and the third. The peristome is broken. The siphonal canal is very short. The base has three smooth additional spiral cords. The holotype protoconch is clearly multispiral with at least three whorls, but it is apically very worn and thus it is difficult to precisely quantify the number of whorls. The last two are ornamented by two spiral keels and axial riblets. The shell is brown.

Remarks.

This name is preoccupied by T. affinis Hinds, 1843. Therefore, Jousseaume (1884) introduced a new name, Mastonia peasi .

Figures

Figure 72. Triphoris affinis Pease, 1861, Hawaiian Islands, coll. H. Cuming. A-H, J Lectotype NHMUK 1962808: front (A, B), side (C, D), back (E), protoconch (F, G), aperture (H), peristome (J). I Original labels. Scale bars: A-E: 1 mm; F, G: 0.2 mm; H, J: 0.5 mm.