Triphoris (Mastonia) roseus 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 (Mastonia) roseus Hinds, 1843

Figure 35

Triphoris (Mastonia) roseus Hinds 1843b: 21, not illustrated. Illustration available in Hinds (1844): 31, pl. 8, fig. 19.

Type locality.

"Pacific Ocean?"

Type material.

Syntypes: NHMUK 1879.2.26.212: 1 specimen, South Pacific Ocean (coll. T. Lombe Taylor) .

Original description.

Testa ovali; anfractibus decem biseriatim granulosis, seriebus corneis, medio laevigato roseo serie tertia parva; apertura rotundata. Axis 3½ lin.

Geog. Pacific Ocean? Cab. Metcalfe.

Translation of the Latin text.

Shell oval; 10 whorls with two granulated brownish cords; in the middle, a third small smooth pink cord; rounded aperture. Height 3½ lines.

Diagnosis.

Syntype 5.5 mm high. Shell conical with 10 visible flat whorls, but the apical part is missing. Two main spiral cords run on the whorls; a third develops in between, initially as a fine thread and then as a fully-grown cord on the last whorl. Large, subrectangular tubercles are present at the intersection with slightly prosocline axial ribs. The last whorl and the base have three additional weakly tuberculated spiral cords. Very fine microsculpture is visible between the main spiral cords and axial ribs. The peristome has a very shallow posterior sinus and apparently does not bear additional spiral cords. The protoconch is missing in the syntype. Teleoconch light orange with pink to pearly lower spiral cords.

Figures

Figure 35. Triphoris roseus Hinds, 1843, South Pacific Ocean, coll. T. Lombe Taylor. A-I Syntype NHMUK 1879.2.26.212: front (A, B), side (C, D), back (E), peristome (F, G), microsculpture (H), original labels (I). J Figure in Hinds 1844. Scale bars: A-E: 1 mm; F, G: 0.5 mm; H: 0.2 mm.