Triphoris fucata 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 fucata Pease, 1861

Figure 77

Triphoris fucata Pease 1861: 433-434, not illustrated.

Type locality.

"Sandwich Islands" (Hawaiian Islands).

Type material.

Lectotype: NHMUK 1961171, designated by Kay (1965) (coll. H. Cuming). Paralectotypes: NHMUK 1961172, 1 specimen (see Remarks), Hawaiian Islands (coll. H. Cuming), MCZ 73736, 1 specimen, Hawaiian Islands .

Original description.

Shell elongate subulate; whorls sixteen to eighteen, with three granulose ribs and one much smaller at the suture; base subplanulate; canal short and recurved. Colour white, spotted irregularly with brown.

Diagnosis.

Lectotype 9.5 mm high. Very elongated shell with flat whorls. Apical part broken off. The 17 visible teleoconch whorls have three spiral cords with tubercles and the intersections with slightly prosocline axial ribs. The second spiral cord appears later on the fourth teleoconch whorl. A suprasutural smooth cord is also clearly visible as well as numerous very fine spiral threads between the main cords. The posterior sinus is tubular and prominent. The peristome has additional spiral cords. The siphonal canal is long. The profile of the last whorl at the base is very angulated. The base has no additional cords after the fourth tubercled cord. Protoconch missing. Teleoconch background colour whitish with orange-brown blotches in the first shell half.

Remarks.

Lot NHMUK 1961172 contains two fragments, probably belonging to the single specimen reported by Kay (1965). This species is very similar to T. concors Hinds, 1843 (page 193). The lack of protoconchs impedes a final decision on the synonymy between these two entities.

Figures

Figure 77. Triphoris fucata Pease, 1861, Hawaiian Islands, coll. H. Cuming. A-H Lectotype NHMUK 1961171: front (A, B), side (C, D), back (E), peristome (F, G), aperture (H). I Original labels. Scale bars: A-E: 2 mm; F-H: 0.5 mm