Triphoris cingulifera 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 cingulifera Pease, 1861

Figure 74

Triphoris cingulifera Pease 1861: 434, not illustrated.

Type locality.

"Sandwich Islands" (Hawaiian Islands).

Type material.

Lectotype: NHMUK 1962812, designated by Kay (1965) (coll. H. Cuming). Paralectotypes: NHMUK 1962813, 4 specimens (see Remarks), Hawaiian Islands (coll. H. Cuming); MCZ 50056, 4 specimens, Hawaiian Islands; MCZ 50076, 1 specimen, Hawaiian Islands (see Remarks); MCZ 73737, 25 specimens, Hawaiian Islands .

Original description.

Shell subulate; whorls about ten, ornamented by a row of granules at both margins, interstices concavely rounded, with a raised stria at the upper side, last whorl with three granulose ribs; canal short and tubular. Colour waxy-yellow, lower row of granules and ribs on last whorl purplish-red.

Diagnosis.

Lectotype 5.6 mm high. Shell cyrtoconoid with flat whorls. Teleoconch of nine whorls bearing three spiral cords. The second develops later and remains much thinner than the others all along the teleoconch. These cords bear tubercles and the intersections with the prosocline axial ribs. Growth lines are visible, especially between the ribs. The peristome bears numerous additional spiral cords and a deep posterior sinus. Siphonal canal relatively long. The base has a fourth tubercled spiral cord and two smoother ones. The apex is missing in the lectotype. The teleoconch background colour is yellowish-brown, the third, fourth and fifth spiral cord are dark brown.

Remarks.

MCZ 50056 is erroneously identified as the holotype in the MCZ ledger and in the online catalogue. Pease (1861) did not specify on how many specimens he based his description, but the multiple specimens in the H. Cuming collection suggest that he had more than one on which he based the description. Thus, the “holotype” remark in the MCZ ledger has no support and Kay’s (1965) lectotype designation should be regarded as valid. Kay (1965) listed seven paratypes in lot 1962813, but only four are currently present (as also noted by Kathie Way in 1983 on labels accompanying the shells).

Figures

Figure 74. Triphoris cingulifera Pease, 1861, Hawaiian Islands, coll. H. Cuming. A-H Lectotype NHMUK 1962812: front (A, B), side (C, D), back (E), peristome (F, G), aperture (H). I Original labels. Scale bars: A-E: 1 mm; F-H: 0.5 mm.