Triphoris festivus A. Adams, 1854

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 festivus A. Adams, 1854

Figure 4

Triphoris festivus Adams 1854: 278, not illustrated.

Type locality.

Port Lincoln, Australia.

Type material.

Lectotype: NHMUK 196559, designated by Marshall (1983) (coll. H. Cuming). Paralectotype: NHMUK 196560: 1 specimen, Port Lincoln, Australia (coll. H. Cuming) .

Original description.

T. testâ pyramidali, basi planâ fuscâ, albidâ, fasciis fuscis interruptis, transversis, ornatâ; anfractibus planis, cingulis duabus granorum instructis; interstitiis valde punctatis.

Hab. Port Lincoln. Mus. Cuming.

A small prettily-marked species, with two rows of granules on each whorl, and the interstices deeply punctured.

Translation of the Latin text.

Pyramidal shell with a flat dark base, whitish with dark interrupted spiral bands; flat whorls with two rows of granules; interstices deeply punctured.

Diagnosis.

Lectotype and paralectotype 3.2 mm and 4.4 mm high, respectively, but both specimens are subadults without a fully developed last whorl. Shell conical with flat sides. Type specimens of eight whorls, an underestimate due to their subadult stage. Each whorl bears two main spiral cords with well-defined tubercles; from the sixth whorl, a fine cord runs between them. Orthocline axial ribs are present and strong. The peristome, the sinuses, the siphonal canal and the base are missing in both type specimens. The lectotype bears the last whorl and half of the protoconch which is clearly multispiral, adorned by two spiral keels and brownish in colour. The teleoconch has a white background. Beginning on the third whorl, brown blotches are present on the first spiral cord.

Remarks.

In the same box, a third vial is present with a small worn specimen which is not this species, as already noted by Peter Dance in a handwritten annotation in 1965. The lectotype inventory number 16559 in Marshall (1983) is a mistyping.

Figures

Figure 4. Triphoris festivus A. Adams, 1851, Port Lincoln, S. Australia, coll. H. Cuming. A-F Lectotype NHMUK 196559: front (A-B), side (C), back (D), protoconch (E-F). G Paralectotype, NHMUK 196560: front (G). H Original labels. Scale bars: A-D, G: 0.5 mm; E, F: 0.1 mm.