Triphora armillata Verco, 1909

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

Triphora armillata Verco, 1909

Figure 105

Triphora armillata Verco 1909: 283-284, pl. XXII, fig. 5.

Type locality.

Gulf St Vincent, South Australia.

Type material.

Lectotype: SAM D.13448 (fide Marshall 1983; not seen, see Remarks). Paralectotypes: NHMUK 1910.3.29.40-42, 3 specimens, Gulf St Vincent, South Australia .

Original description.

Shell solid, elongate-conic. Protoconch of 4 whorls, convex, centrally carinate, the fourth with two approximate carinae; crowded fine axial bars, concave forward above the carinae, straight below. Spire-whorls twelve, sloping, the first four with two spiral rows of pearls; in the fifth a lira appears between them, and becomes gradually as large as the others; the tubercles are large, about twenty in a row in the penultimate, joined by short bars transversely, and by narrower axial bars directed obliquely forwards towards the lower suture. Sutural spaces distinct, as wide as a pearl row; in the eighth a supra-sutural thread arises, which grows distinct and slightly tuberculate. Base flatly convex, with the sutural lira, and two basal lirae; the first with valid transversely oval tubercles, joined by very broad axial bands to much lower tubercles in the second, and by vanishing bands to the nearly smooth third lira. Aperture round, pinched at the suture into a sinus, and with a short well recurved canal in front; outer lip thin, simple, slightly reflected at its margin, retrocurrent at the suture, crossing the columella in front and flattened out over the base of the canal, so as to close it here. The outer lip has eight nodulous spirals on its outer surface, viz., three as on the spire, the peripheral and one basal, and three others intercalated on the bodywhorl. Colour, protoconch light-brown, shell white, but for the fifth and sixth whorls which are dark-brown, so as to form a sort of bracelet, whence the name.

Dim.- Length, 7,9 mm.; breadth, 2,2 mm.

Locality.- Type, Gulf St. Vincent, dredged in 20 fathoms, with many other good ones; also in 6 and in 15 to 20 fathoms off St. Francis Island, 9 good in each; in 22 fathoms, Investigator Strait, 2 good and 4 poor; in 22 fathoms, outside Backstairs Passage, 3 poor; in 40 fathoms off Beachport, 2 moderate, 3 poor; in 55 fathoms off Cape Borda, 4 poor. Also taken on the beach in Gulf St. Vincent, Venus and Scales Bay, West Coast, and many and good on St. Francis Island. It is a shallow-water species, ranging up to about 40 fathoms.

Remarks.

Verco referred to a type series consisting of multiple specimens in the original description of T. armillata . Marshall (1983) reported the “holotype” in SAM, but this should be considered a lectotype designation according to Article 74.6 of the Code ( ICZN 1999). The NHMUK collection register reports the type locality and the wording “Co-types”, which suggests that the accompanying specimens are part of the type series. Because of Marshall’s lectotype designation, these and all other syntypes are now paralectotypes.

Figures

Figure 105. Triphora armillata Verco, 1909, Gulf St. Vincent, South Australia. A Original figure. B, C NHMUK 1910.3.29.40: front (B), back (C); D NHMUK 1910.3.29.41: front; E NHMUK 1910.3.29.42 front. Scale bar: 1 mm (photo courtesy: Kevin Webb, NHMUK Photographic Unit).