Notosinister rufotinctus Kosuge, 1963

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

Notosinister rufotinctus Kosuge, 1963

Figure 61

Notosinister rufotinctus Kosuge 1963a: 249, pl. 16, fig. 26, text figs 6, 7.

Type locality.

Ankyaba, Setouchi-machi, Amami Islands.

Type material.

Holotype: TZM Mo. 13065 (fide Kosuge 1963a; not seen, illustrated in Higo et al. 2001: 51, G1719). Paratype: NHMUK 1966146: 1 specimen, Amami Islands, Japan .

Original description.

Shell rather small, somewhat spindle·form, tapering to the summit and narrowed at the base. Protoconch conical, acuminate, of 5 whorls, keeled by a single carina with crossed fine axial threads. Mature whorls 10, suture distinct and grooved in somewhat deep channel. Sculpture consists of 3 rows of granules; middle row slender, about half as large as the other two rows, turns to a thread and disappears at the early 3 or 4 whorls; upper and lower rows large and equal in size. Granules almost round, connected by broad axial columns and spiral keels which are regularly latticed, interspaces between them squarely excavated, apart from each other by about half of its diameter and 21 to a whorl. Body whorl has 5 rows of granules, upper-most row largest, next 2 rows nearly equal in size and about half as large as the upper one, fourth row on the periphery and fifth one on the base more slender than the others. Anterior canal rather short and slightly recurved backward. Colouration olive ochre, tinted among the granules underside of lower spiral keel of each whorl with deep reddish brown and protoconch chocolate.

Shell length: 5.2 mm.

Remarks: This species is distinct by its spindle form and colouration, and somewhat related to Triphora clemens (Hinds), though differs in its sculpture.

Figures

Figure 61. Notosinister rufotinctus Kosuge, 1963, Amami Islands, Japan. A-E, G, I, J Paratype, NHMUK 1966146: front (A, B), side (C, D), back (E), protoconch (G), aperture (I), peristome (J). F Original figure. H NHMUK label. Scale bars: A-E, I, J: 0.5 mm; G: 0.2 mm.