Notosinister millepunctatus Kosuge, 1962

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 millepunctatus Kosuge, 1962

Figure 60

Notosinister millepunctatus Kosuge 1962a: 83, pl. 10, fig. 4, text figs 12, 17.

Type locality.

Ankyaba, Setouchi-machi, Amami Islands.

Type material.

Holotype: TZM Mo. 13038 (fide Kosuge 1962a; not seen, illustrated in Higo et al. 2001: 51, G1707). Paratype: NHMUK 1966144: 1 specimen, Amami Islands, Japan .

Original description.

Shell medium in size, conical, acuminate at the summit, narrowed at the base. Protoconch turrited conical, 5 whorls with 2 spiral keels overridden by axial threads, dark brown in colour. Mature whorls 13, suture shallow and not distinct. Sculpture 3 rows of granules at the lower part of the spire, median one smaller than the others, and gradually turns to a thread as it ascends the spire and finally disappears at the early whorls. Granules rather large, apart by half of its diameter and 18 or 20 to a whorl, connected both spirally and axially with each other. On the body whorl, fourth row of cranules on the periphery and another spiral keel on the base, anterior canal short and strongly recurved backward. Colouration is white or pale brown with numerous irrerular dark brown spots.

Shell length: 6.8 mm.

Remarks: This species is closely related to T. dolicha (Watson) and T. turricula (Hervier), though differs in having a protoconch with 2 spiral keels in contrast to 1 keel of the latter two species, and also differs in shell shape.

Figures

Figure 60. Notosinister millepunctatus Kosuge, 1962, Amami Islands, Japan. A Original figure. B-G, I-K Paratype, NHMUK 1966144: front (B, C), side (D, E), back (F), protoconch (G), microsculpture (I), aperture (J), peristome (K). H NHMUK label. Scale bars: B-F: 1 mm; G-I: 0.2 mm; J, K: 0.5 mm.