Notosinister tessellatus 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 tessellatus Kosuge, 1963

Figure 64

Notosinister tessellatus Kosuge 1963a: 243 and 245, pl. 16, fig. 28, text fig. 4.

Type locality.

Ankyaba, Setouchi-machi, Amami Islands.

Type material.

Holotype: TZM Mo. 13070 (fide Kosuge 1963a; not seen, illustrated in Higo et al. 2001: 51, G1723). Paratype: NHMUK 1966147: 1 specimen, Amami Islands, Japan .

Original description.

Shell of medium in size, conica1, tapering to the summit, lower part of spire cylindrical. Protoconch with 2 spiral keels and many axial threads. Mature whorls 12, suture distinct as a rather prominent channel. Sculpture consists of 3 rows of granules, upper and lower rows large and equal in size, median row becoming nearly equal to the others on the body whorl and gradually turns to spiral thread as it ascends the spire. Granules small, well rounded, beset close together and 20 to a whorl, connected with oblique axial columns and weak spiral threads. On the body whorl, fourth row of granules encircles the periphery and fifth row the base. Anterior canal strongly recurved backward and encircled by a smooth spiral keel. Colouration of protoconch brown, mature whorl white with squarish brown piltches.

Shell length: 6.5 nun.

Remarks: This species somewhat likes N. quadrimaculatus (Hervier), though differs in colour pattern and shell shape, and also differs from Triphora maculosus Hedley and Triphora ampulla Hedley in colour pattern and protoconch, from Triphora dolicha (Watson) in its sculpture of protoconch.

Figures

Figure 64. Notosinister tessellatus Kosuge, 1963, Amami Islands, Japan. A Original figure. B-H Paratype, NHMUK 1966147: front (B, C), side (D, E), back (F), aperture (G), peristome (H). I NHMUK label. Scale bars: B-F: 1 mm; G, H: 0.5 mm.