Triforis bathyraphe E.A. Smith, 1890

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

Triforis bathyraphe E.A. Smith, 1890

Figure 81

Triforis bathyraphe Smith 1890: 292, pl. 24, fig. 4.

Type locality.

Saint Helena.

Type material.

Syntypes: NHMUK 1889.10.1.1413: 1 specimen, Saint Helena .

Original description.

Testa haud perelongata, albida vel pallide fusca; anfractus 11, convexiusculi, sutura profunda sejuncti, liris spiralibus tribus subaequalibus, lirisque longitudinalibus circiter 26 granose cancellati; anfr. ultimus liris sexcinctus; apertura rotunde ovata; labrum tenue, superne ad suturam anguste sinuatum, inferne columellae junctum; cauda brevis, leviter recurva. Longit. 5 ¾ millim., diam. 2.

This species is peculiar on account of the deep suture and the distinct cancellation of the surface. The whorls, too, are convex, so that the central row of granules are most prominent. It is a much stouter shell than T. recta and has a different aperture.

Translation of the Latin text.

Not very elongated shell, white or pale dark; 11 slightly convex whorls, separated by a deep suture, with three almost equal spiral cords and about 26 longitudinal tuberculated cancellate lirae; last whorl with six rows; roundish ovate aperture; thin lip with a posterior sinus at the suture, joined with columella on the underside; short slightly recurved anterior siphon.

Height 5¾, diameter 2 mm.

Diagnosis.

Syntype 5 mm high. Shell conical with seven slightly convex whorls. The teleoconch with three spiral cords with tubercles at the intersection with almost orthocline axial ribs. A fourth suprasutural smooth cord is visible on the lower whorls. Peristome with no additional spiral cords and an indented posterior canal. Siphonal canal of moderate length. The fourth spiral cord becomes tuberculated on the base which bears two additional weakly tubercled cords. Protoconch apparently paucispiral of two whorls but too worn to observe the sculpture. Shell yellowish.

Figures

Figure 81. Triphoris bathyraphe E. A. Smith, 1890, Saint Helena. A-F, H-K Syntype NHMUK 1889.10.1.1413: front (A, B), side (C, D), back (E), protoconch (F, H), aperture (I), peristome (J, K). G Original figure. L Original label. Scale bars: A-E: 1 mm; F, H: 0.2 mm; I-K: 0.5 mm.