Viriola intergranosa ( Hervier, 1898 )

Viriola intergranosa ( Hervier, 1898) View in CoL

( Figs 2 K–N View FIG , 6 View FIG ; Table 1)

Triphoris intergranosa Hervier, 1898: 266 . Sinistroseila incisa Oliver, 1915: 523 View in CoL . Viriola intergranosa View in CoL – Brook, 1998: 223; Okutani, 2000:

313, pl. 155, fig. 61; Poppe, 2017: pl. 1555, figs 9–10;

Dumrongrojwattana et al., 2016: 286, fig. 3V.

Type locality. Lifou Island , New Caledonia. Type material. Syntype: MNHN-IM-2000-1314 .

Other material. South China Sea , Spratly Islands, Vietnam: Barque Canada Reet, on dead corals and under stones, 08°16’35.3’’N, 113°21’10.7’’E, depth: 12 m, coll. Tai-Tu N., 29.5.2019, VRTCM.Ga 27051019.03 (2 shells); Namyit Island, on dead corals and under stones, 10°11’03.8’’N, 114°22’05.2’’E, depth: 16–18 m, coll. Tai-Tu N., 11.10.2020, VRTCM.Ga 27051920.03 (1 shell) GoogleMaps .

Diagnosis. The shell is short, cyrtoconoid. First few teleoconch whorls are white, subsequent whorls white with brown streaks; protoconch reddish brown. Protoconch of 6 whorls, first whorl with hemispherical granules, whorls 2–4 have 1 median spiral thread, whorls 5–6 have 2 median spiral threads, uninterrupt- ed axial riblets on protoconch whorls. Teleoconch has 8–9 whorls, with three spiral cords. The first and third spiral cords are smooth, appearing as granulated spiral cords on the first 3 teleoconch whorls. The second spiral cord is granular, developing later on the fifth teleoconch whorl. Spiral microsculpture of strings of granules and axial ribs between the main spiral cords. The last whorl has 22–24 axial ribs. Base with an additional granulated spiral cord and a small, smooth spiral cord. Peristome with an additional tubercled spiral cord. Outer lip rather thin and flared. Anterior siphonal canal oblique, subtubular, rather short ( Figs 2 K–N View FIG , 6 View FIG ).

Dimensions. SH: 3.8–3.9 mm; SW: 1.2–1.3 mm.

Distribution. In Vietnam, known from Barque Canada Reet, Namyit Island of the Spratly Islands. Elsewhere: Christmas Island, Cocos Islands, Polynesia, Japan, Marshall Islands, New Caledonia, Kermadec Islands, Philippines, Taiwan, Thailand [ Bakker, Albano, 2022; Albano et al., 2023].

Remarks. The specimens collected in this study are smaller in size than the syntype (MNHN- IM-2000-1314). Viriola intergranosa is superficially similar to Viriola thochuensis n. sp.