Viriola bayani Jousseaume, 1884

Viriola bayani Jousseaume, 1884 View in CoL

( Figs 2 G–J View FIG ; 4 View FIG ; Table 1)

Viriola bayani Jousseaume, 1884: 238 View in CoL , 267, pl. 4, fig. 20; Poppe, 2008: 109, pl. 310, fig 2; Steger et al., 2018: 249, fig. 3; Angelidis, Polyzoulis, 2018: 6, fig. 6, Albano et al., 2023: 63 View Cited Treatment , fig. 38.

Euthymella bayani ( Jousseaume, 1884) – Severns, 2011: pl. 92, fig. 1.

Triforis bayani ( Jousseaume, 1884) – Tryon, 1887: 189, pl. 39, fig. 56.

Type locality. New Caledonia Island, southwest Pacific Ocean .

Type material. Syntype: MNHN-IM-2000-1388.

Other material. South China Sea, Spratly Islands, Khanh Hoa Province, Vietnam: Southwest Cay Island , on dead corals and under stones, 11°26’11.8”N 114°19’56.3”E, depth: 5–8 m, coll. Tai-Tu N., 6.10.2020, VRTCM.Ga 27051220.01 (1 shell) GoogleMaps .

Diagnosis. The shell is narrowly conical, long with flat sides. Teleoconch brown to reddish brown with white blotches on the main spiral cords. Teleoconch whorls with three smooth spiral cords. The second spiral cord, developing later, presents as a string of granules in the early teleoconch. Prosocline axial ribs between the main spiral cords. The last whorl has 24–26 axial ribs. Base with three additional smooth spiral cords ( Fig. 4C, S View FIG 1-S View FIG 3 View FIG ). Peristome with an additional tuberculed spiral cord ( Fig. 4D View FIG , Sp1). Outer lip thick and flared. Parietal callus thick. Anterior siphonal canal oblique, subtubular, long. Protoconch missing.

Dimensions. SH: 7.8 mm; SW: 2.0 mm (protoconch missing).

Distribution. In Vietnam known from Southwest Cay Island of the Spratly Islands. Elsewhere: New Caledonia, Philippines, Israel, Crete Island, Astypalaia Island, Greece, Turkey, Cyprus, Hawaii, Marshall Islands [ Jousseaume, 1884; Poppe, 2008; Steger et al., 2018; Angelidis, Polyzoulis, 2018; Albano et al., 2021; Bakker, Albano, 2022; Albano et al., 2023].

Remarks. V. bayani differs from V. senafirensis (Sturani, 1903) in its long, narrowly conical shell, with flat sides ( vs. shell short, cyrtoconoid, with convex sides). V. bayani differs from V. corrugata in having a brown shell with white streaks on the spiral cords ( vs. yellowish brown); the last whorl has 24–26 axial ribs ( vs. 34–36 axial ribs).