Viriola abbotti ( Baker, Spicer, 1935 )

Viriola abbotti ( Baker, Spicer, 1935) View in CoL

( Figs 2 A–C View FIG ; 3 View FIG ; Table 1)

Triphora abbotti Baker, Spicer, 1935: 39 View in CoL , pl. 5, fig. 4. Viriola abbotti View in CoL – Poppe, 2008: 109, pl. 310, fig. 2; Dan, 2020:

20, fig 21.

Type locality. Ofu Island , Samoan Islands. Type material. Holotype : TheNAT 23763, Paratype: BPBM 196191 About BPBM .

Other material. South China Sea ( East Sea ), Spratly Islands ( Truong Sa Islands ), Khanh Hoa Province, Vietnam: Lansdowne Reef ( Len Dao Island ), on dead corals and un- der stones, 09°46’37’’N, 114°22’34.8’’E, depth 10 m, coll. Tai-Tu N., 19.5.2019, VRTCM.Ga 27051619.01 (3 shells); Pearson Reef ( Phan Vinh Island ), on dead corals and under stones, 08°57’24.1’’N, 113°41’31.2’’E, depth 18–21 m, coll. Tai-Tu N., 23.5.2019, VRTCM.Ga 27050619.01 (4 shells); Barque Canada Reef ( Thuyen Chai Island ), 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 27051019.01 (2 shells); on dead corals and under stones, 08°16’54.4’’N, 113°21’51.8’’E, depth 8–9 m, coll. Tai-Tu N., 30.10.2020, VRTCM.Ga 27051020.01 (5 shells); Alison Reef ( Toc Tan Island ), on dead corals and under stones, 08°49’7.04’’N, 113°57’6.73’’E, depth 2 m, coll. Tai-Tu N., 25.5.2019, VRTCM.Ga 27050719.01 (3 shells); Namyit Island ( Nam Yet 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 27051920.01 (4 shells) GoogleMaps .

Diagnosis. The shell is rather long, cyrtoconoid, with flat profile of upper whorls and convex of lower ones. First few teleoconch whorls white, subsequent whorls smoky gray to yellowish brown; protoconch yellowish brown. Protoconch of 6 whorls, first whorl has hemispherical granules, whorls 2–4 have 1 median spiral thread, whorls 5–6 have 2 median spiral threads, uninterrupted by axial riblets on protoconch whorls. Teleoconch of up to 13 whorls with three smooth spiral cords. The first and third spiral cords are granulated on the upper 4 teleoconch whorls. The second spiral cord is smooth and appears on the seventh teleoconch whorl. Spiral microsculpture of fine threads between the main spiral cords. Base with two additional weakly tuberculed spiral cords and one spiral cord with microsculpture of fine threads. Peristome with an additional rather smooth spiral cord ( Fig. 3D View FIG , Sp1). Outer lip rather thick and flared. Anterior siphonal canal oblique, subtubular, rather long ( Figs 2 View FIG , 3 View FIG ).

Dimensions. SH: 4.3–6.9 mm; SW: 1.4–2.1 mm.

Distribution. In Vietnam, known from Lansdowne Reef, Pearson Reef, Barque Canada Reef, Alison Reef, Namyit Island of the Spratly Islands. Elsewhere: Samoan Islands, Philippines, Hawaii, Polynesia Islands, Kiribati, Gulf of Aqaba, Taiwan, Marshall Islands, Christmas Island [ Baker, Spicer, 1935; Poppe, 2008; Dan, 2020; Bakker, Albano, 2022; Albano et al., 2023].

Remarks. Viriola abbotti differs from V. incisa in its smoky gray to yellowish brown shell ( vs. purplish red shell); spiral microsculpture of fine threads between the main spiral cords ( vs. smooth). V. abbotti differs from V. cancellata in having spiral microsculpture of fine threads between the main spiral cords ( vs. spiral microsculpture of fine threads and weakly axial riblets); First few teleoconch whorls white, subsequent whorls smoky gray to yellowish brown ( vs. The shell yellowish brown with white blotches on the first spiral cord, white granules on the second spiral cord, and reddish brown between spiral cords 1–3).