identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
EF59879A40131C1710E2FE78FC3DFCC2.text	EF59879A40131C1710E2FE78FC3DFCC2.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Viriola abbotti (Baker, Spicer 1935)	<div><p>Viriola abbotti (Baker, Spicer, 1935)</p><p>(Figs 2 A–C; 3; Table 1)</p><p>Triphora abbotti Baker, Spicer, 1935: 39, pl. 5, fig. 4. Viriola abbotti – Poppe, 2008: 109, pl. 310, fig. 2; Dan, 2020:</p><p>20, fig 21.</p><p>Type locality. Ofu Island, Samoan Islands. Type material. Holotype : TheNAT 23763, Paratype: BPBM 196191 .</p><p>Other material. South China Sea (<a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">East Sea</a>), Spratly Islands (<a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Truong Sa Islands</a>), Khanh Hoa Province, Vietnam: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Lansdowne Reef</a> (<a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Len Dao Island</a>), 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 (<a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Phan Vinh Island</a>), 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 (<a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Thuyen Chai Island</a>), 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 (<a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Toc Tan Island</a>), 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); <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Namyit Island</a> (<a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Nam Yet Island</a>), 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) .</p><p>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, Sp1). Outer lip rather thick and flared. Anterior siphonal canal oblique, subtubular, rather long (Figs 2, 3).</p><p>Dimensions. SH: 4.3–6.9 mm; SW: 1.4–2.1 mm.</p><p>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].</p><p>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).</p></div>	https://treatment.plazi.org/id/EF59879A40131C1710E2FE78FC3DFCC2	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Nguyen, Tai-Tu;Hoang, Duong T. T.	Nguyen, Tai-Tu, Hoang, Duong T. T. (2025): Description of new species of the genus Viriola Jousseaume, 1884 (Gastropoda: Triphoridae) from Vietnam. Ruthenica, Russian Malacological Journal 35 (2): 53-64, DOI: 10.35885/ruthenica.2025.35(2).1, URL: https://doi.org/10.35885/ruthenica.2025.35(2).1
EF59879A40131C161375FCCCFB55F87F.text	EF59879A40131C161375FCCCFB55F87F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Viriola bayani Jousseaume 1884	<div><p>Viriola bayani Jousseaume, 1884</p><p>(Figs 2 G–J; 4; Table 1)</p><p>Viriola bayani Jousseaume, 1884: 238, 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, fig. 38.</p><p>Euthymella bayani (Jousseaume, 1884) – Severns, 2011: pl. 92, fig. 1.</p><p>Triforis bayani (Jousseaume, 1884) – Tryon, 1887: 189, pl. 39, fig. 56.</p><p>Type locality. New Caledonia Island, southwest Pacific Ocean .</p><p>Type material. Syntype: MNHN-IM-2000-1388.</p><p>Other material. South China Sea, Spratly Islands, Khanh Hoa Province, Vietnam: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.332306&amp;materialsCitation.latitude=11.436611" title="Search Plazi for locations around (long 114.332306/lat 11.436611)">Southwest Cay Island</a>, 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) .</p><p>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 1-S 3). Peristome with an additional tuberculed spiral cord (Fig. 4D, Sp1). Outer lip thick and flared. Parietal callus thick. Anterior siphonal canal oblique, subtubular, long. Protoconch missing.</p><p>Dimensions. SH: 7.8 mm; SW: 2.0 mm (protoconch missing).</p><p>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].</p><p>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).</p></div>	https://treatment.plazi.org/id/EF59879A40131C161375FCCCFB55F87F	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Nguyen, Tai-Tu;Hoang, Duong T. T.	Nguyen, Tai-Tu, Hoang, Duong T. T. (2025): Description of new species of the genus Viriola Jousseaume, 1884 (Gastropoda: Triphoridae) from Vietnam. Ruthenica, Russian Malacological Journal 35 (2): 53-64, DOI: 10.35885/ruthenica.2025.35(2).1, URL: https://doi.org/10.35885/ruthenica.2025.35(2).1
EF59879A40141C1D1120F905FAC7F87D.text	EF59879A40141C1D1120F905FAC7F87D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Viriola Jousseaume 1884	<div><p>Viriola namyitensis n. sp.</p><p>(Figs 2 D–F, 5; Table 1)</p><p>Zoobank registration: urn:lsid:zoobank.org:act: 0971EF73-B78E-484E-9A37-2FB6710001F8</p><p>Type locality: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Namyit Island</a>, Spratly Islands, Khanh Hoa province, Vietnam, 10°11’03.8’’N, 114°22’05.2’’E, depth 16–18 m.</p><p>Type material. Holotype VNMN M-000.002.348 (shell height 7.4 mm, shell width 2.1 mm, Figs. 2 D–E) . Paratype: VRTCM.Ga 27050719.03 (1 shells), Tai-Tu N. (14 shells), same data as holotype .</p><p>Etymology: This species is named after the type locality, Namyit Island, Spratly Islands, Khanh Hoa province, Vietnam.</p><p>Material examined. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=113.93423&amp;materialsCitation.latitude=8.829945" title="Search Plazi for locations around (long 113.93423/lat 8.829945)">South</a> China Sea, Spratly Islands, Vietnam: Lansdowne Reef, on dead corals and under stones, 09°46’37’’N, 114°22’34.8’’E, depth 10 m, coll. Tai-Tu N, 19.5.2019, VRTCM.Ga 27051619.02 (3 shells); Pearson Reef, 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 27050619.02 (1 shell); Barque Canada Reef, 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 27051019.02 (2 shells); on dead corals and under stones, 08°15’52.2’’N, 113°21’45.5’’E, depth: 6–8 m, coll. Tai-Tu N, 29.10.2020, VRTCM.Ga 27051020.02 (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 27051020.03 (3 shells); Alison Reef, 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 27050719.02 (2 shells); on dead corals and under stones, 08°49’47.8’’N, 113°56’3.2’’E, depth: 3 m, coll. Tai-Tu N, 27.5.2019, VRTCM.Ga 27050719.03 (3 shells) .</p><p>Diagnosis. The shell is rather long, cyrtoconoid, flat above and convex below. The teleoconch is 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. The first whorl of protoconch has numerous hemispherical granules. Teleoconch has 13 whorls, with three spiral cords. The second spiral cord is weakly granular, appearing on the first teleoconch whorl. Spiral microsculpture of fine threads and weakly axial riblets that are present between the main spiral cords. The last whorl has 34–36 axial ribs. Base with two additional weakly tuberculed spiral cords (Fig. 5C, S 1–S 2).</p><p>Description. The shell is rather long, cyrtoconoid, flat above and convex below. The teleoconch is 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; protoconch reddish brown. The protoconch has 6 whorls, the first whorl with hemispherical granules, whorls 2–4 with one median spiral thread, and whorls 5–6 with 2 median spiral threads, uninterrupted axial riblets on protoconch whorls. Teleoconch has 13 whorls, with three spiral cords. First and third spiral cords are smooth, granulated on the first teleoconch whorl.The second spiral cord is weakly granular, appearing on the first teleoconch whorl. Spiral microsculpture of fine threads and weakly axial riblets that are present between the main spiral cords. The last whorl has 34–36 axial ribs. Base with two additional weakly tuberculed spiral cords (Fig. 5C, S 1–S 2). Peristome with an additional tuberculed spiral cord (Fig. 5D,</p><p>Sp1). Outer lip thick and flared. Anterior siphonal canal oblique, subtubular, long.</p><p>Measurements. SH: 7.4–8.4 mm; SW: 2.1–2.5 mm (n = 2).</p><p>Distribution. This species is known from Spratly Islands, Khanh Hoa province, Vietnam.</p><p>Ecology. This species collected under stones and on dead corals.</p><p>Remarks. Viriola namyitensis n. sp. is superficially similar to V. cancellata (Hinds, 1843) . However, V. namyitensis n. sp. differs from V. cancellata in having the shell cyrtoconoid, flat above, convex below, base rather wide (vs. the shell cyrtoconoid with flat sides); the first whorl of protoconch has numerous hemispherical granules (vs. the first two whorls of protoconch have numerous hemispherical granules); the second spiral cord appears on the first teleoconch whorl (vs. the second spiral cord appears on the second teleoconch whorl); spiral microsculpture of fine threads and axial ribs (vs. axial ribs); the last whorl has 34–36 axial ribs (vs. 28–30 axial ribs); the base with two additional weakly tuberculed spiral cords (vs. the base with an additional granulated spiral cord and a small, smooth spiral cord).</p></div>	https://treatment.plazi.org/id/EF59879A40141C1D1120F905FAC7F87D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Nguyen, Tai-Tu;Hoang, Duong T. T.	Nguyen, Tai-Tu, Hoang, Duong T. T. (2025): Description of new species of the genus Viriola Jousseaume, 1884 (Gastropoda: Triphoridae) from Vietnam. Ruthenica, Russian Malacological Journal 35 (2): 53-64, DOI: 10.35885/ruthenica.2025.35(2).1, URL: https://doi.org/10.35885/ruthenica.2025.35(2).1
EF59879A40181C1C10DDFF26FDEBF9F0.text	EF59879A40181C1C10DDFF26FDEBF9F0.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Viriola intergranosa (Hervier 1898)	<div><p>Viriola intergranosa (Hervier, 1898)</p><p>(Figs 2 K–N, 6; Table 1)</p><p>Triphoris intergranosa Hervier, 1898: 266 . Sinistroseila incisa Oliver, 1915: 523 . Viriola intergranosa – Brook, 1998: 223; Okutani, 2000:</p><p>313, pl. 155, fig. 61; Poppe, 2017: pl. 1555, figs 9–10;</p><p>Dumrongrojwattana et al., 2016: 286, fig. 3V.</p><p>Type locality. Lifou Island, New Caledonia. Type material. Syntype: MNHN-IM-2000-1314 .</p><p>Other material. <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">South</a> China <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Sea</a>, Spratly Islands, Vietnam: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=114.36811&amp;materialsCitation.latitude=10.184389" title="Search Plazi for locations around (long 114.36811/lat 10.184389)">Barque</a> 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) .</p><p>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, 6).</p><p>Dimensions. SH: 3.8–3.9 mm; SW: 1.2–1.3 mm.</p><p>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].</p><p>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.</p></div>	https://treatment.plazi.org/id/EF59879A40181C1C10DDFF26FDEBF9F0	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Nguyen, Tai-Tu;Hoang, Duong T. T.	Nguyen, Tai-Tu, Hoang, Duong T. T. (2025): Description of new species of the genus Viriola Jousseaume, 1884 (Gastropoda: Triphoridae) from Vietnam. Ruthenica, Russian Malacological Journal 35 (2): 53-64, DOI: 10.35885/ruthenica.2025.35(2).1, URL: https://doi.org/10.35885/ruthenica.2025.35(2).1
EF59879A40181C1F1121F90DFB18F925.text	EF59879A40181C1F1121F90DFB18F925.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Viriola Jousseaume 1884	<div><p>Viriola thochuensis n. sp.</p><p>(Figs 2 O–U, 7; Table 1)</p><p>Zoobank registration: urn:lsid:zoobank.org:act: 591BB4BE-3E3A-4E36-8C2D-AF6B93055085</p><p>Type material. Holotype VNMN M-000.002.349 (shell height 6.2 mm, shell width 2.2 mm, Figs. 2 S–T) . Paratypes: VRTCM.Ga 27051019.04 (4 shells), Tai-Tu N. (10 shells), same data as holotype .</p><p>Type locality: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.48778&amp;materialsCitation.latitude=9.279278" title="Search Plazi for locations around (long 103.48778/lat 9.279278)">Hon Xanh Island</a>, Tho Chu Islands, Kien Giang province, Vietnam, 09°16’45.4’’N, 103°29’16.0’’E, depth 12 m.</p><p>Etymology: This species is named after the type locality, where the type species was found Tho Chu Islands, Kien Giang province, Vietnam.</p><p>Material examined. South China Sea, Spratly Islands, Khanh Hoa Province, Vietnam: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.48778&amp;materialsCitation.latitude=9.279278" title="Search Plazi for locations around (long 103.48778/lat 9.279278)">Barque</a> Canada <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.48778&amp;materialsCitation.latitude=9.279278" title="Search Plazi for locations around (long 103.48778/lat 9.279278)">Reet</a>, 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 27051019.04 (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 27051019.05 (3 shells); <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.48778&amp;materialsCitation.latitude=9.279278" title="Search Plazi for locations around (long 103.48778/lat 9.279278)">Namyit Island</a>, 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 27051920.04 (2 shells); <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.48778&amp;materialsCitation.latitude=9.279278" title="Search Plazi for locations around (long 103.48778/lat 9.279278)">Tho Chu Islands</a>, Kien Giang Province, Vietnam: <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.48778&amp;materialsCitation.latitude=9.279278" title="Search Plazi for locations around (long 103.48778/lat 9.279278)">Hon Xanh Island</a>, on dead corals and under stones, 09°16’45.4’’N, 103°29’16.0’’E, depth: 12 m, coll. Tai-Tu N., 13.6.2023, VRTCM.Ga 38080923.02 (7 shells) .</p><p>Diagnosis. The shell is short, conoid, rather flat sides, base wide. Protoconch has 5–5½ 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 2 teleoconch whorls. The second spiral cord is granular, developing later on the second teleoconch whorl. Spiral microsculpture of fine threads and axial ribs between the main spiral cords. The last whorl has 26–28 axial ribs. The shell has a white background with patches of brown to dark brown. The third spiral cord on the teleconch whorls is more brightly colored than the first and second spiral cords.</p><p>Description. The shell is short, conoid, rather flat sides, base wide. The shell has a white background with patches of brown to dark brown. The third spiral cord on the teleconch whorls is more brightly colored than the first and second spiral cords. Protoconch is reddish brown, with 5–5½ whorls. First protoconch whorl has hemispherical granules; protoconch whorls 2–3 have one median spiral thread, protoconch whorls 4–5½ have 2 median spiral threads; uninterrupted axial riblets on protoconch whorls. Teleoconch has 8–9 whorls, with three spiral cords. The first and third spiral cords are smooth, granulated on the first 2 teleoconch whorls. The second spiral cord is granular, developing later on the second teleoconch whorl. Spiral microsculpture of fine threads and axial ribs between the main spiral cords. The last whorl has 26–28 axial ribs. Base with an additional granulated spiral cord (Fig. 7C, S 1) and a small, smooth spiral cord (Fig. 7C, S 2). Peristome with an additional tuberculed spiral cord (Fig. 7D, Sp1). Aperture sub- quadrate. Outer lip rather thick and flared. Anterior siphonal canal oblique, subtubular, rather short.</p><p>Measurements. Shell height 3.6–6.3, shell width 1.1–2.2 (n = 14).</p><p>Distribution. This species is known from Tho Chu islands and Spratly Islands islands.</p><p>Ecology. This species collected under stones and on dead corals.</p><p>Remarks. Viriola thochuensis n. sp. is superficially similar to V. intergranosa . However, V. thochuensis n. sp. differs from V. intergranosa in having the shell short, conoid, with rather flat sides, base rather wide (vs. the shell short, cyrtoconoid); protoconch with 5–5½ whorls (vs. 6 whorls); the first and third spiral cords appeared as granulated spiral cords on the first 2 teleoconch whorls (vs. appeared as granulated spiral cords on the first 3 teleoconch whorls); the second spiral cord appears on the second teleoconch whorl (vs. appears on the fifth teleoconch whorl); spiral microsculpture of fine threads and axial ribs (vs. strings of granules and axial ribs); the last whorl has 26–28 axial ribs (vs. 22–24 axial ribs); outer lip rather thick (vs. rather thin).</p></div>	https://treatment.plazi.org/id/EF59879A40181C1F1121F90DFB18F925	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Nguyen, Tai-Tu;Hoang, Duong T. T.	Nguyen, Tai-Tu, Hoang, Duong T. T. (2025): Description of new species of the genus Viriola Jousseaume, 1884 (Gastropoda: Triphoridae) from Vietnam. Ruthenica, Russian Malacological Journal 35 (2): 53-64, DOI: 10.35885/ruthenica.2025.35(2).1, URL: https://doi.org/10.35885/ruthenica.2025.35(2).1
