identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
B75387965F44BF39FEF2FB42FD19F95D.text	B75387965F44BF39FEF2FB42FD19F95D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coelostoma	<div><p>Coelostoma Brullé, 1835</p> <p>Diagnosis. The genus can be distinguished from other hydrophilid genera occurring in Taiwan by the following combination of characters: body rather convex, brown to black (Fig. 1); eyes of moderate size, deeply excised internally; antenna with 9 antennomeres, antennal club loosely segmented; mesoventrite with arrow-head shaped median elevation; metaventrite longer than mesoventral elevation, with strongly raised median portion broadly projecting anteriorly and abutted to mesoventral process; elytra lacking serial punctures; sutural stria reaching basal half of elytra.</p> <p>Bionomics. All species inhabit moist environments, typically being found on gravely, sandy or muddy shores of rivers and pools. Some species live directly in shallow vegetated standing water (FIKÁČEK et al. 2019) and others are found on seepages and wet rocks with algae (JIA et al. 2014).</p></div> 	http://treatment.plazi.org/id/B75387965F44BF39FEF2FB42FD19F95D	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	Liu, Hsing-Che;Hu, Fang-Shuo;Fikáček, Martin	Liu, Hsing-Che, Hu, Fang-Shuo, Fikáček, Martin (2020): Review of the genus Coelostoma of Taiwan with description of a new species (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae 60 (1): 155-162, DOI: 10.37520/aemnp.2020.008
B75387965F46BF3BFC56FF43FBF3FAED.text	B75387965F46BF3BFC56FF43FBF3FAED.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coelostoma (Coelostoma) fallaciosum Orchymont 1936	<div><p>Coelostoma (Coelostoma) fallaciosum Orchymont, 1936</p> <p>(Figs 2A, 2H, 3D)</p> <p>Coelostoma fallaciosum Orchymont, 1936: 19.</p> <p>Coelostoma fallacosum [sic!]: JIA (2005b): 148 (recorded from Taiwan</p> <p>without specified locality).</p> <p>Material examined. TAIWAN: TAITUNG: 1 (TARI): Lanyu (ÊṈ), 5.iv.2011, Y.-T. Wang leg. HSINCHU:7 spec. (HCLC): Beipu Township [ẍẘǿ], 24.707676°N121.060744°E, 140 m, 1.vi.2018, Hsing-Che Liu leg.; 2 (HCLC): same locality, 9.ix.2019, Hsing-Che Liu leg. CHANGHUA: 4 (NMNS, HCLC): Huatan Township (Kñǿ), 24.030731°N120.545094°E, 60 m, 3.xii.2018, Hsing-Che Liu leg. TAINAN: 3 (HCLC): Guantian District [ĎOEdz], 23.182170°N120.307721°E, 19.i.2019, Hsing-Che Liu leg. PINGTUNG: 3 (CNUT): Nanjenshan (ĦḺƜ), 1.xii.2018, Kai-Ying Zheng leg.</p> <p>Diagnosis. Body length 4.8–5.2 mm, maximum body width 3.0– 3.2 mm. Body oval, strongly convex, dorsal surface black to dark brown. Elytra surface densely punctate, without traces of series, sutural stria reaching basal half of elytra. Labrum black with yellow edges, its front margin deeply emarginate (Fig. 2H). Mesofemora without dense pubescence.</p> <p>Male genitalia (Fig. 2A): Median lobe bottle-shaped, narrowly rounded apically, strongly widened close to the base, gonopore situated subapically; parameres bent inwards in apical third, but not truncate apically.</p> <p>Differential diagnosis. Coelostoma fallaciosum is similar to C. vividum Orchymont, 1936 and C. vitalisi in genitalia morphology; it can be differentiated easily by the median lobe which is bottle-shaped and has the gonopore situated subapically.</p> <p>Distribution. This species is known from China (Fujian, Guangdong, Hong Kong), Indonesia, Malaysia, Nepal, Taiwan (Fig. 4) and Vietnam (ORCHYMONT 1936; HANSEN 1999; JIA 2005a; JIA et al. 2014, 2017; this paper).</p> <p>Bionomics. All examined specimens were collected from the surface of soil around a pond, perched on rotting aquatic plants (Fig. 3D).</p></div> 	http://treatment.plazi.org/id/B75387965F46BF3BFC56FF43FBF3FAED	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	Liu, Hsing-Che;Hu, Fang-Shuo;Fikáček, Martin	Liu, Hsing-Che, Hu, Fang-Shuo, Fikáček, Martin (2020): Review of the genus Coelostoma of Taiwan with description of a new species (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae 60 (1): 155-162, DOI: 10.37520/aemnp.2020.008
B75387965F46BF3BFF11FEF2FE5FF7A7.text	B75387965F46BF3BFF11FEF2FE5FF7A7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coelostoma (Holocoelostoma) bhutanicum Jayaswal 1972	<div><p>Coelostoma (Holocoelostoma) bhutanicum Jayaswal, 1972</p> <p>(Figs 2E, 3C)</p> <p>Coelostoma (Holocoelostoma) bhutanicum Jayaswal, 1972: 409.</p> <p>Material examined. TAIWAN: TAIPEI: 1 (TARI):Taihokn,Ankeng [% AE], 2.xi.1941, S.Miyamoto leg.; 1 (TARI):Taihokn, 2.iv.1940, S. Miyamoto leg. PENGHU: 1, 1 ♀♀ (NMNS):Makung [Ṛċ], 19.vi.2000, C.-S. Lin &amp; W.-T.Yang leg. TAICHUNG: 1 (HCLC):Wufeng District [Ẕḇdz], Tonglin Vill. [ṖIJm], 24.0768°N120.7252°E, 110 m, 19.x.2018, Hsing- Che Liu leg, at the edge of a stream,beneath a stone; 3 (HCLC):Wufeng District [Ẕḇdz], Tonglin Vill.[ṖIJm], 24.0768°N120.7252°E, 110 m, 29.x.2018, Hsing-Che Liu leg, at the edge of a stream, beneath a stone; 1</p> <p>(HCLC):Wufeng District [Ẕḇdz], Tonglin Vill. [ṖIJm], 24.0768°N120.7252°E, 110 m, 5.xi.2018, Hsing-Che Liu leg, at the edge of a stream, beneath a stone. TAITUNG: 1 1 ♀ (NMNS): Lanyu Yurean [ÊṈĕƛ], III/6/2012, Y. T. Wang (ŦṪŽ). CHANGHUA:3 spec. (HCLC): Fuxing Township [ĞḄǿ], Fubao Village [Ğã], 24.046974°N120.398450°E, 3 m, 24.xi.2019, Hsing-Che Liu leg. KAOHSIUNG:19 spec. (NCHU): Dongsha Island (ǥàƀ), 20.708°N, 116.71654°E, 21–25.iv.2005, pitfall trap, leg. J.-F. Tsai, Z.-Y. Liu &amp; B.-F. Chen (DE03) [specimens NCHU 0007-1823 to NCHU 0007-1831]; 2 spec. (NCHU): Dongsha Island (ǥàƀ), 20.708°N, 116.71654°E, 21–25.iv.2005, pitfall trap, leg. J.-F. Tsai, Z.-Y. Liu &amp; B.-F. Chen (DE02) [specimens NCHU 0007-1832 and NCHU 0007-1833]; 5 spec. (NCHU):Dongsha Island (ǥàƀ), 20.708°N, 116.716540°E, 26.iv.2005, DE sample plot, leg. J.-F. Tsai, Z.-Y. Liu &amp; B.-F. Chen, [specimens NCHU 0007-1834 to NCHU 0007-1838]; 7 spec. (NCHU):Dongsha Island (ǥàƀ), 20.708°N, 116.716540°E, 26.iv.2005, DE sample plot, marsh, leg. J.-F. Tsai, Z.-Y. Liu &amp; B.-F. Chen [specimens NCHU 0007-1839 to NCHU 0007-1845].</p> <p>Diagnosis. Body size 4.1–4.5 mm, body width 2.7–2.9 mm. Body oval. Labrum black with yellow edges, its front margin emarginate. Elytral surface densely punctate, without traces of series, sutural stria reaching basal half of elytra. Mesofemora with strong setae, but without dense pubescence. Abdominal ventrite V with row of stout setae situated in apical emargination.</p> <p>Male genitalia (Fig. 2E): aedeagus 1.0– 1.1 mm long. median lobe shorter than parameres, almost of the same width from base to apex, only slightly widened at the very base, apex subangulate; gonopore small, situated apically; parameres bent inwards in apical third, truncate apically. Differential diagnosis. This species is very similar to C. stultum, it can be distinguished from it by median lobe almost parallel-sided and slightly spoon-like, not distinctly widened basally.</p> <p>Comments. It seems that this species was confused with C. stultum by previous authors. The concept of C. bhutanicum and C. stultum adopted here is based on the study of material from the Indian subcontinent (including the types of C. stultum from Sri Lanka) prepared as part of a study of the Indian Coelostoma by S. Sheth, H. Ghate and M. Fikáček and will be explained and justified in detail there.</p> <p>Bionomics. Specimens from Changhua and Taichung were collected among plant roots around a pond and in the mud on the river shore.All specimens from Donsha Island (Fig. 3A) were collected by a pitfall trap which was set near a seasonal marsh.</p> <p>Distribution. This species is so far only known from the Himalayas (India, Nepal and Bhutan) (FIKÁČEK et al. 2015). First record for Taiwan (Fig. 4).</p></div> 	http://treatment.plazi.org/id/B75387965F46BF3BFF11FEF2FE5FF7A7	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	Liu, Hsing-Che;Hu, Fang-Shuo;Fikáček, Martin	Liu, Hsing-Che, Hu, Fang-Shuo, Fikáček, Martin (2020): Review of the genus Coelostoma of Taiwan with description of a new species (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae 60 (1): 155-162, DOI: 10.37520/aemnp.2020.008
B75387965F46BF3CFCB5FA7BFDCBF7A3.text	B75387965F46BF3CFCB5FA7BFDCBF7A3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coelostoma (Lachnocoelostoma) phallicum Orchymont 1940	<div><p>Coelostoma (Lachnocoelostoma) phallicum Orchymont, 1940</p> <p>(Figs 2C, 3E)</p> <p>Coelostoma phallicum Orchymont, 1940: 158.</p> <p>Material examined. TAIWAN: TAITUNG: 1 (TARI): Hsiaotianchi (ṬXṮ), 2.iv.2016, B.-X. Guo leg. YILAN: 2 (KMNH): ‘Yijie (áỡ)ʼ [incorrect spelling, correct name of the locality is Aijie (Ṟỡ)], Yunshan Township [DƜǿ], 12–14.ix.2000, Takashi Shimada leg.; 2, 6 ♀♀ (NMNS): Jiaoxi Township [ḌṰǿ], Tangwei Brook Park [ȁā ặảợċă], 24°49'41.9"N121°46'12.4"E, 22.iv.2018, F. S. Hu leg., hand collecting; 5 (HCLC): Jiaoxi Township [ḌṰǿ], 24.824385°N121.769800°E, 2.vii.2019, Hsing-Che Liu leg; 26 spec. (HCLC): Luodong sports park (ůǥḋḙċă), Luodong To. [ůǥḃ], 24.6841°N, 121.7517°E, 19.i.2020, leg. F. S. Hu (near pond). HSINCHU: 1 (HCLC): Emei Township [ŔḎǿ], 11.ix.2018,Hsing-Che Liu leg; TAIPEI: 1, 1 ♀♀ (NMNS): NTU Farm [ȒŘRḤōö], 22.ix.2011, Y. T. Wang (ŦṪŽ).</p> <p>Diagnosis. Body length 5.2–5.5 mm, maximum body width 3.2–3.3 mm. Body black. Labrum yellowish. Maxillary and labial palpi yellowish. Elytra densely punctate, without traces of series, sutural stria reaching basal half of elytra. Ventral face of pro- and mesofemora densely pubescent.</p> <p>Male genitalia (Fig. 2C). Aedeagus 1.5 mm long, apical part of the median lobe trilobed apically, much shorter than parameres; gonopore semicircular; apical third of the paramere bends inwards.</p> <p>Differential diagnosis. Coelostoma phallicum is unique among Taiwanese Coelostoma in having the median lobe trilobed apically.</p> <p>Bionomics (Fig. 3E). The specimens of C. phallicum from Yilan were found in mud with abundant Brassica plants and from accumulations of rotten leaves in a small, artificial brook draining the water from a hot spring hotel. They were found either submerged in water or on the border of the shore zone of the stream. The specimen from Hsinchu was collected from the surface of a wet stone near the stream. The beetles were observed active at night. Distribution. This species is known from China (Guangdong, Hainan, Guangxi), Cambodia, Indonesia, Malaysia, Laos and Vietnam (ORCHYMONT 1940, HANSEN 1999, JIA et al. 2014). New record for Taiwan (Fig. 4).</p> </div>	http://treatment.plazi.org/id/B75387965F46BF3CFCB5FA7BFDCBF7A3	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	Liu, Hsing-Che;Hu, Fang-Shuo;Fikáček, Martin	Liu, Hsing-Che, Hu, Fang-Shuo, Fikáček, Martin (2020): Review of the genus Coelostoma of Taiwan with description of a new species (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae 60 (1): 155-162, DOI: 10.37520/aemnp.2020.008
B75387965F41BF3DFC21FA1AFB36FA1F.text	B75387965F41BF3DFC21FA1AFB36FA1F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coelostoma stultum (Walker 1858)	<div><p>stultum (Walker, 1858)</p> <p>(Figs 2F, 3A)</p> <p>Hydrobius stultus Walker, 1858: 209.</p> <p>Coelostoma stultum: ORCHYMONT (1928: 56) (recorded from ‘Formosaʼ without specified locality).</p> <p>Coelostoma (Holocoelostoma) stultum: MOUCHAMPS (1958: 3).</p> <p>For complete synonymy see HANSEN (1999).</p> <p>Material examined. TAIWAN: HSINCHU: 1 1 ♀ (HCLC): Zhudong [Űǥḃ], 28.viii.2018, 24.784950°N121.036672°E, 83 m, Hsing-Che Liu leg. JAPAN: YAEYAMA ISL.: 1, 1 spec. (NMPC): Iriomote Is., 28.vi.1981, S. Morita lgt.[this specimen was used to illustrate the genitalia of C. stultum in Fig. 2F].</p> <p>Diagnosis. Body size 5.4–5.7 mm, body width 3.0– 3.2 mm. Body oval. Labrum black with yellow edges, its front margin emarginate. Elytral surface densely punctate, without traces of series, sutural stria reaching basal half of elytra. Mesofemora with strong setae, but without dense pubescence. Abdominal ventrite V with row of stout setae situated in apical emargination.</p> <p>Male genitalia (Fig. 2F): aedeagus 0.8–0.9 mm long. Median lobe shorter than parameres, wide basally, narrowing towards midlength, apical half narrowly parallelsided, rounded apically; gonopore wide, situated apically; parameres bent inwards in apical third, truncate apically. Differential diagnosis. This species differs from other Taiwanese species except C. bhutanicum in the following combination of characters: mesofemora without dense pubescence and the apical portion of abdominal ventrite 5 with a shallow emargination possessing stout setae (i.e. diagnostic characters of Holocoelostoma). It can be distinguished from C. bhutanicum by having the median lobe wide in the basal half and not spoon-like in shape. In contrast to C. bhutanicum, specimens of C. stultum are slightly larger but with a relatively smaller and less sclerotized aedeagus.</p> <p>Bionomics. Both examined specimens from Taiwan were found in rotten rice stems near a rice field (Fig. 3A).</p> <p>Distribution.China (Chongqing, Fujian, Guangxi, Guangdong, Hainan, Jiangxi, Sichuan, Yunnan, Xizang), Andaman Is., India, Indonesia, Japan, Malaysia, Mascarene Is., Myanmar, Nicobar Is., Oman, Philippines, Saudi Arabia (south), South Korea, Sri Lanka, Taiwan, Thailand, United Arab Emirates, Vietnam (JIA et al. 2014, 2017; this paper). Some of these records may actually refer to C. bhutanicum (see above under that species).</p> </div>	http://treatment.plazi.org/id/B75387965F41BF3DFC21FA1AFB36FA1F	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	Liu, Hsing-Che;Hu, Fang-Shuo;Fikáček, Martin	Liu, Hsing-Che, Hu, Fang-Shuo, Fikáček, Martin (2020): Review of the genus Coelostoma of Taiwan with description of a new species (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae 60 (1): 155-162, DOI: 10.37520/aemnp.2020.008
B75387965F43BF3EFCA1FF41FA29FB58.text	B75387965F43BF3EFCA1FF41FA29FB58.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coelostoma	<div><p>Key to Taiwanese species of Coelostoma</p> <p>1 Mesofemora densely pubescent except on apex (Fig. 2E). Labrum yellowish (Fig. 2G). (subgenus Lachnocoelostoma)...................................................................... 2</p> <p>– Mesofemora not densely pubescent, at most with sparse short setae. Labrum black with yellow margins (Fig. 2H).................................................................................... 4</p> <p>2 Apical part of median lobe trilobate (Fig. 2C).................................................. C. phallicum Orchymont, 1940</p> <p>– Apical part of median lobe simple............................... 3</p> <p>3 Parameres widened apically, apex of median lobe rounded (Fig. 2D)......................... C. wui Orchymont, 1940</p> <p>– Parameres not distinctly widened apically, apex of median lobe subtriangular (Fig. 1C)...................................................................................... C. taiwanense sp. nov.</p> <p>4 Abdominal ventrite V feebly emarginate posteromesally, bearing stout setae mesally. Gonopore apical (subgenus Holocoelostoma)....................................................... 5</p> <p>– Posterior margin of abdominal ventrite V entire, not emarginate in the middle, without stout setae. Gonopore subapical (subgenus Coelostoma)........................ 6</p> <p>5 Median lobe of aedeagus almost parallel-sided with broadly rounded apex (Fig. 2E)............................................................................ C. bhutanicum Jayaswal, 1972</p> <p>– Median lobe of aedeagus wide in basal half, narrow in apical half (Fig. 2F)............. C. stultum (Walker, 1858)</p> <p>6 Parameres rounded apically, with tuħ of setae at apex. Median lobe gradually narrowing towards apex (Fig. 2B)..................................... C. vitalisi Orchymont, 1923</p> <p>– Parameres pointed apically, without tuħ of setae at apex. Median lobe wide basally and abruptly narrowed at midlength (Fig. 2A)...................................................................................... C. fallaciosum Orchymont, 1936</p></div> 	http://treatment.plazi.org/id/B75387965F43BF3EFCA1FF41FA29FB58	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	Liu, Hsing-Che;Hu, Fang-Shuo;Fikáček, Martin	Liu, Hsing-Che, Hu, Fang-Shuo, Fikáček, Martin (2020): Review of the genus Coelostoma of Taiwan with description of a new species (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae 60 (1): 155-162, DOI: 10.37520/aemnp.2020.008
B75387965F43BF3EFF2BF948FDC7F7A3.text	B75387965F43BF3EFF2BF948FDC7F7A3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coelostoma (Lachnocoelostoma) vagum Orchymont 1940	<div><p>Coelostoma (Lachnocoelostoma) vagum Orchymont, 1940</p> <p>Comments. Coelostoma vagum was reported from Taiwan (without specified locality) by JIA (2005b), but the respective specimen from the Hokkaido University Museum is lost (A. L. Suzumura, pers. comm. 2019). The aedeagus of the species resembles that of C. taiwanense sp. nov. and it is hence possible that this record in fact refers to that species. We remove this species from the Taiwanese fauna at the moment, until the vouchers or fresh specimens from Taiwan are available.</p> </div>	http://treatment.plazi.org/id/B75387965F43BF3EFF2BF948FDC7F7A3	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	Liu, Hsing-Che;Hu, Fang-Shuo;Fikáček, Martin	Liu, Hsing-Che, Hu, Fang-Shuo, Fikáček, Martin (2020): Review of the genus Coelostoma of Taiwan with description of a new species (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae 60 (1): 155-162, DOI: 10.37520/aemnp.2020.008
B75387965F43BF3EFF3AFDD2FD5DF981.text	B75387965F43BF3EFF3AFDD2FD5DF981.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Coelostoma (Lachnocoelostoma) wui Orchymont 1940	<div><p>Coelostoma (Lachnocoelostoma) wui Orchymont, 1940</p> <p>(Figs 2D, 3B)</p> <p>Coelostoma wui Orchymont, 1940: 160.</p> <p>Material examined. TAIWAN: PINGTUNG: 2 (TARI): v.1933, Y. Miwa leg.; 2 (TARI): Neipu Township (Hẘǿ), 7.v.2014, Y.-T. Chung leg.; 6 spec. (TARI): Wanluan (ḆĤ), 5.xii.2017, Y.-T. Chung leg. HSINCHU: 4 (NMNS, HCLC): Hengshan Township [ḒƜǿ], 24.713662°N121.141443°E, 120 m, 8.iii.2019, Hsing-Che Liu &amp; Ryosuke Matsushima leg.</p> <p>Diagnosis. Body length 5.2–5.8 mm, maximum body width 3.2–3.5 mm. Head black. Labrum yellowish. Maxillary palpi, labial palpi yellowish. Pronotum blackish brown, with broad yellowish lateral margins. Elytra black, densely punctate, without traces of series, sutural stria reaching basal half of elytra. Ventral face of pro- and mesofemora pubescent, except at extreme apex.</p> <p>Male genitalia (Fig. 2D). Aedeagus 1.8 mm long. Median lobe much shorter than parameres, slightly widening from base to apex, apex widely rounded; gonopore subtriangular, situated subapically; parameres widened and parallel-sided in apical third.</p> <p>Differential diagnosis. The aedeagus of this species is very long and hence similar to C. vagum and C. taiwanense sp. nov. Coelostoma wui can be distinguished from both the latter species by having the parameres widened and nearly parallel-sided in their apical third, and by the apex of the median lobe being rounded.</p> <p>Bionomics. The specimens were found under the stones on the border of streams (Fig. 3B).</p> <p>Distribution. This species is known from China (Hubei, Hunan, Jiangxi, Shaanxi, Shandong) and Korea (HANSEN 1999, JIA et al. 2014). New record for Taiwan (Fig. 4).</p></div> 	http://treatment.plazi.org/id/B75387965F43BF3EFF3AFDD2FD5DF981	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	Liu, Hsing-Che;Hu, Fang-Shuo;Fikáček, Martin	Liu, Hsing-Che, Hu, Fang-Shuo, Fikáček, Martin (2020): Review of the genus Coelostoma of Taiwan with description of a new species (Coleoptera: Hydrophilidae). Acta Entomologica Musei Nationalis Pragae 60 (1): 155-162, DOI: 10.37520/aemnp.2020.008
