identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
038F87B9FFA2FFC377AFFCB5FA5120DD.text	038F87B9FFA2FFC377AFFCB5FA5120DD.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion Dahlbom 1843	<div><p>Genus Chalybion Dahlbom, 1843: 21</p><p>Type species: “ Chalybion caeruleum ”</p><p>[= Sphex caeruleus of Linnaeus, 1767: 941 = Sphex caeruleus Linnaeus, 1763 (nec Sphex caeruleus Linnaeus, 1758) = Sphex cyaneus Fabricius, 1775 (nec Sphex cyaneus Linnaeus, 1758) = Pelopeus (sic) californicus de Saussure, 1867], designated by Patton, 1880: 378.</p><p>Chalybium Agassiz, 1846: 77 . Emendation of Chalybion Dahlbom, 1843 .</p><p>Chalybium W. Schulz, 1906: 192 . Emendation of Chalybion Dahlbom, 1843, junior homonym of Chalybium Agassiz, 1846 .</p><p>Hemichalybion Kohl, 1918: 79 . Type species: Pelopoeus eckloni Dahlbom, 1845, designated by Pate, 1937: 30.</p><p>Key to the Vietnamese species of Chalybion</p><p>Females</p><p>1. Anterior margin of clypeus with broadly projecting median lobe; antenna ferruginous; petiole wholly yellow; legs partly yellow; metasoma black; pubescence of head and mesosoma black (subgenus Hemichalybion)........ C. sumatranum (Kohl, 1884)</p><p>- Anterior margin of clypeus with three or five teeth medially; antenna black and blue or green; metasoma, petiole and legs wholly blue or green, pubescence of head and mesosoma white (subgenus Chalybion)............................... 2</p><p>2. Lower metapleuron with conspicuous carina above midcoxa; area between antennal sockets with transverse carina; tarsi with plantulae............................................................................................ 3</p><p>- Lower metapleuron without conspicuous carina above midcoxa; area between antennal sockets without transverse carina; tarsi without plantulae..................................................................................... 5</p><p>3. Mesosoma less than three times as long as high; petiole longer than hind basitarsus; forewing hyaline.................................................................................................... C. gracile Hensen, 1988</p><p>- Mesosoma elongate, more than three times as long as high; petiole shorter than hind basitarsus; forewing light brown...... 4</p><p>4. Clypeus with longitudinal carina (Fig. 7); inner eye margin conspicuously curved dorsally (Fig. 7); vertex behind posterior ocelli conspicuously sloping (Fig. 8); occipital carina lowered far from apical area (Fig. 8); sterna III and IV largely covered with dense, brown micro-pubescence (Fig. 10); apical edge of fourth sternum not depressed (Fig. 10); terminal metasomal sternum somewhat curved apically (Fig. 10); body dark blue (Fig. 11); head and mesosoma not iridescent (Figs 7–9)................................................................................... C. dolichothorax (Kohl, 1918)</p><p>- Clypeus without longitudinal carina (Fig. 18); inner eye margin conspicuously curved at middle (Fig. 18); vertex behind posterior ocelli moderately sloping (Figs 19, 20); occipital carina highly raised near apical area (Figs 19, 20); sterna III and IV not covered with brown micro-pubescence (Fig. 23); apical edge of fourth metasomal sternum conspicuously depressed (Fig. 23); terminal metasomal sternum widely flat apically (Fig. 23); body dark green (Fig. 24); head and mesosoma iridescent (Figs 18–21)................................................................... C. iridescens Pham &amp; Ohl, sp. nov.</p><p>5. Metasomal sternum VI flat and wide, broadly truncate at apex.................................................. 6</p><p>- Metasomal sternum VI not markedly wide, rounded at apex.................................................... 7</p><p>6. Both forewing and hindwing brown distally, hyaline proximally; petiole moderately curved...... C. malignum (Kohl, 1906)</p><p>- Both forewing and hindwing light brown; petiole markedly curved.................... C. tanvinhense Pham &amp; Ohl, 2019</p><p>7. Propodeum without tomentum anterolaterally; petiole markedly curved................... C. japonicum (Gribodo, 1882)</p><p>- Propodeum with tomentum anterolaterally; petiole moderately curved................... C. bengalense (Dahlbom, 1845)</p><p>Males</p><p>Males of C. sumatranum, C. dolichothorax, C. iridescens sp. nov., and C. gracile are unknown and not included.</p><p>1. Anterior margin of clypeus without teeth; flagellomeres VIII and IX with placoids; petiole markedly curved....................................................................................... C. tanvinhense Pham &amp; Ohl, 2019</p><p>- Anterior margin of clypeus with five teeth; placoids varied; petiole moderately to markedly curved.................... 2</p><p>2. Anterior margin of clypeus with five rather small teeth; both forewing and hindwing brown distally, hyaline proximally.................................................................................... C. malignum (Kohl, 1906)</p><p>- Anterior margin of clypeus with five broad teeth; wings uniformly coloured....................................... 3</p><p>3. Flagellomeres VII or VIII to IX with placoids; propodeum without tomentum anterolaterally; petiole conspicuously curved.............................................................................. C. japonicum (Gribodo, 1882)</p><p>- Flagellomeres V or VI to IX with placoids; propodeum with tomentum anterolaterally; petiole moderately curved..................................................................................... C. bengalense (Dahlbom, 1845)</p></div>	https://treatment.plazi.org/id/038F87B9FFA2FFC377AFFCB5FA5120DD	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFA1FFC277AFFCDEFAAE22E5.text	038F87B9FFA1FFC277AFFCDEFAAE22E5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion bengalense (Dahlbom 1845)	<div><p>Chalybion bengalense (Dahlbom, 1845)</p><p>(Figs 1–6)</p><p>Material examined. VIETNAM. Son La: 21 ♀♀, 16 ♂♂; Son La city, Phu Yen, Van Ho, Thuan Chau, and Sop Cop districts; the material was collected between 2017 and 2023 . Hoa Binh: 16 ♀♀, 24 ♂♂, Yen Thuy, Mai Chau, Luong Son, Kim Boi, and Da Bac districts; the material was collected between 2001 and 2024. Lao Cai : 2 ♂♂, about 30 km east of Lao Cai city, near Hanoi-Lao Cai highway, 21.ix.2017 . Yen Bai: 2 ♂♂, Yen Bai city, 14.ii.2015, emerged from a nest; 4 ♀♀, 3 ♂♂, Sa Pa town, 19–21.ix.2017 . Ha Noi: 55 ♀♀, 55 ♂♂; Bac Tu Liem, Long Bien, Nam Tu Liem, Cau Giay, Gia Lam, Thach That, Chuong My, Ba Vi, and Soc Son districts; the material was collected between 2001 and 2024 . Hung Yen: 3 ♀♀, 5 ♂♂, Hai Trieu, Tien Lu, 25.vi.2013 . Soc Trang: 1 ♀, 1 ♂, My Tu, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=105.75381&amp;materialsCitation.latitude=9.572945" title="Search Plazi for locations around (long 105.75381/lat 9.572945)">My Phuoc</a>, 09°34'22.6"N, 105°45'13.7"E, 8.v.2018, insect net . Quang Ngai: 1 ♀, 1 ♂, An Binh, Ly Son, 8.viii.2017, insect net; 1 ♀, An Hai, Ly Son, 7.viii.2017, insect net . Ninh Binh: 18 ♀♀, 23 ♂♂; Ninh Binh city, Gia Vien and Nho Quan districts; the material was collected between 2017 and 2024 ; 12 ♀♀, 6 ♂♂, Cuc Phuong National Park, 30.iv.2019 (VIE3) , 29.iv.2019 (VIE1), 06.v.2019 (VIE4) . Thai Binh: 27 ♀♀, 82 ♂♂; Hung Ha and Tien Hai districts, Thai Binh city; the material was collected between 2016 and 2022 . Thai Nguyen: 2 ♂♂, Phu Luong, 15.vii.2017; 2 ♀♀, Phu Thuong, Vo Nhai, 5.iii.2017, nest . Thanh Hoa: 4 ♀♀, 7 ♂♂; Sam Son, Hoang Hoa, and Thach Thanh districts; the material was collected between 2016 and 2022 . Vinh Phuc: 3 ♀♀, 8 ♂♂, Me Linh Station for Biodiversity, Me Linh, 19.iv.2008, 19.v.2017, 3.vi.2018, Malaise trap . Nam Dinh: 5 ♀♀, 7 ♂♂, Xuan Thuy National Park, Xuan Thuy, 11.v.2016, 22–25.vii.2024 . Dak Lak: 2 ♀♀, 2 ♂♂, Chu Yang Sin National Park, Krang Bang, 2.v.2016 . Kon Tum: 1 ♀, 1 ♂, Sa Thay town, Sa Thay, 3.iv.2014 ; 1 ♂, Chu Mon Ray National Park, Sa Thay, 2.iv.2014 . Nghe An: 6 ♀♀, 10 ♂♂; Cua Lo town, Con Cuong and Nam Dan Districts, the material was collected between 2017 and 2024. Ha Giang: 4 ♀♀, 2♂♂, Phong Quang, Vi Xuyen, 25.v.2022 ; 2 ♀♀, Bat Dai Son, Quan Ba, 17.vi.2023 . Dien Bien: 1 ♂, Pa Thom, Dien Bien city, 2.iii.2023 . Quang Ninh: 3 ♀♀, 7 ♂♂; Tien Yen town, Uong Bi and Ha Long cities; the material was collected between 2013 and 2023 . Phu Tho: 2 ♀♀, 4 ♂♂, Thanh Son town, Thanh Son, Vi.2011 . Tay Ninh: 4 ♀♀, 2 ♂♂, Ninh Son, 28.v.–11.vi.2023, Malaise traps; 3 ♀♀, 3 ♂♂, Duong Minh Chau, 11.vi.–3.vii.2023, Malaise traps . Ha Tinh: 2 ♀♀, 2 ♂♂, Tram Co, Vu Quang National Park, 27.v.2024 ; 1 ♂, Ke Go lake, Cam Le, Cam Xuyen, 2.v.2019 . Hai Duong: 3 ♀♀, 6 ♂♂, Hien Thanh, Kinh Mon, 21.vii.2016, emerged from collected nests . Cao Bang: 4 ♀♀, 1 ♂, Ngoc Dong, Ha Quang, 28.v.2022, 13.vi.2023 ; 1 ♀, Thanh Long, Ha Quang, 29.v.2022 .</p><p>Distribution. Vietnam: Sai Gon, Vung Tau (Dollfuss 2016); Da Nang (Tano &amp; Kurokawa 2015); Bac Ninh, Dak Lak, Ha Noi, Hai Duong, Hoa Binh, Hung Yen, Kon Tum, Lao Cai, Nam Dinh, Nghe An, Ninh Binh, Phu Tho, Quang Ngai, Quang Ninh, Son La, Thai Binh, Thai Nguyen, Thanh Hoa, Vinh Phuc, Yen Bai (Pham 2018; Pham et al. 2019); Cao Bang, Dien Bien, Ha Giang, Ha Tinh, Soc Trang, Tay Ninh (new records). Elsewhere: Australia, Bangladesh, China (including Hong Kong), Egypt, Eritrea, Ethiopia, French Polynesia, Greece, Guam Island, Hawaiian Island, India, Indonesia (Ternate, Misool, Lesser Sunda islands), Iraq, Italy, Japan, Kenya, Kiribati (Gilbert island), Laos, Madagascar (Mascarenes, Seychelles islands), Malaysia, Maldives, Mauritius (Chagos Archipelago), Mozambique, Myanmar, Nepal, New Caledonia, Philippines, Phoenix island, Seychelles islands, Singapore, South Africa, Sri Lanka, Taiwan, Tanzania, Thailand, Timor, United State, Yemen (Socotra island) (Pulawski 2024).</p></div>	https://treatment.plazi.org/id/038F87B9FFA1FFC277AFFCDEFAAE22E5	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFA7FFC577AFFF44FA5B23D7.text	038F87B9FFA7FFC577AFFF44FA5B23D7.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion dolichothorax (Kohl 1918)	<div><p>Chalybion dolichothorax (Kohl, 1918)</p><p>(Figs 7–11)</p><p>Material examined. VIETNAM. Hoa Binh: 1 ♀, Tan Lac, Yen Thuy (area of Cuc Phuong National Park), 10– 25.v.2002 , Malaise trap. Cao Bang: 2 ♀♀, Ban Hau, Cao Thang, Trung Khanh, 22.vi.2023 . Tuyen Quang: 1 ♀, Na Hang, 30.v.2017 . Ninh Binh: 5 ♀♀, Cuc Phuong National Park, 30.iv.2019 (VIE5) ; 5 ♀♀, Cuc Phuong National Park, 6.v.2019 . Dak Lak: 1 ♀, Chu Yang Sin National Park, 2–10.vi.2007 , Malaise Traps.</p><p>Distribution. Vietnam: Tonkin Central, Tuyen-Quan (= currently Tuyen Quang province) (Hensen 1988); Hoa Binh (Pham et al. 2019); Cao Bang, Dak Lak, Ninh Binh (new records). Elsewhere: China, Laos (Pulawski 2024).</p></div>	https://treatment.plazi.org/id/038F87B9FFA7FFC577AFFF44FA5B23D7	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFA7FFC577AFF937FE6925E6.text	038F87B9FFA7FFC577AFF937FE6925E6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion gracile Hensen 1988	<div><p>Chalybion gracile Hensen, 1988</p><p>Material examined. VIETNAM. Son La: 3 ♀♀, Son La city, 1–10.v.2017, 25.ix.–5.x.2017, Malaise trap. Ha Giang: 2 ♀♀, Phong Quang, Vi Xuyen, 25.v.2022 . Lao Cai: 3 ♀♀, Bat Xat, 12.vi.2023 . Tuyen Quang: 3 ♀♀, Na Hang, 30.v.2017, 10.viii.2017, Malaise trap.</p><p>Distribution. Vietnam: Cochichine P. condon (= currently Con Dao island, Ba Ria-Vung Tau Province) (Hensen 1988), Son La (Pham et al. 2019), Ha Giang, Lao Cai, Tuyen Quang (new records). Elsewhere: India, Laos, Sri Lanka (Pulawski 2024).</p></div>	https://treatment.plazi.org/id/038F87B9FFA7FFC577AFF937FE6925E6	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFA5FFC777AFFF44FE7D2645.text	038F87B9FFA5FFC777AFFF44FE7D2645.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion japonicum (Gribodo 1882)	<div><p>Chalybion japonicum (Gribodo, 1882)</p><p>(Figs 12–17)</p><p>Material examined. VIETNAM. Hoa Binh: 2 ♀♀, 2 ♂♂, Yen Thuy, 30.iii.–10.iv.2003, Malaise trap; 1 ♂, Da Phuc, Yen Thuy, 20–30.iv.2003, Malaise trap; 1 ♀, Tan Son, Mai Chau, 10–15.iv.2010, Malaise trap; 3 ♀♀, 10 ♂♂, Tan Vinh, Luong Son, 2.v.2017; 2 ♂♂, Dong Bang, Mai Chau, 18.v.2018, nest. Son La: 2 ♀♀, 2 ♂♂, Chieng Bom, Thuan Chau ( Copia Natural Reserve), 1010 m, 15.v.2017 ; 1 ♀, 2 ♂♂, Son La city, 10–20.v.2017; 2 ♀♀, Son La city, 1–10.viii.2017, Malaise trap. Phu Tho: 4 ♀♀, 3 ♂♂, Kiet Son, Tan Son, 30.iii.2010; 4 ♂♂, Xuan Dai, Tan Son, 15.iii.2010; 2 ♀♀, Tan Son town, 12.iv.2024 , nest; 2 ♀♀, 1 ♂, Thu Cuc, Tan Son, 13.iv.2024, nest. Vinh Phuc: 3 ♀♀, 4 ♂♂, Ngoc Thach, Me Linh, 4.iv.–4.v.2001, Malaise trap; 12 ♀♀, 9 ♂♂, Me Linh Station for Biodiversity, 1– 3.vi.2018, 12.vi.2021 , insect nets, trap nests; 1 ♀, 3 ♂♂, Tam Dao National Park, Tam Dao, 13.vi.2012 . Ha Tinh: 1 ♂, Ke Go lake, Cam Le, Cam Xuyen, 23.iii.2019 ; 6 ♀♀, 3 ♂♂, Vu Quang National Park, Vu Quang, 24–27.v.2024 . Nghe An: 4 ♀♀, 1 ♂, Pu Mat National Park, Con Cuong, 21–23.v.2024 . Lao Cai: 2 ♀♀, 2 ♂♂, Bat Xat, 21.vi.2023 . Ninh Binh: 2 ♀♀, Gia Sinh, Gia Vien, 24.vi.2017, insect net; 2 ♀♀, Cuc Phuong National Park, Nho Quan, 29–31.vii.2024 ; 10 ♀♀, 15 ♂♂, Cuc Phuong National Park, 30.iv.2019 (VIE3) ; 4 ♀♀, Cuc Phuong National Park, 29.iv.2019 (VIE1) ; 1 ♀, Cuc Phuong National Park, 09.v.2019 (VIE13) ; 1 ♀, Cuc Phuong National Park, 06.v.2019 . Ha Noi: 8 ♀♀, 12 ♂♂, Ba Vi National Park, Ba Vi, 28.vi.2016, 10.vii.2016, 30.iv.2017, 6–8.viii.2024 ; 5 ♀♀, 2 ♂♂, Dong Mo, Ba Vi, 17.viii.2024, nests; 2 ♀♀, Van Hoa, Ba Vi, 17.xii.2023, nest. Bac Kan: 2 ♀♀, Deo Gio, Ngan Son, 22.v.2022; 1 ♂, Sy Binh, Bach Thong, 23.viii.2024 . Ha Giang: 5 ♀♀, Phong Quang, Vi Xuyen, 26.v.2022; 2 ♀♀, 2 ♂♂, Phong Quang, Vi Xuyen, 3.vi.2023; 3 ♂♂, Bat Dai Son, Quan Ba, 16–19.vi.2023. Cao Bang: 1 ♀, 1 ♂, Thanh Long, Ha Quang, 12–14.vi.2023; 1 ♂, Ngoc Dong, Ha Quang, 23.v.2022; 1 ♀, Phong Phin, Deo Gio, 12.vi.2023. Thai Nguyen: 8 ♀♀, 5 ♂♂, Pho Yen, 30 viii.2022, trap nests; 1 ♂, Phu Luu, 21.vi.2020. Quang Ninh: 3 ♀♀, 2 ♂♂, Tien Yen town, 22.viii.2023 , insect net, nest.</p><p>Distribution. Vietnam: Tonkin (= northern Vietnam); Ha Noi and Ha Giang (Hensen 1988); Hoa Binh and Son La (Pham et al. 2019); Bac Kan, Cao Bang, Ha Tinh, Lao Cai, Nghe An, Ninh Binh, Phu Tho, Quang Ninh, Thai Nguyen, Vinh Phuc (new records). Elsewhere: China, Japan, Korea, Laos Philippines, Russian Far East, Thailand, Taiwan (Pulawski 2024).</p></div>	https://treatment.plazi.org/id/038F87B9FFA5FFC777AFFF44FE7D2645	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFA5FFC777AFFB78FE9A2469.text	038F87B9FFA5FFC777AFFB78FE9A2469.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion malignum (Kohl 1906)	<div><p>Chalybion malignum (Kohl, 1906)</p><p>Material examined. VIETNAM. Ha Noi: 1 ♀, Ba Vi National Park, Ba Vi, 11.viii.2024 . Hoa Binh: 2 ♀♀, 1 ♂, Tan Lac, Yen Thuy, 5.viii.2017; 11 ♀♀, 9 ♂♂, My Tan, Tan Thanh, Luong Son, 15.v–1.ix.2018, trap nests; 77 ♀♀, 60 ♂♂, Kim Son, Kim Boi, 15–30.vi.2019, 1–15.vii.2019, trap nests. Ninh Binh: 2 ♀♀, Cuc Phuong, Nho Quan, 21.vii.2016 . Son La: 1 ♂, Muong Thai, Ham Yen, 11.viii.2017; 2 ♀♀, Xuan Nha, Van Ho, 19.ix.2023. Thai Nguyen: 48 ♀♀, 26 ♂♂, Yen Lac, Phu Luong, 25.v.–03.vi.2014, 10–25.v.2019, 1–15.vii.2020, 15–30.vi.2020, trap nests. Vinh Phuc: 20 ♀♀; 13 ♂♂, Tam Dao; ii–vii. 2013, iii–viii. 2014; 400 m, trap nests; 16 ♀♀, 9 ♂♂, Me Linh Station for Biodiversity, Me Linh, i–vi.2013, vii.–xii.2014 , trap nests. Ha Giang: 4 ♀♀, 2 ♂♂, Phong Quang, Vi Xuyen, 25.v.2022 .</p><p>Distribution. Vietnam: Hoa Binh, Son La, Thai Nguyen, Vinh Phuc (Pham &amp; Dang 2017; Pham et al. 2019), Ha Giang, Ha Noi, Ninh Binh (new records). Elsewhere: China, India, Indonesia, Malaysia, Myanmar, Sri Lanka (Pulawski 2024).</p></div>	https://treatment.plazi.org/id/038F87B9FFA5FFC777AFFB78FE9A2469	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFA5FFC777AFF914FBFE256D.text	038F87B9FFA5FFC777AFF914FBFE256D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion tanvinhense Pham & Ohl 2019	<div><p>Chalybion tanvinhense Pham &amp; Ohl, 2019</p><p>Material examined. VIETNAM. Hoa Binh: 1 ♀, Tan Vinh, Luong Son, 2.v.2017 . Son La: 2 ♂♂, Chieu Village, Muong Thai, Ham Yen, 11.viii.2017 .</p><p>Distribution. Vietnam: Hoa Binh, Son La (Pham et al. 2019; Pulawski 2024).</p></div>	https://treatment.plazi.org/id/038F87B9FFA5FFC777AFF914FBFE256D	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFA4FFC677AFFF44FE9523CD.text	038F87B9FFA4FFC677AFFF44FE9523CD.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion sumatranum (Kohl 1884)	<div><p>Chalybion sumatranum (Kohl, 1884)</p><p>Material examined. VIETNAM. Thai Binh: 2 ♀♀, Hong Minh, Hung Ha, 24.vi.2013, Regd. No. 00053/P13, Regd. No. 00054/P13. Phu Tho: 1 ♀, Thu Cuc, Thanh Son, 22.vi.2024 .</p><p>Distribution. Vietnam: Tonkin (= currently north Vietnam, specific locality not indicated) (Kohl 1918), Thai Binh (Pham 2016), Phu Tho. Elsewhere: China (Hong Kong), Indonesia, Singapore (Pulawski 2024).</p><p>Remarks. Kohl (1918) recorded this species from Tonkin (= currently north Vietnam), but he did not indicate the specific locality. Phu Tho is a province in north Vietnam. Consequently, C. sumatranum is not newly recorded for this province.</p></div>	https://treatment.plazi.org/id/038F87B9FFA4FFC677AFFF44FE9523CD	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFA4FFC877AFFDF0FC7622C9.text	038F87B9FFA4FFC877AFFDF0FC7622C9.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion iridescens Pham & Ohl & Nguyen & Nguyen 2025	<div><p>Chalybion iridescens Pham &amp; Ohl, sp. nov.</p><p>(Figs 18–24)</p><p>Material examined. Holotype, VIETNAM. Gia Lai: ♀, Kon Chu Rang Natural Reserve, Son Lang, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=108.42333&amp;materialsCitation.latitude=14.713333" title="Search Plazi for locations around (long 108.42333/lat 14.713333)">Kbang</a>, 14°42'48"N, 108°25'24"E, 861 m, 5.v.2018, T. T. Nguyen collector . Paratypes, VIETNAM. Gia Lai: 1 ♀, same data as for holotype .</p><p>Diagnosis.</p><p>Chalybion iridescens sp. nov. is a member of the Chalybion madecassum species-group because of the following combination of characters: Anterior margin of clypeus with three distinct teeth; mandible without inner subapical tooth; supra-antennal plate with transverse carina ventrally; mesosoma about 3.3 × as long as high; metanotal flange small, somewhat produced over propodeum; lower metapleuron with angular carina; tarsi with plantulae; body with white pubescence.</p><p>Both C. dolichothorax and “ C. iridescens ” sp. nov. differ from the other members of the C. madecassum species-group by having the following characters: Mesosoma more than three × as long as high, propodeal dorsum with pair of longitudinal furrows, and occipital carina evanescent ventrally.</p><p>The new species is similar to C. dolichothorax, but the differences between them are listed in the key above and in the revised key to the species of the C. madecassum group below.</p><p>Description. Female (Figs 18–24): Body length 24–25 mm, forewing length 16.3 mm.</p><p>Head (Figs 18–20): In frontal view circular. Mandible without inner subapical tooth. Clypeus moderately convex, without median carina; anterior margin of clypeus with three blunt teeth, lateral tooth broader than and as long as median tooth. Frontal line present. Ocelli equal in diameter. Vertical area behind hindocelli slightly raised above eyes. Occipital carina absent ventrally. Clypeus coarsely, sparsely punctate. Frons coarsely, irregularly transversely punctatorugose. Vertex and gena finely, sparsely punctate. Long, white setae sparsely distributed on clypeus, frons and gena. Distance between hindocelli about equal to that from midocellus to hindocellus, ½ × that from hindocellus to inner eye margin, and about 4.6 × that from hindocellus to vertex margin. Flagellar ratio (length of the first flagellomere divided by that of the second flagellomere) 0.94. Orbital ratio (shortest interocular width across vertex divided by shortest interocular width across clypeus) 0.66. Clypeal ratio (length of clypeus divided by shortest interocular width across clypeus) 0.91. Hypostomal cavity ratio (length of hypostomal cavity divided by width) 0.83.</p><p>Mesosoma (Figs 21, 22, 24): Conspicuously elongate, 3.25 × as long as high. Pronotum not regularly curved in lateral view, 1.4 × as wide as long, without notch at middle, and with series of transverse striae dorsally and laterally. Mesoscutum transversely striate, interspaces shallowly punctate. Mesopleuron densely punctate. Scutellum, metanotum, and metapleuron densely punctate. Propodeum densely, transversely striate dorsally and dorsolaterally, with pair of longitudinal furrows dorsally and dense punctations dorsolaterally. Legs with plantulae, tarsal claws with inner tooth.</p><p>Metasoma (Figs 23, 24): Integument smooth, dull, with white pubescence. Petiole slightly curved, its length 1.8 × that of hind basitarsus. Metasomal sterna III and IV without micro-pubescence, terminal sternum rounded apically.</p><p>Color (Figs 18–24): Integument dark green. Head and mesosoma with iridescent reflections. Flagellum, labial palpus, maxillary palpus, and tegula black. Mandible red in middle. Wings hyaline, forewing somewhat infuscate apically.</p><p>Male. Unknown</p><p>Etymology. The specific name is a Latin adjective referring to the iridescence of the species.</p><p>Distribution. Vietnam: Gia Lai.</p><p>Remark. Chalybion dolichothorax differs from other species of the C. madecassum species-group by a markedly elongate thorax (more than three times as long as high). Chalybion iridescens sp. nov. shares this character and, thus, is the second species with an elongate thorax in the species-group.</p></div>	https://treatment.plazi.org/id/038F87B9FFA4FFC877AFFDF0FC7622C9	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
038F87B9FFAAFFC877AFFEF5FA51270E.text	038F87B9FFAAFFC877AFFEF5FA51270E.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Chalybion madecassum (Gribodo 1882) Gribodo 1883	<div><p>Revised key to the species of the Chalybion madecassum group</p><p>The following key is expanded and revised from the key by Hensen (1988). Characteristics for the key were taken from the original descriptions of C. bonneti Leclercq (Leclercq 1966), C. madecassum (Gribodo) (Gribodo 1883), C. frontale (Kohl) (Kohl 1906), C. gracile Hensen and C. polyphemus Hensen (Hensen 1988), and the examination of C. gracile Hensen, C. dolichothorax Kohl, and C. iridescens Pham &amp; Ohl, sp. nov.</p><p>1. Mesosoma more than three times as long as high; propodeal dorsum with pair of longitudinal furrows; occipital carina evanescent ventrally............................................................................................ 2</p><p>- Mesosoma less than three times as long as high; propodeal dorsum without longitudinal furrows; occipital carina complete ventrally. Malagasy Subregion........................................................................... 3</p><p>2. Clypeus with longitudinal carina; inner eye margin conspicuously curved dorsally; vertex behind posterior ocelli conspicuously sloping; occipital carina lowered far from apical area; sterna III and IV largely covered with dense, brown micro-pubescence; apical edge of sternum IV not depressed; terminal metasomal sternum somewhat curved apically; body dark blue, head and mesosoma not iridescent......................................................... C. dolichothorax (Kohl, 1918)</p><p>- Clypeus without longitudinal carina; inner eye margin conspicuously curved at middle; vertex behind posterior ocelli moderately sloping; occipital carina highly raised near apical area; sterna III and IV not covered with brown micro-pubescence; apical edge of metasomal sternum IV conspicuously depressed; terminal metasomal sternum widely flat apically; body dark green, head and mesosoma iridescent.................................................... C. iridescens Pham &amp; Ohl, sp. nov.</p><p>3. Mesoscutum punctate to reticulate punctate; supra-antennal plate moderately protruding; males with placoids on flagellum. 4</p><p>- Mesoscutum transversely striate, with shallow punctures between striae; supra-antennal plate conspicuously protruding; males without placoids on flagellum........................................................................... 5</p><p>4. Petiole shorter than hind basitarsus; pronotum depressed medially; clypeal foremargin of females with three teeth; metasomal sterna IV depressed, with dense, yellow micro-pubescence. Madagascar ...................... C. bonneti Leclercq, 1966</p><p>- Petiole longer than hind basitarsus; pronotum not depressed medially; clypeal foremargin of females with five teeth; metasomal sterna IV undepressed, with sparse, silvery micro-pubescence. Madagascar and Mascarenes........................... C........................................................................... madecassum (Gribodo, 1883)</p><p>5. Dorsal margin of propodeal orifice conspicuously raised like lamella, Celebes ................... C. frontale (Kohl, 1906)</p><p>- Dorsal margin of propodeal orifice moderately raised like carina................................................ 6</p><p>6. Ocelli reduced, equal to mesopleuron puncture diameter, nearly flat; clypeal foremargin of female with five teeth. Philippines ............................................................................. C. polyphemus Hensen, 1988</p><p>- Ocelli usual, larger than mesopleuron puncture diameter, distinctly convex; clypeus of female with three teeth. Sri Lanka to Java and Borneo.................................................................... C. gracile Hensen, 1988</p></div>	https://treatment.plazi.org/id/038F87B9FFAAFFC877AFFEF5FA51270E	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.		MagnoliaPress via Plazi	Pham, Phong Huy;Ohl, Michael;Nguyen, Anh Thi Tu;Nguyen, Dinh Thi	Pham, Phong Huy, Ohl, Michael, Nguyen, Anh Thi Tu, Nguyen, Dinh Thi (2025): Taxonomy of the genus Chalybion Dahlbom, 1843 (Hymenoptera: Sphecidae) from Vietnam, with description of a new species. Zootaxa 5679 (4): 573-584, DOI: 10.11646/zootaxa.5679.4.6, URL: http://dx.doi.org/10.11646/zootaxa.5360.3.8
