Taxonomic revision of the genus Loboscelidia Westwood, 1874 (Hymenoptera: Chrysididae: Loboscelidiinae) from Vietnam Author Hisasue, Yu D2E20D5E-B406-4169-9B1D-A4D0078D06EE Entomological Laboratory, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, Fukuoka, 819 - 0395, Japan. & Ogasawara Division of Japan Wildlife Research Center, Okumura, Chichijima, Ogasawara, Tokyo 100 - 2101, Japan. hybrizonist@gmail.com Author Pham, Thai-Hong B226B19B-509B-4878-B2FD-8505B688A1D2 Mientrung Institute for Scientific Research, Vietnam National Museum of Nature, Vietnam Academy of Science and Technology (VAST), 321 Huynh Thuc Khang, Hue, Vietnam. & Graduate School of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Hanoi, Vietnam. phamthai@vnmn.vast.vn Author Mita, Toshiharu 6CC49F2C-C91C-463C-9C2D-8269588E1A6A Entomological Laboratory, Faculty of Agriculture, Kyushu University, 744, Motooka, Nishi-ku, Fukuoka, 819 - 0395 Japan. t3mita@agr.kyushu-u.ac.jp text European Journal of Taxonomy 2023 2023-08-04 887 1 1 68 http://zoobank.org/788ae14a-0698-4c42-819c-bc2412f76fca journal article 60724 10.5852/ejt.2023.887.2203 e07425be-9a2c-4459-aa8b-b51c90eafc0f 2118-9773 8222523 788AE14A-0698-4C42-819C-BC2412F76FCA Loboscelidia vietnamensis sp. nov. urn:lsid:zoobank.org:act: B71E7738-E5FB-4D91-9643-EF4752F3472A Figs 2A , 24 , 25Q Etymology The specific named after the type country, ‘Vietnam’. Type material Holotype VIETNAM • ♂ ; Thua Thien Hue Province , Bach Ma NP , 19 km point; 16.198° N , 107.860° E ; 3–6 Aug. 2016 ; T. Mita and Y. Komeda leg.; YPT ; VNMN . Paratype VIETNAM • 1 ♂ ; Ninh Binh Province , Cuc Phuong NP ; Y. Komeda leg.; VNMN . Description Male ( Fig. 24A ) MEASUREMENTS . Body length 3.05 mm ; forewing length 2.8 mm . HEAD . Head ( Fig. 24B–D ) 1.8 times as long as high; 1.2–1.3 times as long as wide; inner ocular length 0.59 times as long as head width; frontal projection rectangular in frontal view ( Fig. 24B ); apical margin of frontal projection depressed; lower part of frontal projection longer than upper part ( Fig. 24D ); frons granulate, finely microstriate ( Fig. 24C ); frons with low ridge extending from median ocellus along inner orbit of eye ( Fig. 24C ); spraclypeal area with transverse carinae ( Fig. 24B ); temple 0.24–0.30 times as long as MOD ( Fig. 24C ); POL 1.2–1.3 times as long as MOD; OOL 1.3–1.7 times as long as MOD; LOL 0.33–0.38 times as long as MOD; behind ocelli without transverse depression ( Fig. 24C ); cervical expansion convex in lateral view ( Fig. 24D ); basal part of cervical expansion constricted weakly in dorsal view ( Fig. 24C ); scape polished, 2.5 times as long as wide; scape without longitudinal grooves ( Fig. 24B ); F1 1.8–2.0 times as long as wide; F2 2.0 times as long as wide; F11 3.2–3.3 times as long as wide; relative length of F1–F11: 1.0: 1.0: 1.0: 1.1: 1.1: 1.1: 1.1: 1.1: 1.1: 1.0: 1.6. MESOSOMA . Pronotum 0.76 times as long as posterior width of pronotum ( Fig. 24E ); posterior width of pronotum 1.4–1.6 times as wide as anterior width and 1.1–1.2 times as wide as head width; dorsolateral surface of pronotum carinate ( Fig. 24A ); notauli of scutum parallel, not reaching posterior margin ( Fig. 24F ); scutellum polished, with lateral carina ( Fig. 24F ); scrobal sulcus present, strongly depressed; metanotum with medial low ridge; metanotum 0.42–0.50 times as long as scutellum ( Fig. 24F ); propodeal angle weakly developed; propodeum without transverse carina above foramen. Fig. 24. Loboscelidia vietnamensis sp. nov. , holotype, ♂ (VNMN). A . Lateral habitus. B . Head , dorsal view. C . Head , frontal view. D . Head , lateral view. E . Pronotum, dorsal view. F . Mesosoma, dorsal view. G . Forewing. Scale bars: A, E–G = 0.5 mm; B–D = 0.2 mm. WINGS . Forewing ( Fig. 24G ) with M curved; cu-a 0.33–0.60 times as long as R; A extending half of Cu+M; R1 0.83–0.90 times as long as R; Rs 3.0–3.2 times as long as R. Fig. 25. Hind tarsal claw of Loboscelidia Westwood, 1874 . A . L. bachmaensis sp. nov. B . L. barbata sp. nov. C . L. cilia sp. nov. D . L. convexa sp. nov. E . L. cucphuongensis sp. nov. F . L. cuneata sp. nov. G . L. do sp. nov. H . L. flavipes sp. nov. I . L. fulgens Kimsey, 2012 . J . L. glabra sp. nov. K . L. komedai sp. nov. L . L. mediata sp. nov. M . L. parallela sp. nov. N . L. piriformis sp. nov. O . L. squamosa sp. nov. P . L. vang sp. nov. Q . L. vietnamensis sp. nov. LEGS . Tibiae carinate; flange on forefemur 0.56–0.60 times longer, as wide as tubular part of forefemur; flange on foretibia 0.55–0.72 times longer, 0.63–1.0 times wider than tubular part of foretibia; flange on midfemur 0.78–0.84 times longer, 1.1 times wider than tubular part of midfemur; flange on midtibia 0.70–0.88 times longer, 0.75–0.86 times wider than tubular part of midtibia; hindcoxa dorso-laterally carinate; basal part of hindfemur producing, strongly producing, simple; hindfemur basally stout; ventral margin of hindfemur flat; outer surface of hindfemur smooth; flange on hindfemur 0.78–0.94 times longer, 0.79–0.89 times wider than tubular part of hindfemur; outer surface of hindtibia smooth; flange on hindtibia 0.74–0.80 times longer, 1.5–2.0 times wider than tubular part of hindtibia. Fig. 26. Distribution map of Loboscelidia spp. in Vietnam. L. asiana Kimsey, 1988 (read circle). L. bachmaensis sp. nov. (dark blue circle). L. barbata sp. nov. (yellow circles). L. cilia sp. nov. (green circle). L. convexa sp. nov. (pink circle). L. cucphuongensis sp. nov. (gray circles). PILOSITY . Temple with sparse decumbent simple setae ( Fig. 24D ); cervical expansion with sparse decumbent and suberect simple setae; scape with sparse decumbent and suberect simple setae; pedicel with sparse suberect simple setae; dorsal part of pronotum with sparse decumbent and suberect simple setae ( Fig. 24A, F ); lateral part of propodeum with sparse decumbent and suberect simple setae; forefemur with sparse decumbent and suberect simple setae; hindcoxa with sparse decumbent cuneate setae. COLORATION . Body reddish brown; antenna reddish brown; legs reddish brown; flanges yellowish brown; ribbon-like setae whitish yellow. Fig. 27. Distribution map of Loboscelidia spp. in Vietnam. L. cuneata sp. nov. (purple circles). L. defecta Kieffer, 1916 (gold circle). L. do sp. nov. (white circles). L. flavipes sp. nov. (black circle). L. fulgens Kimsey, 2012 (light blue circles). L. glabra sp. nov. (brown circle). Female Unknown. Distribution Vietnam (Northern Vietnam , Central Vietnam ) ( Fig. 29 ). Remarks This species closely resembles L. bachmaensis sp. nov. ; however, it can be distinguished by the following combined characteristics: frontal projection longer than above in lateral view (equal to shorter than above in L. bachmaensis sp. nov. ); shorter temple, about 0.20 times as long as MOD (0.80 times as long as MOD in L. bachmaensis sp. nov. ); pronotum as long as head width (much wider than head in L. bachmaensis sp. nov. ); tooth of hindtarsal claw less than 0.2 times as long as hindtarsal claw (longer than 0.4 times as long as hindtarsal claw).