Loboscelidia barbata, Hisasue & Pham & Mita, 2023

Hisasue, Yu, Pham, Thai-Hong & Mita, Toshiharu, 2023, Taxonomic revision of the genus Loboscelidia Westwood, 1874 (Hymenoptera: Chrysididae: Loboscelidiinae) from Vietnam, European Journal of Taxonomy 887 (1), pp. 1-68 : 9-12

Loboscelidia barbata sp. nov.

urn:lsid:zoobank.org:act:CF92A69F-EE81-4B29-9165-F6FA8EE078B9

Figs 3A , 5 , 25B

Etymology

Named after the Latin ‘ barbata ’, meaning ‘beard’, referring to the scale-like setae on the lower gena.

Type material

Holotype VIETNAM • ♂; Thua Thien Hue Province, Bach Ma NP , pheasant trail; 16.231° N, 107.852° E; 4 Aug. 2016; T. Mita leg.; VNMN.

Paratypes VIETNAM • 9 ♂♂; same collection data as for holotype; VNMN • 1 ♂; same collection data as for holotype but 15 Sep. 2022; VNMN • 1 ♂; same locality data as for holotype; 16 Sep. 2022; Y. Hisasue leg.; VNMN • 4 ♂♂; Thua Thien Hue Province, Bach Ma NP , Stone Sign ; 16.194° N, 107.865° E; 2 Aug. 2016; T. Mita leg.; VNMN • 1 ♂; Vinh Phuc Province, Tam Dao District, Tam Dao NP ; 21.453° N, 105.648° E; 4 Aug. 2016; K. Tsujii leg.; VNMN .

Description

Male ( Fig. 5A )

MEASUREMENTS. Body length 3.8–5.2 mm; forewing length 3.4–5.0 mm.

HEAD. Head ( Fig. 5B–D ) 1.8–1.9 times as long as high, 1.2–1.4 times as long as wide; inner ocular length 0.58 times as long as head width; frontal projection rectangular in frontal view ( Fig. 5B ); apical margin of frontal projection depressed ( Fig. 5C ); frons rugose, with low ridge extending from vertex along inner orbit of eye ( Fig. 5C ); frons with indistinct wrinkles towards median ocellus ( Fig. 5C ); frons with frontal line ( Fig. 5C ); spraclypeal area with transverse carinae ( Fig. 5B ); ftemple 0.50–0.71 times as long as MOD ( Fig. 5C ); POL 1.3–1.4 times as long as MOD; OOL 1.4–1.5 times as long as MOD; LOL 0.42–0.43 times as long as MOD; behind ocelli without transverse depression ( Fig. 5C ); cervical expansion convex in lateral view ( Fig. 5D ); cervical expansion with longitudinal furrow ( Fig. 5C ); basal part of cervical expansion constricted weakly in dorsal view ( Fig. 5C ); scape 2.9–3.2 times as long as wide; scape with longitudinal grooves; scape with transparent flange; F1 2.0–2.3 times as long as wide; F2 2.2–2.3 times as long as wide; F11 3.8 times as long as wide; relative length of F1–F11: 1.2: 1.2: 1.1: 1.1: 1.1: 1.0: 1.1: 1.0: 1.1: 1.1: 1.5.

MESOSOMA. Pronotum 0.79–0.81 times as long as posterior width of pronotum ( Fig. 5E ); posterior width of pronotum 1.5–1.6 times as wide as anterior width and 1.2 times as wide as head width; dorsolateral surface of pronotum carinate ( Fig. 5A ); notauli of scutum slightly curved, reaching posterior margin ( Fig. 5F ); scutellum punctured ( Fig. 5F ); scrobal sulcus present, weakly depressed ( Fig. 5F ); metanotum punctured, without ridge, 0.37–0.42 times as long as scutellum ( Fig. 5F ); propodeal angle strongly developed; upper area of propodeum without transverse carina; propodeum without transverse carina above foramen.

WINGS. Forewing ( Fig. 5G ) with M curved; cu-a 0.88–0.92 times as long as R; A longer than Cu+M; R1 0.43–0.54 times as long as R; Rs 2.4–2.8 times as long as R.

LEGS. Tibiae carinate; flange on forefemur 0.59–0.63 times longer, 0.90–1.1 times wider than tubular part of forefemur; flange on foretibia 0.57–0.58 times longer, 0.86–1.0 times wider than tubular part of foretibia; flange on midfemur 0.50–0.71 times longer, 0.70–0.80 times wider than tubular part of midfemur; flange on midtibia 0.62–0.68 times longer, 0.71–1.0 times wider than tubular part of midtibia; dorsolateral margin of hindcoxa with longitudinal carinae; basal part of hindfemur producing; hindfemur basally stout, slightly wider than distal part; ventral margin of hindfemur flat; outer surface of hindfemur carinate; flange on hindfemur 0.58–0.74 times longer, 0.91–0.92 times wider than tubular part of hindfemur; flange on hindtibia 0.75–0.83 times longer, 0.96–1.1 times wider than tubular part of hindtibia.

PILOSITY. Spraclypeal area with sparse decumbent and suberect cuneate setae ( Fig. 5B ); temple with sparse decumbent cuneate setae ( Fig. 5C ); lower gena with sparse decumbent scale-like setae ( Fig. 5D ); hypostoma with sparse decumbent scale-like setae; scape with sparse decumbent simple and cuneate setae; pedicel with sparse decumbent simple and cuneate setae; scutellum without setae ( Fig. 5F ); forecoxa with sparse decumbent cuneate setae; foretrochanter with sparse decumbent cuneate setae; forefemur with sparse decumbent cuneate setae; foretibia with sparse decumbent cuneate setae; midcoxa, midtrochanter, midfemur and midtibia with sparse decumbent cuneate setae; hindcoxa, hindtrochanter, hindfemur and hindtibia with sparse decumbent cuneate setae.

COLORATION. Body reddish brown to blackish brown; antenna blackish brown; legs blakish brown; flanges yellowish brown; ribbon-like setae whitish yellow.

Female

Unknown.

Distribution

Vietnam (Northern Vietnam, Central Vietnam) ( Fig. 26 ).

Remarks

Loboscelidia barbata sp. nov. resembles L. convexa sp. nov. and L. sisik in having the following characteristics: reddish brown ( L. convexa sp. nov.) to dark brown ( L. sisik ) body color, scale-like setae on the lower gena, and cervical expansion with longitudinal furrow ( L. convexa sp. nov.). However, L. barbata sp. nov. can be distinguished by the following characteristics: rectangular frontal projection (triangular in L. sisik ); strongly convex cervical expansion (weakly convex in L. sisik ); cervical expansion with longitudinal furrow ( L. sisik without longitudinal furrow); scape 2.9 times as long as wide (twice as long as wide in L. sisik ); pronotum 0.80 times as long as posterior width (0.70 times as long as the posterior width in L. convexa sp. nov.); metanotum that 0.40 times as long as scutellum (more than 0.50 times as long as the scutellum in L. convexa sp. nov.); midtibial flange present ( L. sisik absent); and longer A vein longer than Cu + M (as long as Cu + M in L. sisik ).

Figures

Fig. 3. Forewing venation of Loboscelidia Westwood, 1874. A. L. barbata sp. nov. B. L. fulgens Kimsey, 2012.

Fig. 5. Loboscelidia barbata sp. nov., holotype, ♂ (VNMN). A. Lateral habitus. B. Head, frontal view. C. Head, dorsal view. D. Head, lateral view. E. Pronotum, dorsal view. F. Mesosoma, dorsal view. G. Forewing. Scale bars: A = 1 mm; B–G = 0.5 mm.

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.

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).