Loboscelidia barbata Hisasue & Pham & Mita 2023, sp. nov.

Loboscelidia barbata sp. nov.

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

Figs 3A, 5, 25B

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

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.

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.

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

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).