Loboscelidia mediata sp. nov.

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Figs 2D, 17, 25L

Etymology

Named after the Latin ‘ mediata ’, meaning ‘oblique’, referring to the unusual and deviant morphological characteristics of the genus Loboscelidia .

Type material

Holotype VIETNAM • ♂; Kon Tum Province, Chu Mom Ray NP, Bar Goc Station; 14.434° N, 107.720° E; 31 Apr.–4 May 2014; H.T. Pham; MT; VNMN.

Description

Male (Fig. 17A)

MEASUREMENTS. Body length 2.6 mm; forewing length 2.6 mm.

HEAD. Head (Fig. 17B–D) 1.7 times as long as high, 1.2 times as long as wide; inner ocular length 0.68 times as long as head width; frontal projection rectangular in frontal view (Fig. 17B); apical margion of frontal projection depressed (Fig. 17C); frons polished, with longitudinal striae (Fig. 17C); frons without ridge along inner orbit of eye (Fig. 17C); spraclypeal area with transverse carinae (Fig. 17B); temple 3.2 times as long as MOD (Fig. 17C); POL 1.7 times as long as MOD; OOL 2.4 times as long as MOD; LOL 0.57 times as long as MOD; behind ocelli with transverse depression (Fig. 17C); cervical expansion strongly convex in lateral view (Fig. 17D); basal part of cervical expansion strongly constricted in dorsal view (Fig. 17C); scape 4.4 times as long as wide; scape without longitudinal grooves; scape without transparent flange; F1 2.2 times as long as wide; F2 2.3 times as long as wide; F11 2.3 times as long as wide; relative length of F1–F11: 1.7: 1.4: 1.2: 1.2: 1.0: 1.0: 1.0: 1.0: 1.0: 1.0: 2.3.

MESOSOMA. Pronotum 0.95 times as long as posterior width of pronotum (Fig. 17E); posterior width of pronotum 1.4 times as wide as anterior width and 0. 80 times as wide as head width; dorsolateral surface of pronotum rounded (Fig. 17A); notauli of scutum straight, reaching posterior margin (Fig. 17F); scutellum polished (Fig. 17F); apico-lateral area of scutellum with longitudinal grooves (Fig. 17F); metanotum with two ridges; scrobal sulcus absent (Fig. 17A); metanotum 0.42 times as long as scutellum (Fig. 17F); propodeal angle weakly developed; propodeum without transverse carina above foramen.

WINGS. Forewing (Fig. 17G) with M curved; cu-a absent; A absent; R1 0.29 times as long as R; Rs 2.3 times as long as R.

LEGS. Tibiae smooth, without flanges; flange on forefemur 0.18 times longer, 0.60 times wider than tubular part of forefemur; flange on midfemur 0.16 times longer, 0.33 times wider than tubular part of midfemur; hindcoxa 2.3 times as long as hind trochanter; hindcoxa dorso-laterally carinate; basal part of hindfemur simple; hindfemur basally not stout, as wide as distal part; ventral margin of hindfemur swollen; outer surface of hindfemur smooth; flange on hindfemur 0.20 times longer, 0.60 times wider than tubular part of hindfemur; tarsal claw of hindtibia with one tooth and not extending half of tarsal claw (Fig. 25L).

PILOSITY. Scape with sparse suberect cuneate and forked setae (Fig. 17B); pedicel with sparse suberect cuneate setae; gena and frontal projection with separate ribbon-like setae; dorsal rurface of pronotum with sparse suberect and erect forked setae (Fig. 17E); dorso-frontal margin of pronotum with short ribbon-like setae; lateral surface of pronotum with sparse suberect and erect forked setae; propleuron with sparse suberect and erect forked setae; scutum with sparse suberect and erect forked setae (Fig. 17F); mesopleuron with sparse suberect and erect forked setae; tegula with sparse suberect and erect forked setae; scutellum with dense suberect forked setae; forecoxa with sparse decumbent simple and cuneate setae; foretrochanter with sparse suberect simple setae; midcoxa with sparse decumbent cuneate setae; midtrochanter with sparse suberect simple setae; hindcoxa with sparse decumbent cuneate setae; hindtrochanter with sparse decumbent cuneate setae.

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

Female

Unknown.

Distribution

Vietnam (Central Vietnam) (Fig. 28).

Remarks

This species can be easily distinguished from other species by the shorter ribbon-like setae and forked setae, similar to another genus Rhadinoscelidia . We assigned this new species to Loboscelidia because it has the developed wing venation; however, other characteristics (e.g., long scape with dense erect or suberect setae; cervical expansion with shorter ribbon-like setae; pronotum with forked erect setae; and tibiae without flanges) are rather similar to those of Rhadinoscelida.