Loboscelidia convexa, 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 : 14-17

Loboscelidia convexa sp. nov.

urn:lsid:zoobank.org:act:F7440305-3E38-42DE-BEC6-74CDC8F64B4B

Figs 7, 25D

Etymology

Named after the Latin ‘ convexa ’, meaning ‘convex’, referring to the distinctly convex cervical expansion.

Type material

Holotype

VIETNAM • ♂; Bac Kan Province, Ba Be NP; 22°24′42.24″ N, 105°37′42.55″ E; 2 Jul. 2014; T. Mita leg.; VNMN.

Description

Male ( Fig. 7A)

MEASUREMENTS. Body length 4.0 mm; forewing length 4.0 mm.

HEAD. Head ( Fig. 7B–D) 1.8 times as long as high, 1.1 times as long as wide; inner ocular length 0.57 times as long as head width; frontal projection rectangular in frontal view ( Fig. 7B); apical margion of frontal projection depressed ( Fig. 7C); frons with transverse microstriae, with high ridge extending from vertex along inner orbit of eye ( Fig. 7C); frons with indistinct wrinkles towards median ocellus ( Fig. 7C); frons with frontal line; spraclypeal area with transverse carinae ( Fig. 7B); temple 0.73 times as long as MOD ( Fig. 7C); POL 1.1 times as long as MOD; OOL 1.3 times as long as MOD; LOL 0.33 times as long as MOD; behind ocelli with transverse depression ( Fig. 7C); cervical expansion strongly convex in lateral view, with longitudinal grooves ( Fig. 7D); basal part of cervical expansion constricted weakly in dorsal view ( Fig. 7C); scape 2.8 times as long as wide; scape with longitudinal grooves; scape with transparent flange; F1 1.8 times as long as wide; F2 2.0 times as long as wide; F11 3.6 times as long as wide; relative length of F1–F11: 1.2: 1.1: 1.1: 1.1: 1.1: 1.1: 1.1: 1.1: 1.0: 1.0: 1.4.

MESOSOMA. Pronotum 0.71 times as long as posterior width and convex in lateral view ( Fig. 7E); posterior width of pronotum 1.5 times as wide as anterior width and 1.1 times as wide as head width; dorsolateral surface of pronotum carinate ( Fig. 7A); notauli of scutum slightly curved, reaching posterior margin ( Fig. 7F); scutellum punctured, with lateral carina ( Fig. 7F); scrobal sulcus present, weakly depressed ( Fig. 7A); metanotum without ridge, 0.61 times as long as scutellum ( Fig. 7F); propodeal angle weakly developed; propodeum with transverse carina above foramen.

WINGS. Forewing ( Fig. 7G) with M curved; cu-a 0.72 times as long as R; A extending Cu+M; R1 0.64 times as long as R; Rs 2.4 times as long as R.

LEGS. Tibiae carinate; flange on forefemur 0.65 times longer, 1.1 times wider than tubular part of forefemur; flange on foretibia 0.67 times longer, 0.83 times wider than tubular part of foretibia; flange on midfemur 0.72 times longer, as wide as tubular part of midfemur; flange on midtibia 0.76 times longer, 0.83 times wider than tubular part of midtibia; hindcoxa 2.5 times as long as hind trochanter; hindcoxa dorso-laterally carinate; basal part of hindfemur strongly producing; hindfemur basally stout, apparently wider than distal part; ventral margin of hindfemur flat; outer surface of hindfemur smooth; flange on hindfemur 0.79 times longer, 1.3 times wider than tubular part of hindfemur; flange on hindtibia 0.83 times longer, 1.1 times wider than tubular part of hindtibia.

PILOSITY. Spraclypeal area with sparse suberect cuneate setae ( Fig. 7C); temple with sparse decumbent cuneate setae; lower gena with sparse decumbent cuneate setae ( Fig. 7D); hypostoma with sparse decumbent and suberect simple cuneate setae; propleuron with sparse decumbent cuneate and scale-like setae ( Fig. 7A); forecoxa and foretrochanter with dense decumbent cuneate setae; foretibia with sparse decumbent suberect simple and cuneate setae; midcoxa and midtrochanter with dense decumbent cuneate setae; midtrochanter with sparse decumbent cuneate setae; midfemur with sparse decumbent and suberect simple cuneate setae; hindcoxa and hindtrochanter with sparse decumbent cuneate setae; hindfemur and hindtibia with sparse decumbent and suberect simple and cuneate setae.

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

Female

Unknown.

Distribution

Vietnam (Northern Vietnam) ( Fig. 26).

Remarks

Loboscelidia convexa sp. nov. resembles L. asiana , L. barbata sp. nov. and L. sisik in having the following characteristic: scale-like setae on the lower gena. However, L. convexa sp. nov. can be distinguished by the following characteristics: lower gena bearing cuneate setae (with scale-like setae in other species); rectangular frontal projection (triangular in L. asiana and L. sisik ); smooth cervical expansion with longitudinal furrow (without longitudinal furrow in L. asiana and L. sisik ); and curved M vein (straight in L. sisik ).