Leiosema lesiolouna Heraty & Burks, 2017

Burks, Roger A., Heraty, John M., Mottern, Jason, Dominguez, Chrysalyn & Heacox, Scott, 2017, Biting the bullet: revisionary notes on the Oraseminae of the Old World (Hymenoptera, Chalcidoidea, Eucharitidae), Journal of Hymenoptera Research 55, pp. 139-188 : 169-172

Leiosema lesiolouna Heraty & Burks sp. n. Figs 61 , 62 , 64 , 66

Etymology.

Named for the collection locality of the holotype.

Diagnosis.

The female is unknown, but the male is easily distinguished by the 3:3 dentate mandibles (Fig. 62 ), strongly reticulate mesoscutal midlobe and scutellar disc, and all tibiae yellow. It can be further differentiated from L. glabra by the anteriorly extended reticulate pronotal neck (Fig. 61 ), and petiole 4.7 × as long as broad, with a strong transverse basal carina (flange) but without a lateral carina.

Male.

Length 1.6 mm. Head and mesosoma blue. Scape brown; pedicel brown; anellus yellowish brown; flagellum brown. Mandible yellow, ventral mandibular setae acute; maxilla and labium yellowish brown. Coxae dark blue; fore and mid femur mostly brown, apically yellowish; hind femur mostly dark brown to black, apically yellow; tibiae yellow, but with hind tibia slightly darker basally. Fore wing hyaline; venation clear. Petiole same color as mesosoma; gaster dark brown; acrosternite same color as petiole.

Head (Figs 61 - 62 ) 1.2 × as broad as high; inter-ocular distance 1.2 × eye height; malar space 0.4 × eye height; supraclypeal area longer than broad, smooth; clypeus smooth; epistomal sulcus distinct and sharply defined; anteclypeus distinct, straight. Mandibular formula 3:3, apical tooth elongate. Maxilla and labium of normal size, palpal formula 3:2. Occiput striate, shallowly emarginate in dorsal view, dorsal margin evenly rounded, temples present, rounded and coriaceous. Antenna 11-segmented; scape narrow and cylindrical, not reaching median ocellus; pedicel subconical, as broad as F1; flagellum 1.4 × head height; anellus minute, difficult to distinguish, F2 1.2 × as long as broad, 1.2 × as long as F3; following funiculars subequal in length, equal in width; clava subcylindrical, longer than preceding 2 funiculars, clava without distinct separation of fused clavomeres.

Mesosoma (Figs 61 , 64 ). Mesoscutal midlobe reticulate, interstices rounded, dorsally with few sparse setae; lateral lobe smooth and shining; notauli deeply impressed. Axilla smooth; dorsally rounded, on roughly same plane as scutellum; scutoscutellar sulcus broad, irregularly foveate. Scutoscutellar sulcus meeting transscutal articulation; scutellar disc about 1.5 × as long as broad, reticulate, smooth just anterior to frenal line; frenal line as distinct crenulate groove; axillular sulcus distinct and foveate; axillula very weakly reticulate. Propodeal disc broadly rounded, without depression or carina, rugose-areolate; callus smooth, with several long hairs; callar nib absent. Prepectus evenly triangular, sculpture broadly foveate. Mesepisternum reticulate laterally, smooth ventrally, broadly rounded anterior to mid coxa. Upper mesepimeron smooth; lower mesepimeron smooth; transepimeral sulcus distinct. Propleuron convex, smooth. Postpectal carina prominent. Hind coxa 1.8 × as long as broad, smooth with very weak reticulate sculpture; hind femur 5.7 × as long as broad, with even cover of appressed long setae; hind tibia densely setose. Fore wing 2.4 × as long as broad; basal cell and speculum bare, costal cell and wing disc densely setose, wing disc setae long; marginal fringe relatively long; submarginal vein with several long setae; marginal vein with minute setae; stigmal vein more than 2.5 × as long as broad, slightly angled, slightly narrowed basally and capitate apically (Fig. 66 ); uncus absent; stigma with 3 sensilla in a straight line; postmarginal vein 1.9 × as long as stigmal vein. Hind wing costal cell with a broad bare area.

Metasoma. Petiole cylindrical, linear in profile, 4.6 × as long as broad, 1.7 × as long as hind coxa, reticulate, anterior carina strong, lateral margin rounded, ventral sulcus present with margins narrowly separated. Antecostal sulcus rugulose; acrosternite posteriorly angulate, raised and smooth medially and laterally broadly impressed and reticulate. Genitalia protruding: parameres elongate, digitus broad and flattened with 4 marginal spines.

Female.

unknown.

Holotype.

Republic of Congo: Pool Dept.: Iboubikro, Lesio-Louna Pk., 340m, 3°16'12"S, 15°28'16"E, 23.vii.2008, Sharkey & Braet, Malaise trap #3 [1♂, UCRC: UCRCENT00408466].

Figures

Figs 56 - 67. Leiosema glabra. Male: 56 antenna, lateral (Tanzania, TZ) 57 head, frontal, (Yemen) 58 head, oblique (TZ). Female holotype 59 head and mesosoma, dorsal; Male: 60 head and mesosoma, dorsal (South Africa) 63 mesosoma, lateral (SA) 65 wings, dorsal (TZ) 66 stigmal vein (TZ) 67 propodeum and petiole, oblique (TZ). Leiosema lesiolouna. Holotype male: 61 head and mesosoma, dorsal 62 head, oblique 64 head and mesosoma, lateral. acr = acrosternite; apc = anterior petiolar carina; F = flagellomere; frn = frenum; lbr = labrum; no 1 = pronotum; scp = scape; vp = ventral pores.