Glenosema ebazileyo Azevedo & van Noort, 2019

Azevedo, Celso O. & Noort, Simon Van, 2019, Review of Afrotropical Glenosema Kieffer (Hymenoptera, Bethylidae) with description of 13 new species, Zootaxa 4585 (3), pp. 401-437 : 408-409

Glenosema ebazileyo Azevedo & van Noort , sp. nov.

Fig. 4

Description, holotype ♀. Body length 2.0 mm. Forewing length: shorter than tegula.

Colour. Head black, mandible, antenna and palpi castaneous; mesosoma black, except anterior part of pronotal collar and posterior border of pronotal disc dark castaneous, tegula castaneous, legs castaneous, with tarsi light castaneous; metasoma dark castaneous with posterior half of each segment lighter.

Head. Mandible 0.71 × LH, only slightly widened distally, with seven distal teeth, lower tooth large, not visible in full frontal view, completely directed inward, six upper teeth in little inclined series, both dorsal and ventral margins denticulate, last dorsal tooth conspicuous. Clypeus very short, its surface subvertical but perceptible in full dorsal view, triangular in frontal view, apical margin with median callus, almost straight in frontal view, lateral lobe absent; median clypeal carina absent. Antennal foramina distant each other about 2.7 × antennal foramen diameter. First four antennomeres in ratio of 25:13:5:6. Scape long and curved, slightly wider subdistally; pedicel about 2.0 × as long as wide; proximal flagellomeres slightly longer than wide, progressively lengthening distad; flagellar pubescence dense, short and sub-erect. Eye subtriangular, small, placed at middle-dorsal area of head in lateral view, with few short setae. Frons from polished to weakly coriaceous anteriorly, punctures very small, but conspicuous, shallow, sparse; frontal line absent, area elevated but not forming carina. LH 1.05 × WH. WF 0.62 × WH. WF 1.57 × HE. OOL 4.13 × WOT. VOL 1.32 × HE. Distance of posterior ocellus to vertex crest 0.5 × DAO. Distance of anterior ocellus to supra-ocular line 6.5 × DAO. Frontal angle of ocellar triangle very acute; ocelli tiny, hardly seen at median magnification, only slightly larger than punctures; ocellar triangle elongate, POL 1.2 × DAO. Vertex almost straight medially. Sides of head posterior to eye converging posterad. Occipital carina complete. Malar space very small and triangular, eye almost touching dorsal mandibular condyle. Hypostomal carina evenly slightly curved, not angled medially. Palpal formula 6:3.

Mesosoma. Dorsal pronotal area polished centrally and weakly coriaceous peripherally, subquadrate, slightly longer than wide; slope of pronotal collar almost vertical in profile. Mesonotum coriaceous, divided into anteromesoscutum and mesoscutellar-axillary complex, transscutal fissure not outlined. Anteromesoscutum very short, transverse, its surface flat and inclined backward in profile, shorter than mesoscutellum, without notauli and parapsidal signal. Mesoscutellar-axillary complex very short, transverse, its surface inclined forward in profile, mesoscutellar sulcus absent. Metanotum not visible dorsally. Metapectal-propodeal disc mostly weakly coriaceous with small antero-central area polished, surface little convex, very sparsely and shortly setose, median length 1.16 × median width, metapostnotal median carina absent; sublateral and lateral carinae absent; posterior carina complete; spiracle elliptical, small, placed at lateral surface. Propodeal declivity with its surface subvertical, flat, median carina absent. Prosternum small and concave. Mesopleuron with its surface convex, evenly convex in dorsal view. Micropterous, forewing not visible, entirely covered by tegula. Mesotibia not spinose. Tarsal claw arched with small medial tooth.

Metasoma. Elongate, 1.5 × mesosoma. Anterior half of each tergum polished and posterior half weakly coriaceous. Petiole with half-dome protuberance on ventral surface, with longitudinal carinate-shaped line.

Variation. Head, pronotal disc, legs, metasoma lighter. General texture stronger, especially in the metapectalpropodeal disc. Median clypeal callus more conspicuous. Anteromesoscutum longer, almost as long as mesoscutellar-axillary complex.

Material examined. Holotype ♀, South Africa, Western Cape, Jacobsbaai, N of Saldanha Bay, 32°58’S 17°54’E, 7 Oct–7 Nov 1996, H.G. Roberston, ex pitfall trap, West Coast Strandveld (SAM-HYM-A027209) . Paratypes. South Africa, Western Cape: 1♀ Jacobsbaai, N of Saldanha Bay, 602 m, 32°58’S 17°54’E, 0 7 November-13 December 1996, H.G. Roberston, ex pitfall trap, West Coast Strandveld (SAM-HYM-P08747) ; 1♀, Jacobsbaai, N of Saldanha Bay, 32°58’S 17°54’E, 13 March–16 April 1997, H.G. Roberston, ex pitfall trap, West Coast Strandveld (SAM-HYM-P08748) ; S. Africa, N. Cape: 1♀, Charlie’s Hoek farm, Charlie’s site (4.60 km 60° ENE Nieuwoudtville ), 31°20.755’S 19°08.662’E, Natural veg. on dolerite, 12–19 Oct 2000, HG Robertson, D Larsen, R Adams; pitfall, NW00-DN1-P05 (SAM-HYM-P0024536) .

Diagnosis. This species is similar to G. qaqambile sp. nov. and G. tyaba sp. nov. by having the same ground plan (see Diagnosis of G. qaqambile sp. nov.). This species, however, has the anteromesoscutum and the mesoscutellum flat and both surfaces inclined toward each other, whereas in the other similar species the anteromesoscutum and the mesoscutellum are concave in profile.

Etymology. The specific epithet ebazileyo is an adjective from IsiXhosa, which means acute, in allusion to the very acute frontal angle of the ocellar triangle.

Distribution. South Africa.

Figures

FIGURE 4. Glesonema ebazileyo sp. nov., holotype female. A. Habitus, lateral; B. Mesosoma, dorsal; C. Head, dorsal; D. Labels.