Glutodon mikeaensis Azevedo & Colombo, 2022

Azevedo, Celso O. & Colombo, Wesley D., 2022, Glutodon gen. nov. (Hymenoptera, Bethylidae), a flap-metasomed Pristocerinae from Madagascar, Zootaxa 5124 (1), pp. 61-68 : 62-65

Glutodon mikeaensis Azevedo & Colombo , sp. nov.

( Figs. 1–3 )

Description. MALE. Body 3.9–5.25 mm long. Forewing 2.85–3.75 mm long. Antenna ~ 1.95–2.75 mm long.

Color. Head and mesosoma black, except pronotum castaneous; clypeus castaneous; antenna dark castaneous; palpi castaneous; mandible castaneous to dark castaneous; legs with coxae and anterior face of metafemur dark castaneous, otherwise castaneous; metasoma castaneous; wings subhyaline, veins castaneous to dark castaneous.

Head. Mandible with three apical teeth, two ventralmost sharpened, dorsalmost blunt and inclined. Clypeus with median lobe trapezoidal; median carina complete, high and angled in profile nearly apical clypeal margin. Antenna with pubescence densely velvet-like, suberect-erect, shorter than half of flagellomeral diameter, but progressively longer distad; first four antennomeres in a ratio of about 4:1:2:2. Vertex shorter than frons, vertex and temple evenly outcurved. Antennal rim shorter than wide, very divergent one to another, inter-torular space more than torular diameter, lateral area of antennal rim without paratorular flap-shaped expansion, surface between antennal rim and eye flat. Torulus with dorsal surface weakly convex in profile. Frons polished, punctures large, shallow and irregularly sparse. Eye with very short setae. Ocellar triangle with frontal angle acute, anterior ocellus posterior to supra-ocular line about its own widest diameter. Occipital carina conspicuous.

Mesosoma . Dorsal pronotal area shorter than anteromesoscutum, surface slightly depressed in forward direction, cervical pronotal area distinct, vertical, shorter than pronotal flange. Parapsidal signum well impressed, reaching both anterior and posterior margin of anteromesoscutum, evenly little wide, sinuous anteriorly, diverging posterad. Mesoscutum-mesoscutelar sulcus slightly arched. Metascutellum progressively narrowing posterad; metascutellar foveae deep, semicircular, separated by thin septum, metanotal foveae subtriangular; carinae of metanotal trough conspicuous. Metapectal-propodeal disc about 0.71 × as long as wide, mostly striate-rugulose, except polished at small center-posterior area, metapostnotal median carina complete, but weak posteriorly, metapostnotal lateral carina absent. Propodeal declivity coriaceous. Lateral surface of metapectal-propodeal complex striate. Mesopleuron with upper fovea wide and deep, sternaulus indistinct. Mesodiscrimen with surface deeply concave medially. Metasternum rugulose, with lateral and posterior margins carinate, median carina low and top-flatted. Hind wing with six equidistant distal hamuli. Claws with two teeth, basal tooth short as callus, apical one sharpened, distinctly long and curved.

Metasoma. Sternum II ecarinate, irregularly striate. Expansion of sternum VIII placed at central-median area, inner board elevated, posterior tip rounded. Hypopygium with spiculum ~0.25 × as long as hypopygeal plate; posterior margin conspicuously incurved medially.

Genitalia. Harpe very thick, inner surface concave to accommodate digitus and cuspis, somewhat subtriangular in lateral view, dorsal margin outcurved, ventral margin outcurved basally and straight apically, apical margin rounded. Gonostipe about as long as harpe laterally. Cuspis oblong, wide medially, apical margin rounded. Digitus with cross-section flat, strongly curved, tip not sharpened. Aedeagus very short, its apex aligned to dorsal margin of digitus, apical lobe dilated, with median expansion protruding posterad, apodeme straight, not dilated.

Material examined. Holotype, ♂, MADAGASCAR: Tulear Province , Mikea Forest, NW of Manombo, el. 30 m, 19 Feb–1 March 2002, 22° 54.22’ S, 43° 28.53’ E, Coll: M. Irwin, R. Harin’Hala, Malaise trap, in deciduous dry forest MA-02-18A-14 ( CASENT 21483379 ) . Paratype: 1♂, same data as holotype ( CASENT 21483380 ) .

Etymology. The specific epithet mikeaensis is an allusion to the type locality.

Figures

FIGURE 1. Habitus of holotype of Glutodon mikeaensis gen. et sp. nov. A. Dorsal view; B. Lateral view. Scale bars = 1 mm.

FIGURE 2. Holotype of Glutodon mikeaensis gen. et sp. nov. A. Head, frontal view; B. Mesopleuron, lateral view; C–D.Apex of metasoma; C. Ventral view; D. Lateral view. Arrow = sternal modification. Scale bars = 100 µm.

FIGURE 3. Paratype of Glutodon mikeaensis gen. et sp. nov. A. Hypopygium, inner view; B–C. Genitalia; B. Dorsal view, C. Ventral view. Scale bars = 100 μm.