Acrepyris masii ( Soika, 1933 ) Alencar & Colombo & Azevedo & Es & Teresa-Es & Vitória-Es, 2016

Alencar, Isabel D. C. C., Colombo, Wesley D., Azevedo, Celso O., Es, Rodovia, Teresa-Es, Santa & Vitória-Es, 2016, Pristocera masii: rediscovery of the holotype and its transfer to Acrepyris (Hymenoptera: Bethylidae), Acta Entomologica Musei Nationalis Pragae 56 (2), pp. 795-803 : 797-800

Acrepyris masii ( Soika, 1933) comb. nov.

Pristocera masii Soika, 1933: 99–101 (male). GORDH & MÓCZÁR (1990): 240 (catalog).

Material examined. HOLOTYPE: J, ‘Venezia / Lido / 24.VIII.1931 // Pristocera / masii n sp. / GIORDANI SOIKA DET. // Typus // HOLOTYPUS / Pristocera / masii / A. Giordani Soika, 1933 // Museu Civico di Genova’. The holotype is deposited in Museo Civico di Storia Naturale “Giacomo Doria” in Genova, Italy.

Redescription. Holotype (male). Body length 7.2 mm. Length of forewing ( LFW) 3.8 mm.

Color. Head, clypeus and mesosoma black except for antenna, pronotal collar and posterior end of pronotal disc that are dark castaneous; mandible, metasoma and legs castaneous, wings hyaline.

Head (Fig. 1). Mandible with five sharpened distal teeth, upper ones almost equally sized, upper tooth turned inwards. Clypeus short, with median lobe rectangular and apical margin slightly convex; median carina conspicuous, high and arched in profile. Antenna broken, left side with only first 11 antennomeres, scape arched, widened distad; flagellomeres long, basal flagellomeres (I–IV) wider than others; pubescence erect, setae short. Frons densely punctate. Ocellar triangle elevated, frontal angle acute, ocelli of normal size. Anterior ocellus placed posterior to imaginary line of eye top. Vertex convex; corner rounded. Temple slightly convergent posteriorly. Occipital carina complete, present ventrally and dorsally.

Mesosoma ( Figs 2–4 ). Thorax dorsum shinning, punctate, setae long. Pronotal disc trapezoidal; side slightly concave; anterior region elevated, rugulose-lacunose. Notaulus conspicuous, complete, convergent posteriorly, narrow, scrobiculate inside, reaching anterior and posterior margin of mesoscutum. Parapsidal furrow incomplete, conspicuous anteriorly, almost straight, narrow, shallow. Lateral area of mesoscutum elevated. Mesoscuto-scutellar sulcus deep, narrow, straight. Metanotum with large median elevation; median fovea sub-trapezoidal; metanotal groove foveolate laterally, first one oval. Metapectal-propodeal complex as long as wide, transverse anterior carina wide laterally and narrow medially, metapostnotal area rugulose; spiracle arched with rounded ends, placed completely at disc. Lateral surface of propodeum strigulate to areolate posteriorly. Propodeal declivity weak, convex in lateral view, areolate. Mesopleuron punctate except mesopleural callus elevate, polished and shinning; subtegular groove dilated anteriorly and uniformly narrow posteriorly, foveolate inside; episternal groove continuous to subtegular one, foveolate, foveae opened; mesopleural pit small and deep. Pleurosternum with heart-shaped large groove; acetabular carina wide medially, followed by large foveae; latero-posterior foveolate groove, foveae opened, present near mesocoxa. Tarsal claws trifid, teeth acute. Forewing with r-rs+Rs very long and slightly curved forward; R1b short; R1a truncate and inclined; pterostigma lanceolate and large. Hind wing with six apical hamuli.

Metasoma ( Figs 5–9 ). Hypopygium not divided, median stalk long, posterior margin dentate ( Fig. 5 ). Genitalia ( Figs 6–9 ). Paramere wide, shorter than basiparamere; apical margin convex dorsally and inclined dorsally in lateral view; ventral and dorsal margin almost straight, with Fig.1. Acrepyris masii ( Soika,1933) , holotype, male.– Head, weak concavity medially; external surface dorsal view. Scale bars = 100 μm.

densely setose. Basiparamere with dorsal margin convex apically and concave basally. Basivolsella long, margin strongly convex with some long setae. Digitus short, apical margin dentate, apex convex. Cuspis longer than digitus, arched, base with projection dorsad, apex convex. Aedeagus divided into three valves; dorsal valves as long as ventral ones, apex not divided, apical lobe narrow and curved ventrad, apex weakly rounded; middle valves as short as ventral ones, gradually widening basally, apical region with ventral concavity, apex projected ventrad, strongly rounded; ventral valves longer than middle valves and shorter than dorsal valves, apical region weakly pointed. Genital ring narrow. Basal ring reduced. Apodeme extending beyond genital ring.

Differential diagnosis. Within the Pristocerinae , there are several characters that place this species in Acrepyris , such as undivided hypopygium without lamellar lobes and aedeagus with three pairs of valves. The latter two characters are the most important to conclude that this species belongs to Acrepyris , because they distinguish it from related genera, e.g., Pristocera and Apenesia Westwood, 1874 . The aedeagal valves of this species are similar to that of A. orizabae (Cameron, 1897) because the dorsal valves are as long as the ventral ones, the apex is not divided and the apical lobe is narrow and curved ventrad; the middle valves are almost as short as the ventral ones and strongly rounded, and the ventral valves are longer than the middle valves and shorter than the dorsal valves, apical region weakly pointed. However, the paramere of A. masii is wide; basivolsella long; digitus with apical margin dentate, whereas A. orizabae has paramere short; basivolsella short and digitus without apical margin dentate.

Figures

Figs 2–4.Acrepyris masii (Soika, 1933), holotype, male. Mesosoma (2 – dorsal view, 3 – ventral view, 4 –lateral view). Scale bars = 100 μm.

Figs 5–9. Acrepyris masii (Soika, 1933), holotype, male. 5 – hypopygium, ventral view; 6 – genitalia, dorsal view; 7 – genitalia, ventral view; 8 – genitalia, lateral view; 9 – aedeagal valves, dorsal view. Scale bars = 15 μm (5–7) and 30 μm (8–9).