Acroclisoides megacephalus Girault & Dodd, 1915

Tselikh, Ekaterina V., Mitroiu, Mircea-Dan, Lee, Jaehyeon, Dale-Skey, Natalie & Ku, Deok-Seo, 2025, Revision of Acroclisoides Girault & Dodd, 1915 (Chalcidoidea, Pteromalidae, Metasteninae), ZooKeys 1257, pp. 153-214 : 153-214

Acroclisoides megacephalus Girault & Dodd, 1915

Figs 89–96

Acroclisoides megacephalus Girault & Dodd, 1915: 334 . Holotype female ( QMBA, examined).

Type material.

Holotype • female, Australia, “ Acroclisoides megacephalus Girault & Dodd ♀ ”, “ TYPE ”, “ HOLOTYPE Hy. 2804 E. C. D. 1984 ”, “ Photographed specimen ” ( QMBA).

Additional material examined.

Australia • 1 female, “ Cooloola N: P. 7. III. 84 L. Masner S. QUEENSLAND ”, “ Acroclisoides ♀ det. Z. Bouček, 1984 ”, “ NHMUK 013455983 ” ( ZISP) • 1 female, Australia, “ SE. QUEENSLAND Mt. Tamborine XI. 1977 Mal. Trap. ”, “ Acroclisoides megacephalus Gir. det. Z. Bouček, 1985 ”, “ NHMUK 013455913 ” ( NHMUK) .

Description.

Female. Body length 2.60–2.70 mm; fore wing length 2.00– 2.10 mm.

Coloration. Head and mesosoma dorsally blue green with diffuse metallic coppery luster; antenna with scape, pedicel, anelli yellowish brown, F 1 – F 6 and clava brown. Fore and hind coxae dark blue green with diffuse metallic coppery luster, mid coxae yellowish brown, all femora yellowish brown, all tibiae and tarsi yellow. Fore wing with one spot near S, venation brown. Metasoma dorsally dark brown with metallic violet and blue luster; ovipositor sheaths brown.

Sculpture. Head and mesosoma reticulate; clypeus striate; scutellum, frenal area and propodeum strongly reticulate, nucha alutaceous; petiole smooth; metasoma smooth and shiny.

Head. In dorsal view 2.54–2.59 × as broad as long and 1.40–1.42 × as broad as mesoscutum; in frontal view 1.64–1.65 × as broad as high. POL 0.55–0.57 × as long as OOL. Eye height 1.10–1.13 × eye length and 1.65–1.70 × malar space. Distance between antennal toruli and lower margin of clypeus 3.07–3.40 × distance between antennal toruli and median ocellus. Antenna with scape 0.94–0.96 × as long as eye height and 1.05–1.07 × as long as eye length; pedicel 1.20–1.33 × as long as broad; combined length of pedicel and flagellum 0.88–0.95 × breadth of head; F 1 – F 6 longer than broad, F 1 2.18–2.20 × as long as broad and with three rows of sensilla; clava 2.72–3.00 × as long as broad, with small microsetose area on C 3 and C 4. Lower posterior corner of gena with sharp spine. Lower margin of clypeus concave bilaterally, in middle part weakly emarginate, near straight.

Mesosoma. 1.15–1.18 × as long as broad. Scutellum moderately arched, 0.77–0.85 × as long as broad, frenal area distinguished by a change in sculpture. Propodeum 0.70–0.72 × as long as scutellum, without costula but with median carina, nucha small. Fore wing 2.21–2.25 × as long as its maximum width; basal cell with 6–7 setae, basal vein setose; speculum closed below; M 0.73–0.85 × as long as PM and 1.18–1.22 × as long as S, stigma large.

Metasoma. 1.81–1.90 × as long as broad, 1.04–1.25 × as long as mesosoma, 0.68–0.85 × as long as mesosoma and head. Petiole 0.50–0.60 × as long as broad. Ovipositor sheaths projecting slightly beyond apex of metasoma.

Male. Unknown.

Biology.

Egg parasitoids of the hemipteran Axiagastus cambelli Distant ( Pentatomidae ) ( UCD Community, 2025).

Distribution.

Australia ( Girault 1915).

Comments.

Acroclisoides megacephalus Girault & Dodd belongs to a group of species where females have a fore wing with one spot near S. This species is similar to A. maculatus Sureshan & Narendran ; the differences between these species are given in the key.

Figures

Figures 89–96. Acroclisoides megacephalus Girault & Dodd, 1915, female, holotype 90. and female, not type 89, 91–96. 89. Habitus, lateral view; 90. Mesosoma and propodeum, dorsal view; 91. Antenna; 92. Head, frontal view; 93. Fore wing; 94. Head, lateral view; 95. Habitus, dorsal view; 96. Head and pronotum, dorsal view.