Macroglenes gibsoni, Mitroiu, Mircea-Dan, 2010

Mitroiu, Mircea-Dan, 2010, Revision of the Palearctic species of Macroglenes Westwood (Hymenoptera: Pteromalidae), Zootaxa 2563, pp. 1-34 : 17-18

Macroglenes gibsoni sp. nov.

(Fig. 25)

Etymology. The species is named for Dr. Gary Gibson, in recognition for his contributions to the knowledge of the world Eupelmidae and Pteromalidae .

Diagnosis. Body black, without metallic reflections; clypeal margin not incised (cf. Figs 1–2); F4 and F5 large, with sensilla (cf. Fig. 4); mesosoma clearly arched dorsally, with scutellum globose (cf. Fig. 9); pecten well developed, about 3/4 length of the hind tibia (cf. Fig. 15); forewing with bare area between R and apical margin; ovipositor sheaths about 0.7–0.8X as long as hind tibia (Fig. 25); hypopygium reaching about 3/4 length of gaster. Male with scape normal and eyes enlarged (cf. Fig. 2).

Description. Female.

Body length. 1.5–1.6 mm.

Color. Body black, eye pale red, antenna and legs brown, tarsi somewhat paler, tegula and venation brown, wings hyaline, mandible yellowish-brown.

Head. In frontal view width about 1.1X height and width about 2.1X length in dorsal view. POL about 1.4–1.6X as long as OOL. Eye height 1.33–1.35X length. Malar space about 0.3X as long as eye height. Scape length about 3.5X width, clearly shorter than eye height. Pedicel length about 1.3X width. Combined length of pedicel and flagellum slightly shorter than head width. F1–F3 small, anelliform, without sensilla, having about the same diameter; their combined length half as long as pedicel; F4–F5 large, with sensilla, both distinctly transverse: F4 width about 1.3–1.6X length, F5 width about 1.5– 2 X length; clava length about 2.2X width.

Mesosoma. Clearly arched dorsally, length about 1.3–1.4X width, length about 1.4X height. Scutellum appearing globose in lateral view. Forewing length about 2.1X width; speculum reaching to R; M about 5.1– 5.8X as long as R, the latter as long as or slightly longer than P; stigma rather small, its posterior margin rounded; with bare area (occasionally with 1 hair) about half the distance between R and apical margin, but bare area effaced by hairs on ventral side; also beneath R with small bare area; basal cell almost bare, with 6– 7 hairs near basal vein. Pecten well developed, about 3/4 length of hind tibia.

Gaster (Fig. 25). Elongated, more or less laterally compressed, length without ovipositor sheaths about 2– 4 X width, from about equal to slightly longer than head and mesosoma combined. Hypopygium reaching about 3/4 length of gaster, ovipositor sheaths about 0.7–0.8X as long as hind tibia.

Male. Differs from female as follows:

Body length. 1.25–2.25 mm.

Color. Metallic color sometimes more visible, especially on head and mesosoma, mainly bluish-green.

Head. Width about 1.8– 2 X length in dorsal view. Posterior ocelli touching eyes, which are very large, height about 1.3X length, the upper 2/3 having larger ommatidiae. Scape and pedicel slender, scape length about 4– 5 X width, pedicel length about 1.5–1.6X width; F1–F3 slightly increasing in size; F4 occasionally more transverse, width up to about 2.7X length, sometimes distinctly smaller than F5, especially in smaller individuals, but not narrower than pedicel; F5 width about 1.2–1.6X length; clava length about 2–2.6X width. Mesosoma length about 1.4–1.5X width, length about 1.4–1.6X height. Forewing length about 2.1–2.4X width; basal cell with 4–11 hairs in its distal part (number of hairs seems to increase with body size); M about 4–5.3X as long as R; stigma larger, its posterior margin rounder; bare area beyond R larger, reaching almost to apical margin of wing. Pecten as in M. penetrans , i.e. very dense and occupying virtual entire hind tibia.

Gaster. Sometimes strongly compressed laterally, length about 2.1–4.6X width, usually slightly to distinctly longer than mesosoma (up to 1.5X, but usually about 1.2X, and in one case slightly shorter than mesosoma).

Material examined. HOLOTYPE (Ψ): JAPAN: ‘ JAPAN: Honshu, Iwate, Mt. Hayachine, 500 m, 21. VI. 1989, M. J. Sharkey, sweep’ ( CNC).

PARATYPES (1 Ψ, 6 ɗ): JAPAN: same information as holotype ( CNC).

Comments. This new species clearly belongs to the same group of species as M. penetrans and M. conjungens . As in many cases, the males are more similar to those of related species than the females, the males probably tending to retain more plesiomorphic characters. In this case, if males are correctly associated with females, they are very close to those of M. penetrans , differing only in small characters given in the key. The females are also close to those of M. noyesi sp. nov., from which they are separated mainly by the length of the ovipositor sheaths.

Distribution. Japan.

Hosts. Unknown.