Keesia dorsellata Mitroiu

Mitroiu, Mircea-Dan, 2011, New Pireninae (Hymenoptera: Pteromalidae) from South-East Asia, Zootaxa 3065, pp. 1-13 : 3-5

Keesia dorsellata Mitroiu , sp. nov.

( Figs 1–3 )

Etymology. Named for the characteristic dorsellum.

Diagnosis. Females of this species can be recognized by the following combination of characters: mesosoma clearly convex; metasoma distinctly longer than mesosoma; metasomal tergites subequal in length; ovipositor sheaths about half length of hind tibia; hypopygium near tip of metasoma.

Description. Female. Body length. 0.9 mm.

Colour. Body brownish-black, without metallic reflections, except on the head, which is slightly bluish; antenna dark brown; legs brown with distal part of tibiae and tarsi pale yellow; eyes pale reddish; mandibles yellow; wings hyaline, venation brown.

Head. Head very slightly wider than high. POL twice as long as OOL. Eye about 1.4× as high as long. Malar space slightly less than 1/3 eye height. Oral fossa 0.45× as long as head width. Antenna with scape distinctly less than eye height and only slightly longer than eye length; pedicel length about 1.5× width; combined length of pedicel and flagellum 0.75× as long as head width. All funicular segments anelliform, without sensilla, their combined length shorter than pedicel length; F1–F3 closely compacted together and progressively increasing in diameter; F4 and F5 larger, not compacted together, F5 larger in diameter than F4; clava about 1.3× as long as combined length of pedicel and funicle, length about 2.3× width.

Mesosoma. In profile moderately arched dorsally, length about 1.4× width and about 1.6× height. Mesoscutum width about 1.9× length. Scutellum about as long as wide. Frenal area abrupt. Median part of dorsellum semicircular, almost horizontal, overlapping for a short length the propodeum, width about 1.6× length and about 1.7× as long as median length of propodeum. Fore wing narrow, about 2.8× as long as wide; surface of wing glabrous, except for marginal fringe which is long on apical margin, and a few hairs along cubital and r-m veins on dorsal surface of wing; M:S:P = 27:4:1; S perpendicular on M, stigma small, oval.

Metasoma. Oval, about 1.3× as long as mesosoma, laterally compressed, length without ovipositor sheaths 2.3× width. Metasomal tergites all about same length, last ones not retracted. Hypopygium close to tip of metasoma. Ovipositor sheaths about half length of hind tibia.

Male. Unknown.

Material examined. Holotype Ƥ: “ INDONESIA: Sula isl. Mangole, near Buya, Mal. trap 16, c 450m, 13.x- 2.xi.1993, C. v. Achterberg, RMNH '93” ( RMNH).

Comments. The unique female of this species is easily separated from K. tripotini by its distinctly convex mesosoma and subequal metasomal tergites. The pecten could not be observed and measured due to the position of the hind leg.

Distribution. Known only from Indonesia (Mangole island, Maluku). Hosts. Unknown.

Figures

FIGURE 1. Keesia dorsellata sp. nov., lower part of head in antero-ventral view.

FIGURE 2. Keesia dorsellata sp. nov., mesosoma in dorsal view (left: photo; right: line drawing).

FIGURE 3. Holotype of Keesia dorsellata sp. nov., lateral habitus.