Celebarches nigritor, Riedel, 2023

Riedel, Matthias, 2023, Contribution to the knowledge of the Ichneumoninae (Hymenoptera, Ichneumonidae) from Maritime Southeast Asia, Zootaxa 5363 (1), pp. 1-94 : 34-35

Celebarches nigritor nov. sp.

( Figs 13A–D )

Holotype. (♀) Malaysia: SW Sabah, nr. Long Pa Sia (East), 25.xi.–7.xii.1987, c. 1000 m, Mal. trap 5, C. van Achterberg, RMNH´87 (Leiden).

Etymology. The species name refers to the mainly black coloration.

Description. ♀. Body length 13 mm.

Head. Flagellum with 40 flagellomeres, very long and slender; 1 st flagellomere 4.6 × longer than wide; all flagellomeres much longer than wide. Head covered with dense grey setae. Temple rather long, moderately and roundly narrowed behind eye (fig. 13B). OED 1.4 × and OOD 0.3 × ocellar diameter. Frons rather densely punctate, ± dull. Face punctate, centrally with some longitudinal striae. Clypeus large, punctate, almost flat, but ± impressed around anterior tentorial grooves; apical margin sharp, slightly bulging medially (fig. 13A). Mandible sickle-shaped, ventral tooth absent. Malar space 0.5 × as long as width of mandibular base. Gena densely punctate. Genal carina reaching mandibular base.

Mesosoma . Covered with dense setae. Side of pronotum punctate dorsally, with some coarse striae at posterior margin. Notaulus strongly impressed in frontal 1/4 of mesoscutum, with some transverse ribs. Mesoscutum densely punctate, ± dull. Sternaulus strongly impressed in frontal half of mesopleuron. Mesopleuron with coarse longitudinal striae in dorsal 2/3, coarsely rugose ventrally, speculum finely punctate. Metapleuron densely rugose-punctate; juxtacoxal carina present. Scutellum strongly elevated (as in Eccoptosage Kriechbaumer ), about as long as wide, densely rugose-punctate, lateral carina strong and slightly lamelliform widened apically. Propodeum completely carinated, with strong tooth-like apophysis (fig. 13C); spiracle slit-shaped. Area basalis wider than long. Area superomedia hexagonal, as long as wide; costula reaching its middle. Hind coxa with fine dense punctures, without scopa. Legs slender. Hind femur 5.1 × longer than wide. Claws simple.Areolet almost quadrangular, frontal distance between veins 2rs-m and 3rs-m 1.0 × their diameter. Vein 1cu-a slightly antefurcal by 1 × its width.

Metasoma. Strongly amblypygous, slender. Postpetiole slightly widened, without latero-median carina; median field not separated, with sparse fine punctures; lateral field with larger dense punctures (fig. 13D). 2 nd tergite about as long as wide. Gastrocoelus not impressed. Thyridium very small, 0.2 × as wide as the interval between thyridia (fig. 13D). 2 nd and 3 rd tergites finely and densely rugose-punctate, dull; following tergites with superficial punctures, ± shining. Ovipositor sheath slightly extending behind metasomal apex.

Colour. Black with weak metallic shine. Ivory are dorsal stripes on flagellomeres 9–12/13, palps, tips of apophysis, small apical spot of 5 th tergite and wide apical bands of 6 th and 7 th tergites, apical 0.2 of hind metatarsus and all following hind tarsomeres. Frontal orbit with small reddish-yellow spot. Mandible reddish medially. Legs black; fore and mid legs ± brownish frontally. Wings slightly infuscate; pterostigma black.

♂ unknown.

Distribution. Only known from Borneo.

Figures

FIGURE 13. Celebarches nigritor n. sp. HT ♀. A face, frontal view, B head, dorsal view, C propodeum, dorsal view, D basal tergites, dorsal view.