Celebarches sabahensis, Riedel, 2023

Riedel, Matthias, 2023, Contribution to the knowledge of the Ichneumoninae (Hymenoptera, Ichneumonidae) from Maritime Southeast Asia, Zootaxa 5363 (1), pp. 1-94 : 37

Celebarches sabahensis nov. sp.

( Figs 14A–C )

Holotype. (♀) Malaysia: SE Sabah, nr. Danum Valley Field C, c 150 m, Mal. trap 6, 15–19.iii.1987, C. van Achterberg, RMNH´87 (Leiden).

Description. ♀. Body length 10.5 mm.

Head. Flagellum with 37 flagellomeres, very long and slender; 1 st flagellomere 3.5 × longer than wide; all flagellomeres much longer than wide. Temple rather long, shortly parallel behind eye, moderately and roundly narrowed apically (fig. 14B). OED 1.7 × and OOD 1.4 × ocellar diameter. Frons smooth, with some lateral punctures. Face rather densely punctate. Clypeus large, punctate, almost flat; apical margin blunt, slightly bulging medially (fig. 14A). Mandible sickle-shaped, ventral tooth absent. Malar space 0.8 × as long as width of mandibular base. Gena densely punctate. Genal carina reaching mandibular base.

Mesosoma . Covered with short setae. Side of pronotum almost smooth, with some coarse striae ventrally. Notaulus strongly impressed in frontal 0.3 of mesoscutum, with some transverse ribs. Mesoscutum densely punctate, ± dull. Mesopleuron rugose-punctate, speculum large, smooth and shining. Metapleuron densely rugose-punctate; juxtacoxal carina present. Scutellum pyramidal, slightly longer than wide, coarsely rugose, lateral carina complete. Propodeum completely carinated, but costula obsolete laterally, with rather short tooth-like apophysis (about as long as wide at base); spiracle slit-shaped. Area basalis present, distinctly impressed. Area superomedia sickle-shaped, 1.6 × wider than long; anterior transverse carina reaching widely behind its middle. Hind coxa with fine dense punctures, without scopa. Hind femur 4.1 × longer than wide. Claws simple. Areolet pointed frontally. Vein 1cu-a antefurcal by 2.0 × its width.

Metasoma (fig. 14C). Strongly amblypygous, slender. Postpetiole moderately widened, without latero-median carina; median field slightly elevated, with fine striae and some punctures; lateral field with dense punctures. 2 nd tergite 1.3 × wider than long. Gastrocoelus slightly impressed. Thyridium transverse, 0.7 × as wide as the interval between thyridia. 2 nd to 4 th tergites densely rugose-punctate, dull; following tergites with superficial punctures, ± shining. Ovipositor sheath slightly extending behind metasomal apex.

Colour. Black with ivory coloration. Ivory are dorsal stripes on flagellomeres 6–18, palps, base of mandible, clypeus except black margins, face except black M-shaped central spot (fig. 14A), gena, dorsally widened stripe of frontal orbit, collar and upper margin of pronotum, tegula, subtegular ridge, scutellum and postscutellum, upper division of metapleuron, spot of apical half of area dentipara and entire area posteroexterna of propodeum, apical bands of all tergites (fig. 14C), 2 nd to 5 th sternites except brown lateral spots, apical half of hypopygium and ovipositor sheath. Fore and mid coxae and trochanters and hind tarsus ivory; fore and mid legs brownish, femora and tibiae with frontal yellowish stripes; hind coxa and trochanter black; hind femur and tibia reddish, basally and apically blackish. Wings hyaline; pterostigma black.

♂ unknown.

Distribution. Only known from Borneo.

Figures

FIGURE 14. Celebarches sabahensis n. sp. HT ♀. A face, frontal view, B head, dorsal view, C metasoma, dorsal view.