Idris badius Johnson & Chen

Johnson, Norman F., Chen, Huayan & Huber, Bernhard A., 2018, New species of Idris Foerster (Hymenoptera, Platygastroidea) from southeast Asia, parasitoids of the eggs of pholcid spiders (Araneae, Pholcidae), ZooKeys 811, pp. 65-80 : 65

Idris badius Johnson & Chen sp. n. Figures 2, 6, 10

Description.

Body length: 0.81 mm. Head color: brown. Mesosoma color: brown. Metasoma color: brown.

Head shape in frontal view: ovoid, distinctly wider than high. Head width/mesosomal width: 1.34-1.44. Sculpture of upper frons, vertex: finely coriaceous reticulate. Position of lateral ocellus: contiguous with inner orbit of compound eye. Central keel of frons: present. Length of central keel of frons: extending dorsally half distance to median ocellus. Speculum: present. Striae on lower frons: absent. Setation of compound eyes: eyes distinctly setose.

Size of A3: subequal in length, width to A2. Shape of A3: length greater than width.

Length/width mesoscutum: 0.74-0.83. Sculpture of mesoscutum: finely reticulate, setal bases pustulate. Notauli: absent. Sculpture of mesoscutellum: finely reticulate, setal bases pustulate. Sculpture of metascutellum: smooth. Propodeal armature: lateral propodeal area produced dorsomedially into small tooth.

Wing development: fully developed, macropterous. Fore wing patterning: fore wing hyaline throughout. Marginal fringe of fore wing: present, short. Length of bristles on submarginal vein: short, barely reaching beyond costal margin of wing. Basal vein: well-defined, straight, lightly pigmented. Length of stigmal vein: elongate, extending nearly to middle of fore wing. Length of postmarginal vein: extremely short, subequal in length to marginal vein.

Metasoma length/body length: 0.47-0.48. Sculpture of T1: longitudinally costate. Sculpture of T2: longitudinally costate in medial third, finely reticulate along lateral margin, elsewhere smooth. Length T3/length T2: 2.21. Sculpture of T4-T5: finely reticulate basally, smooth apically. Setation of T3: lateral thirds of tergite moderately setose through, median third nearly glabrous, with sparse apical transverse band of setae.

Diagnosis.

This species runs to I. nautalis Kozlov & Lê in the keys of Kozlov and Lê (1987) and Lê (2000), but differs in the absence of longitudinal striae on T3. It is morphologically indistinguishable from the specimens of sample Mal305 collected at the same time and place, but reared from the eggs of Tissahamia gombak . The COI sequences, however, have only 86.5% identity, and this must be used to establish their identity.

Host.

Eggs of Nipisa phyllicola (Deeleman-Reinhold) (ZFMK, Mal 276) (Fig. 14), Panjange hamiguitan Huber (ZFMK, PSt1226 = Ar 13012) ( Araneae : Pholcidae ).

Etymology.

The specific epithet badius refers the rich brown color of the body and is intended as an adjective.

Material examined.

Holotypefemale: MALAYSIA: Perak, Gunung Liang, forest along river, 250 m a.s.l., 3°47.7'N 101°32.0'E, 22.ii.2015, B. A. Huber, A.R.M. Ghazali & K. A. Braima, ex: egg of Nipisa phyllicola (Deeleman-Reinhold), OSUC270822. Paratypes: MALAYSIA: 3 females, 1 male with same data as holotype, OSUC270823, 420837-420838, 627622. PHILIPPINES: Mindanao, Davao Oriental, 580 m a.s.l., 6.6805N, 126.1591E, site 3, Mount Hamiguitan Wildlife Sanctuary (access Governor Generoso), 13.ii.2015, M. A. Responte, ex egg of Panjange hamiguitan Huber (1 female, OSUC627625).