Idris deergakombus Veenakumari

Kamalanathan, Veenakumari, Mohanraj, Prashanth & Khan, F. R., 2015, ' The adikeshavus-group': A new species group of Idris Foerster (Hymenoptera, Platygastridae) from India, with descriptions of five new species, Deutsche Entomologische Zeitschrift 62 (2), pp. 247-260 : 250-251

Taxon classification Animalia Hymenoptera Platygastridae

Idris deergakombus Veenakumari sp. n. Figures 21-27

Holotype

(Female) (ICAR/NBAIR/P376) INDIA: Arunachal Pradesh, Pasighat, College of Horticulture and Forestry, YPT, 05.v.2014. Paratypes: (ICAR/NBAIR/P377, P378), 2 females, same data as that of holotype; (ICAR/NBAIR/P379), same data as holotype, SN, 03.v.2014; (ICAR/NBAIR/P380), same data as holotype, YPT, 03.v.2014.

Type locality.

INDIA: Arunachal Pradesh, Pasighat.

Description of female.

Color and size (Figs 21, 25). Head, mesosoma, horn on T1 dark brown; metasomal tergites T1-T6 paler than mesosoma; T7 yellowish brown; legs same color as metasoma except paler tarsi; antennae brown except dark brown T2 and clava. Body length=0.989 mm.

Head (Figs 24, 26). FCI=1.25; LCI=1.60; IOS 0.6 × width of head; lower frons smooth, upper frons setigerous punctate; facial striae present reaching lower orbit; gena smooth; POL>OOL in ratio of 17.9:9.9; eyes (L:W = 12.7:9.8) densely setose; length and width of antennomeres A1-A7 in ratio of 12.6:2.7, 4.6:3.0, 1.8:1.8, 1.1:1.7, 1.1:1.8, 1.9:2.5, 13.6:7.8, respectively; radicle 0.27 × length of A1.

Mesosoma (Figs 22, 25). Mesoscutum (L:W = 15.4:23.7) anteriorly reticulate, posteriorly setigerous punctate; mesoscutellum (L:W = 6.0:15.0) with similar sculpture as that of mesoscutum anteriorly, posteriorly almost smooth; notauli (L:W = 4.0:1.2) present; internotular distance 0.43 × width of mesoscutum; lateral pronotal area almost smooth with weak transverse ridges; mesopleuron with eight transverse ridges beneath tegula, femoral depression, mesopleural carina distinct; posterior margin of femoral depression crenulate; metapleuron smooth, with distinct metapleural sulcus and metapleural pit; scutoscutellar sulcus weakly foveate; metascutellum medially narrow and laterally broad; propodeum present as lateral lamellae anterior to horn.

Fore wing (Figs 26, 27) (L:W = 46.3:13.9) transparent with long microtrichia; hind wing (L:W = 45.7:8.4) with sparse short microtrichia; submarginalis: marginalis: stigmalis of fore wing in ratio of 20.7:3.0:6.4 respectively; fore wing marginal cilia 2.1 × width of wing while hind wing marginal cilia 2.94 × width of wing.

Metasoma (Fig. 23) (L:W = 60.3:25.0); anterior margin of T1 crenulate; T1 strongly costate; horn on T1 long, smooth except for few weak costae posteriorly; length of horn 1.41 × length of T1; T1 with two lateral setae; T2 anteriorly smooth beneath which a row of basal foveae present; T2 costate beneath basal foveae, costae not reaching posterior margin; T2, 2 × length of T3; T2 with dense short lateral setae; T3-T7 smooth; T3 with long sublateral setae; T4 and T5 with single sublateral seta; ovipositor extruded 0.25 × length of T7; T7 acuminate; length and width of tergites in ratio of 7.4:17.3, 16.7:15.7, 8.0:24.5, 5.0:23.0, 3.3:17.4, 2.0:13.9, 17.8:10.9, respectively.

Variability (n=5). Female body length=0.929-1.128 mm (m=1.07; SD=0.07); FCI=1.21-1.36 (m=1.3; SD=0.02); LCI=1.58-1.69 (m=1.63; SD=0.03); mesoscutum length=0.141-0.159 mm (m=0.15; SD=0.07); mesoscutum width=0.22-0.239 mm (m=0.227; SD=0.07); mesoscutellum length=0.056-0.073 (m=0.066; SD=0.07); mesoscutellum width=0.135-0.161 mm (m=0.157; SD=0.015); fore wing length=0.407-0.468 mm (m=0.426; SD=0.03); fore wing width=0.124-0.150 mm (m=0.133; SD=0.01); length of fore wing marginal cilia=0.284-0.385 mm (m=0.332; SD=0.03);hind wing length=0.432-0.483 mm (m=0.445; SD=0.04); hind wing width=0.071-0.087 mm (m=0.077, SD=0.04); length of hind wing marginal cilia=0.221-0.251 (m=0.232; SD=0.04); length of T1=0.068-0.084 mm (m=0.073; S. D.=0.09); length of T2=0.148-0.174 mm (m=0.16; SD=0.09); length of T3=0.078-0.092 mm (m=0.085; SD=0.05).

Male.

Unknown

Etymology.

The species is named ' deergakombus ' which means 'long horn’ in Sanskrit.

Diagnosis.

Idris deergakombus differs from Idris brevicornis and Idris lopamudra in having long and denser microtrichia on fore wing while in the latter two the wings are almost smooth; horn on T1 is longer and smooth in Idris deergakombus while it is costate in Idris brevicornis and Idris lopamudra . Idris deergakombus has a long horn while it is short in Idris brevicornis ; In Idris deergakombus T2 2 × length of T3 while in Idris lopamudra T2 1.7 × length of T3.