Stilbops auster Watanabe & Maeto, 2012, sp. nov.
Creators: name: Watanabe, Kyohei
name: Maeto, Kaoru
Publisher: name: Zenodo
Year: 2012
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Stilbops
Stilbops auster

description: Stilbops auster sp. nov.
(Figs. 2 A, K, 3 A, 4 A, 5 A, 6 A, 7 A, 8 A, 9 A, 10 A, 12 A, 13, 14 D)
Diagnosis. Anterior tentorial pit small (Fig. 2 A), its margin not concealed by setae; lower end of occipital carina effaced (Fig. 4 A); lower part of gena without concavity in lateral view (Fig. 3 A); lower margin of pronotum angulate (Fig. 5 A); pronotum without large smooth area on lateral area (Fig. 5 A); hind femur short, 4.3 times as long as deep in lateral view; lateral margin of T1 straight basally (Fig. 10 A); metasomal tergites, hind femur, tibia and tarsus almost black (Fig. 12 A); tegula yellow (Fig. 6 A).
Description. Female (n=2). Body length 4.5–5.0 (HT: 5.0) mm; length of fore wing 3.6–4.0 (HT: 4.0) mm.
Head 0.5 times as long as wide; clypeus 0.6 times as long as wide, narrowly punctate dorsally, its margin convex in anterior view (Fig. 2 A); anterior tentorial pit small (Fig. 2 A), its margin clearly observed; face 0.6 times as long as wide, punctures on lower antennal socket elongate longitudinally; frons covered with punctures as face, lower half of it transversely striated by coalescent punctures (Fig. 2 K); OOL 1.4–1.5 (HT: 1.5) times as long as OD; POL 1.5 times as long as OD; lower end of occipital carina effaced (Fig. 4 A); GOI 0.4; lower part of gena without concavity in lateral view (Fig. 3 A); malar space 1.0 times as long as basal width of mandible; basal portion of mandible flat. Antenna with 18 flagellomeres; flagellomere I 1.2 times as long as II and terminal flagellomere 2.5 times as long as preceding one; sensilla placodea present on flagellomere III and following all flagellomeres.
Mesosoma (Figs. 5 A, 6 A, 7 A, 8 A): lower margin of pronotum angulate (Fig. 5 A); upper end of epomia closely located with upper margin of pronotum in lateral view (Fig. 5 A); lateral area of pronotum entirely punctate, without smooth area (Fig. 5 A); mesoscutum with weak notaulus on anterior 0.3; smooth area around episternal scrobe rather large; upper end of epicnemial carina reaching lower 0.3 of pronotum; juxtacoxal carina distinct; all carinae of propodeum present, lateral section of anterior transverse carina and lateromedian longitudinal carina along area dentipara weak, anterior part of lateromedian longitudinal carinae coalescent (Fig. 8 A); all areas of propodeum punctate (Fig. 8 A), punctures on areas superomedia and postero shallower.
Fore wing: Cu-a distant from Rs&M by 0.8–1.0 times length of Cu-a (HT: 1.0); ICI 0.8. Hind wing: NI 5.0; one basal hamulus, 5 or 6 (HT: 6) distal hamuli.
Legs: hind femur 4.3 times as long as deep in lateral view; hind tibia 7.2 times as long as deep in lateral view; hind tarsomere ratio I; II; III; IV; V = 3.0; 1.4; 1.0; 0.6; 1.0.
Metasoma: TI 1.2 times as long as maximum width, with distinct median dorsal carina on anterior 0.3, without distal depression, and lateral margin straight basally (Fig. 10 A); TII and TIII with pair of slight round convexities; lower half of subgenital plate weakly punctate. Ovipositor weakly upcurved in posterior half; ovipositor sheath 0.5 times as long as hind tibia.
Coloration (Figs. 6 A, 7 A, 9 A, 12 A): black, except for: antenna with pedicel and apical part of flagellum brown, scape and remainder of flagellum blackish-brown; yellow palpi; yellow tegula; apical part of fore coxa apex of mid and hind coxae yellow; trochanters and trochantelli yellow; fore and mid femora, tibiae and tarsi brown; apical part of hind femur blackish-brown; hind tibia and tarsus blackish-brown; stigma, wing veins blackishbrown; metasomal sternites yellow except for brown sclerotized areas; brown apex of ovipositor sheath; blackishbrown ovipositor.
Male. Unknown.
Type series. Holotype: female [Ryukyu Isls.] Kagoshima Pref., Tokunoshima Isl., Tokunoshima town, Kedoku, about 140 m, N27°48’51" E128°55’11", 20. v. 2008, K. Watanabe leg. (NIAES). Paratype: JAPAN: [Ryukyu Isls.] 1Ƥ, Kagoshima Pref., Tokunoshima Isl., Amagi town, Mt. Yamatogusuku-yama, 180–200 m, N27°50’22" E128°56’47", 20. v. 2008, K. Watanabe leg. (TUA).
Distribution. Japan (Ryukyus: Tokunoshima Island) (Fig. 13).
Etymology. The specific name is from the Latin “ auster ” (south wind), referring to the warm habitat in Tokunoshima Island.
Remarks. This species closely resembles kunashiricus Kasparyan in the lateral margin of T1 straight basally, the normal-sized anterior tentorial pit and the relatively dense body punctuation. It can be distinguished from the latter by the simple gena (kunashiricus with genal concavity) and the black metasoma (kunashiricus at least partly red). This species was collected in the shade of wet natural forests (Fig. 14 D).
description: Published as part of Watanabe, Kyohei & Maeto, Kaoru, 2012, Taxonomic study of the genus Stilbops Förster from Japan (Hymenoptera: Ichneumonidae: Stilbopinae), pp. 51-81 in Zootaxa 3456 on pages 55-57, DOI: 10.5281/zenodo.211080