Stilbops ezoensis, Watanabe, Kyohei & Maeto, Kaoru, 2012

Watanabe, Kyohei & Maeto, Kaoru, 2012, Taxonomic study of the genus Stilbops Förster from Japan (Hymenoptera: Ichneumonidae: Stilbopinae), Zootaxa 3456, pp. 51-81 : 63-65

publication ID	https://doi.org/ 10.5281/zenodo.211080
DOI	https://doi.org/10.5281/zenodo.6178654
persistent identifier	https://treatment.plazi.org/id/8079878D-FFA5-FF9B-4DAD-6B3EFEB17400
treatment provided by	Plazi
scientific name	Stilbops ezoensis
status	sp. nov.

Treatment

Stilbops ezoensis sp. nov.

( Figs. 2 View FIGURE 2 D, 3 D, 4 D, 5 D, 6 D, 7 D, 8 D, 9 D, 10 D, 11 E, F, 12 F, G, 13)

Diagnosis. Anterior tentorial pit small ( Fig. 2 View FIGURE 2 D), its margin not concealed by setae; lower part of gena with concavity in lateral view ( Fig. 3 View FIGURE 3 D); hind tibia 8.7–8.9 times as long as deep in lateral view; Cu-a of fore wing distant from Rs&M by 0.6–0.8 times length of Cu-a; TI 1.2–1.3 (in female) or 1.7 (in male) times as long as wide; TII and TIII without weak round convexities; ovipositor upcurved. Tegula, coxae, hind leg, except for trochantellus, and metasomal tergites almost black.

Description. Female (n=6). Body length 5.0–5.6 (HT: 5.0) mm; length of fore wing 4.0–4.6 (HT: 4.6) mm.

Head 0.5 times as long as wide; clypeus 0.6 times as long as wide, narrowly punctate dorsally, its margin convex to subtruncate in anterior view ( Fig. 2 View FIGURE 2 D); anterior tentorial pit small ( Fig. 2 View FIGURE 2 D), its margin not concealed by setae; face 0.6–0.7 (HT: 0.6) times as long as wide, punctures on below antennal socket transversely to obliquely elongated; frons covered with punctures as central region of face, area above antennal socket transversely striated, and with median longitudinal smooth area; OOL 1.6–1.8 (HT: 1.6) times as long as OD; POL 1.4–1.6 (HT: 1.5) times as long as OD; lower end of occipital carina effaced ( Fig. 4 View FIGURE 4 D); GOI 0.5–0.6 (HT: 0.5); lower part of gena with concavity in lateral view ( Fig. 3 View FIGURE 3 D); malar space 1.0–1.1 (HT: 1.1) times as long as basal width of mandible; basal portion of mandible flat. Antenna with 18 flagellomeres; flagellomere I 1.2–1.3 (HT: 1.3) 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 segments.

Mesosoma ( Figs. 5 View FIGURE 5 D, 6 D, 7 D, 8 D): lower margin of pronotum angulate ( Fig. 5 View FIGURE 5 D); upper end of epomia distant from upper margin of pronotum in lateral view ( Fig. 5 View FIGURE 5 D); lateral area of pronotum punctate except for lower 0.1 smooth area with transverse rugulose ( Fig. 5 View FIGURE 5 D); mesoscutum with weak notaulus on anterior 0.3; smooth area around episternal scrobe rather large; upper end of epicnemial carina reaching lower 0.2–0.3 of pronotum; juxtacoxal carina present; all carinae of propodeum present, anterior part of lateromedian longitudinal carinae adjacent ( Fig. 8 View FIGURE 8 D) or sometimes coalescent; all areas of propodeum punctate ( Fig. 8 View FIGURE 8 D).

Fore wing: Cu-a distant from Rs&M by 0.6–0.8 (HT: 0.8) times length of Cu-a; ICI 0.8–1.0 (HT: 0.8). Hind wing: NI 3.3–6.7 (6.7); one basal hamulus, 5 distal hamuli.

Hind femur 4.8 times as long as deep in lateral view; hind tibia 8.7–8.9 (HT: 8.8) times as long as deep in lateral view; hind tarsomere ratio I; II; III; IV; V = 3.0; 1.2–1.3 (HT. 1.3); 0.9–1.0 (HT: 1.0); 0.5–0.6 (HT: 0.6); 0.9– 1.0 (HT: 1.0).

Metasoma: TI 1.2–1.3 times as long as maximum width, with median dorsal carina on anterior 0.6, without distal depression, and lateral margin weakly convex basally ( Fig. 10 View FIGURE 10 D); TII and TIII without weak round convexities; subgenital plate covered with shallow, fine punctures. Ovipositor upcurved; ovipositor sheath 0.5–0.6 (HT: 0.5) times as long as hind tibia.

Coloration ( Figs. 6 View FIGURE 6 D, 7 D, 9 D, 12 F): body black, except for: apex of mandible brown; antenna dark brown to black with yellow apex of pedicel, apical part of flagellum brown extremely apex; yellow palpi; fore and mid trochanters and trochantelli yellow; fore and mid femora, tibiae and tarsi reddish-brown to brown; brown to dark brown hind trochanter except for base yellow; hind trochantellus yellow; base of hind femur and hind tarsal segments II to IV narrowly yellow; wing veins and stigma dark brown; membranous area of sternites yellow; base of ovipositor sheath tinged whitish-grey; ovipositor and tip of ovipositor sheath brown. Black parts of a few specimens with normally black areas brownish.

Male (n=1). Similar to female: body length 4.9 mm; length of fore wing 4.0 mm. Punctures on frons sparser than female; OOL and POL 1.4 times as long as OD. Antenna with 22 flagellomeres; flagellomere I 1.3 times as long as II; terminal flagellomere 2.0 times as long as preceding one; sensilla placodea present on all flagellomeres. TI 1.7 times as long as maximum width; inner margin of paramere weakly concave apically in ventral view ( Fig. 11 View FIGURE 11 E).

Coloration similar to female ( Fig. 12 View FIGURE 12 G), differing as follows: mandible with yellow area on upper margin; fore and mid coxae and hind trochanter brownish-black; metasomal tergites partly tinged brown.

Type series. Holotype: female [Hokkaido] Mt. Tarumae-san, 12–21. vii. 1998, K. Konishi leg., Malaise trap ( NIAES). Paratypes (5Ƥ 13): [Hokkaido] 1Ƥ, same data as holotype except for collected in 18–21. vii. 1998 ( NIAES); 2Ƥ, same data as holotype except for collected in 21–26. vii. 1998 ( NIAES); 1Ƥ, Tokachi, Kamikawagun, Tomurauchi-spa, 6–8, vii. 1988, K. Konishi leg. ( NIAES). [Honshu] 1Ƥ13, Yamagata Pref., near Mts. Iide, Budosawa, 29–30. vi. 1987, K. Konishi leg. ( NIAES).

Distribution. Japan (Hokkaido and Honshu) ( Fig. 13 View FIGURE 13 ).

Etymology. The specific name is from the “Ezo”, referring to the old name of Hokkaido.

Remarks. This species is closely similar to femoralis Kasprayan and montanus sp. nov. in the normal-sized anterior tentorial pit, the incomplete lower end of occipital carina, the angulate lower margin of the pronotum, the complete propodeal carinae, and the black or blackish-brown tegula and hind leg (except for the trochantellus). This species can be distinguished from them by the black metasomal tergite (more or less largely tinged red in femoralis and montanus ), the 18 segmented flagellomeres (16 flagellomeres in femoralis ), the Cu-a of fore wing distant from Rs&M by more than 0.6 times length of Cu-a (less than 0.5 times length of Cu-a in femoralis ), the hind tibia 8.7–8.9 times as long deep in lateral view (7.8–8.5 times as long as deep in lateral view in montanus ), and the TI 1.2–1.3 (female) or 1.7 (male) times as long as maximum width (1.3–1.4 (female) or 1.4–1.6 (male) times as long as maximum width in montanus ). These three species also closely resemble pronotalis Kasparyan , and can be distinguished from the latter by the black hind femur (red in pronotalis ) and the simple claws (pectinate in pronotalis ).