Ishigakia albitarsa, Ito, Masato & Maeto, Kaoru, 2016

Ito, Masato & Maeto, Kaoru, 2016, Revision of Ishigakia Uchida (Hymenoptera: Ichneumonidae: Acaenitinae) from Japan, with a new species having a close relative in South Africa, Zootaxa 4136 (1), pp. 174-180 : 175-177

publication ID	https://doi.org/ 10.11646/zootaxa.4136.1.9
publication LSID	lsid:zoobank.org:pub:B5CD8C1A-1E3B-40E3-BF66-DE562B9D41F0
DOI	https://doi.org/10.5281/zenodo.6063790
persistent identifier	https://treatment.plazi.org/id/03E287CD-A555-3A23-FF3B-FD50075DC500
treatment provided by	Plazi
scientific name	Ishigakia albitarsa
status	sp. nov.

Treatment

Ishigakia albitarsa sp. nov.

( Figs 1 View FIGURE 1 a, b, 2a–f)

Holotype: ♀, “Mt. Daisen, Daisen-cho, Tottori Pref., Japan, 15 August 2011, K. Watanabe leg.” ( KPMNH). Paratypes: Japan. 1♀, Mikata-kogen, Niiya, Kami-cho, Hyogo Pref., 26 June – 18 July 2011, S. Fujie (MT) ( OMNH); 1♂, Amagi, Shizuoka Pref., 12 June 1967, T. Kocha (KU).

Description. ♀ (n= 2). Body length: 7.0–8.0 mm.

Head. 0.6 × as long as wide in dorsal view. Face 0.6–0.7 × as long as wide, strongly punctate and weakly convex ( Fig. 2 View FIGURE 2 a). Clypeus 0.6 × as long as wide, without punctures. Frons sparsely punctate, with a median longitudinal carina ( Fig. 2 View FIGURE 2 a). Malar space 1.5–1.7 × as long as basal width of mandible. Subocular groove present ( Fig. 2 View FIGURE 2 a). Gena weakly and sparsely punctate. Occiput smooth. Occipital carina complete. OOL/OD = 1.6–1.7. POL/OD = 1.1–1.3. Antenna with 24 flagellomeres; first flagellomere 1.4 × as long as second flagellomere.

Mesosoma ( Fig. 2 View FIGURE 2 b, c). Propleuron densely punctate. Lateral area of pronotum densely punctate and transversely striated medially. Collar weakly punctate. Mesoscutum strongly punctate, with median longitudinal rugae. Scutellum sparsely punctate, weakly convex in lateral view. Subalar prominence striated. Metapleuron extensively punctate to rugose-punctate. Propodeum strongly carinate, roundly convex in lateral view ( Fig. 2 View FIGURE 2 b). Area basalis, area externa, area dentipara and area superomedia weakly punctate. Area petiolaris polished. Propodeal spiracle elongate ( Fig. 2 View FIGURE 2 c). Fore wing: length 9.0 mm. Vein cu-a basad of vein M+cu ( Fig. 2 View FIGURE 2 e). Vein 3 rsm opposite to vein 2 m-cu ( Fig. 2 View FIGURE 2 e). Hind wing with vein cu-a intercepted at above the middle ( Fig. 2 View FIGURE 2 f). Hind femur 3.0–3.1 × as long as maximum depth in lateral view, without blunt ventral tooth. Hind tibia 8.3–9.3 × as long as maximum depth. First hind tarsomere 2.5–3.0 × as long as second, 2.3–2.7 × as long as inner spur.

Metasoma ( Fig. 2 View FIGURE 2 d). T1 1.8–2.0 × as long as maximum width, 2.5–2.7 × as long as T2. T2 0.5–0.6 × as long as maximum width. Tergite weakly punctate. Ventral swelling of S1 without erect setae. Ovipositor sheath 1.3 × as long as hind tibia.

Coloration ( Fig. 1 View FIGURE 1 a). Body black. Antennal flagellum yellowish brown subapically. Inner margin of eye and 2– 5 hind tarsomeres yellowish white. Clypeus, basal area of mandible, and fore and middle legs brown. Fore wing with two discrete dark markings below the stigma and apically; apical dark mark round, not reaching vein Cu1a ( Fig. 2 View FIGURE 2 e).

♂ (n=1). Similar to female except as follows. Body brownish black ( Fig. 1 View FIGURE 1 b). Clypeus 0.4 × as long as wide. Malar space 1.4 × as long as basal width of mandible. Antenna with 27 flagellomeres; first flagellomere 1.3 × as long as second flagellomere. Hind femur 3.9 × as long as maximum depth in lateral view. Hind tibia 10.0 × as long as maximum depth. Area externa and area dentipara rugose. First hind tarsomere 2.4 × as long as second, 2.8 × as long as inner spur. T1 2.3 × as long as maximum width, 2.0 × as long as T2. T2 0.8 × as long as maximum width. Male terminalia was not observed due to limited number of specimens.

Distribution. Japan (Honshu).

Bionomics. Host unknown.

Remarks. Three species, I. alaica Sheng & Sun, 2010 from mainland China, I. albitarsa sp. nov. Ito & Maeto from Japan, and I. wahlbergii ( Roman, 1910) from South Africa, are distinct from any other species of Ishigakia in the small body size (7–10 mm in length) as well as having two dark markings on fore wing (below the stigma and at the apex, Fig. 2 View FIGURE 2 e). In the remaining Ishigakia , the body length is more than 10 mm and the fore wing at most has an apical marking. This new species most resembles I. alaica from China, but is distinguished from it by the body coloration shown in the key below.