Ishigakia albitarsa Ito & Maeto, 2016, sp. nov.
Creators: name: Ito, Masato
name: Maeto, Kaoru
Publisher: name: Zenodo
Year: 2016
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Ishigakia
Ishigakia albitarsa

description: Ishigakia albitarsa sp. nov.
(Figs 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 a). Clypeus 0.6 × as long as wide, without punctures. Frons sparsely punctate, with a median longitudinal carina (Fig. 2 a). Malar space 1.5–1.7 × as long as basal width of mandible. Subocular groove present (Fig. 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 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 b). Area basalis, area externa, area dentipara and area superomedia weakly punctate. Area petiolaris polished. Propodeal spiracle elongate (Fig. 2 c). Fore wing: length 9.0 mm. Vein cu-a basad of vein M+cu (Fig. 2 e). Vein 3 rsm opposite to vein 2 m-cu (Fig. 2 e). Hind wing with vein cu-a intercepted at above the middle (Fig. 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 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 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 e).
♂ (n=1). Similar to female except as follows. Body brownish black (Fig. 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 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.
description: Published as part of 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, pp. 174-180 in Zootaxa 4136 (1) on pages 175-177, DOI: 10.11646/zootaxa.4136.1.9, http://zenodo.org/record/266354