Torymus wanggyui Matsuo 2020, n. sp.
Creators: name: Matsuo, Kazunori
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Torymidae
Torymus
Torymus wanggyui

description: Torymus wanggyui Matsuo n. sp.
Figs 4d, 7 g–h, 23a–d, 25f
Etymology. The specific name honors Dr. Wanggyu Kim who first reared this species and studied its host gall midge.
Type material. Holotype: ♀ (BLKU), emerged on 23 April 2012 from a gall of Macrodiplosis selenis on Quercus serrata collected by W. Kim on 4 November 2011 from Mitsusawa, Ogori, Fukuoka, Japan. Paratypes: 5 ♀, same data as the holotype (BLKU); 1 ♀ and 3 ♂, emerged on 24 March 2012 from galls of Macrodiplosis selenis on Quercus serrata collected by N. Gyotoku from Mitsusawa, Ogori, Fukuoka, Japan (BLKU); 3 ♂, emerged on 17 April 2012 from galls of Macrodiplosis selenis on Quercus serrata collected by W. Kim on 4 November 2011 from Mitsusawa, Ogori, Fukuoka, Japan (BLKU).
Description. Female. Body length excluding ovipositor sheath 2.3–2.5 mm. Head bluish green. Scape yellowish brown but darker apically; pedicel and flagellum brown. Mesosoma bluish green. Fore wing hyaline. Fore and mid coxae brownish yellow sometimes bluish green; hind coxa bluish green. All femora and tibiae brownish yellow. Metasoma bluish green (Fig. 4d).
Head 1.9–2.1× as wide as long in dorsal view; temple 0.2× as long as dorsal length of eye; POL 2.6–2.7× OOL; OOL 0.8–0.9× OD. Head 1.1–1.2× as wide as high in frontal view (Fig. 23a); eyes separated by 0.9–1.0× their height; malar space 0.3–0.4× height of eye; mouth 2.1–2.2× malar space; clypeus with apical margin produced, truncate medially. Antenna clavate (Fig. 7g); scape 0.6–0.7× as long as height of eye, not reaching anterior ocellus; combined length of pedicel and flagellum 1.3–1.4× width of head; pedicel 1.8–2.0× as long as wide; anellus 1.3–1.5× as wide as long; F1 1.2–1.5× as long as wide, as long as pedicel; F2 1.2× as long as wide; F3–F5 1.0–1.1× as long as wide; F6–F7 0.9–1.0× as long as wide; each funicular segment bearing longitudinal sensilla arranged in irregular one or two rows; a stripe of micropilosity extends C2 and C3.
Mesosoma 1.8–2.0× as long as wide; mesoscutum (Fig. 23b) with small piliferous punctures; sculpture on mesoscutum in anterior half transversely reticulate; notaulus shallow; scutellum (Fig. 23c) 1.2–1.4× as long as wide, sculptured as mesoscutum; dorsellum with a median carina; propodeum (Fig. 23d) with superficial striae; lower mesepimeron 1.0–1.2× as long as wide. Fore wing (Fig. 25f) 2.5–2.7× as long as wide; costal cell 9.0–10.0× as long as wide, on upper surface with a setal row in distal half, on lower surface with a setal row which is broken medially and scattered setae distally; basal cell widely opened below, bare; cubital setal line with a few setae; basal setal line present; speculum widely opened below; relative lengths of marginal vein: postmarginal vein: stigmal vein=6.9: 1.5: 1.0. Hind coxa 2.0–2.2× as long as wide, with dorsal carina basally; dorsal surface of hind coxa bare in basal half; hind femur 4.3–4.7× as long as wide; hind tibia with longer spur 1.0–1.2× as long as width of hind tibia, 0.4–0.5× length of basitarsus; shorter spur 0.6–0.8× length of longer spur.
Metasoma as long as mesosoma; posterior margin of metasomal tergum five incised; tip of hypopygium situated at 0.6 length of metasoma; ovipositor sheath as long as 2/3 mesosoma, 1.0–1.1× as long as hind tibia.
Male. Differs from female as follows: Antenna stouter than that of female (Fig. 7h); scape bluish green; anellus transverse, twice as wide as long; Relative lengths of marginal vein: postmarginal vein: stigmal vein=5.5: 1.5: 1.0. Hind femur bluish green medially. Metasoma with coppery tint; posterior margin of metasomal tergum five entire.
Distribution. Japan (Kyushu).
Host information. Torymus wanggyui is an ectoparasitoid of Macrodiplosis selenis Kim and Yukawa (Diptera: Cecidomyiidae) that induces leaf galls on Quercus serrata Murray (Fagaceae) (gall photo: fig. 27h).
Remarks. Females of T. wanggyui are similar to T. chrysocephalus Boheman, a European species (Graham & Gijswijt 1998), because of the following shared features: antenna clavate; a stripe of micropilosity extends length of C2 and C3. However, females of T. wanggyui can be distinguished from T. chrysocephalus by having the following features: ovipositor sheath shorter than metasoma (as long as metasoma in T. chrysocephalus); eyes without distinct setae (with distinct setae in T. chrysocephalus); POL 2.6–2.7× OOL (POL 1.2–1.4 OOL in T. chrysocephalus); OOL 0.8–0.9× OD (OOL 1.5–2.0 OD in T. chrysocephalus).
description: Published as part of Matsuo, Kazunori, 2020, A revision of Japanese Torymus Dalman (Hymenoptera: Torymidae), pp. 401-441 in Zootaxa 4758 (3) on pages 434-439, DOI: 10.11646/zootaxa.4758.3.1, http://zenodo.org/record/3734584