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

description: Torymus hirtipennis Matsuo n. sp.
Figs 2b, 6 a–b, 13a–d, 24f
Etymology. The specific name, hirtipennis, is Latin meaning “hairy wing”, in reference to this characteristic of the fore wing of this species.
Type material. Holotype: ♀ (BLKU), emerged on 23–24 September 2009 from a gall of Schizomyia sasakii on Ilex crenata collected by K. Matsuo on 12 September 2009 from Akagawa, Kokonoe, Oita, Japan. Paratypes: 2 ♀ and 2 ♂, collected by K. Konishi on 25 September 2009 from Hitsujigaoka, Sapporo, Hokkaido, Japan (BLKU)
Description. Female. Body length excluding ovipositor sheath 2.7–3.2 mm. Head green. Scape yellowish brown with apical tip darker; pedicel and flagellomeres dark brown. Mesosoma green. Fore wing hyaline. Fore and mid coxae yellowish brown; hind coxa yellowish brown apically; all femora and tibiae yellowish brown. Lateral part of metasoma with yellowish brown area which extends from base to half of metasoma (Fig. 2b).
Head 2.0–2.1× as wide as long in dorsal view; temple 0.1–0.2× as long as dorsal length of eye; POL 2.0–2.1× OOL; OOL 1.0–1.1× OD. Head 1.2–1.3× as wide as high in frontal view (Fig. 13a); eyes separated by 0.8–1.0× their height; malar space 0.2–0.3× height of eye; mouth 2.5–2.7× malar space; clypeus with apical margin produced, trun- cate or slightly incised medially. Antenna weakly clavate (Fig. 6a); scape 0.6–0.7× as long as height of eye, reaching anterior ocellus; combined length of pedicel and flagellum 1.3–1.4× width of head; pedicel 1.6–1.8× as long as wide; anellus quadrate; F1 1.5–1.7× as long as wide, as long as pedicel; F2 1.3–1.5× longer than wide; F3–F5 1.2–1.3× as long as wide; F6 1.0–1.2× as long as wide; F7 quadrate; each funicular segment bearing longitudinal sensilla arranged in irregular one or two rows; C3 with a small tuft of micropilosity beneath.
Mesosoma 1.8–2.0× as long as wide; mesoscutum (Fig. 13b) with small piliferous punctures; sculpture on mesoscutum in anterior half transversely reticulate; notaulus shallow; scutellum (Fig. 13c) 1.3–1.5× as long as wide, sculptured as posterior part of mesoscutum; dorsellum without median carina; propodeum (Fig. 13d) with superficial reticulation, smoother medially; lower mesepimeron 1.5–1.6× as long as wide. Fore wing 2.5–2.6× as long as wide (Fig. 24f); costal cell 8.8–11.0× as long as wide, on upper surface with a setal row which becomes double apically, on lower surface with a setal row and scattered setae; basal cell closed, hairy; cubital setal line present; basal setal line present; speculum very small, closed below; relative lengths of marginal vein: postmarginal vein: stigmal vein=10.3: 2.2: 1.0. Hind coxa elongate, 2.7–2.9× as long as wide, with dorsal carina extending 0.3 length; dorsal surface of hind coxa with setae in basal half; hind femur 5.3–5.7× as long as wide; hind tibia with longer spur 1.1–1.3× as long as width of hind tibia, 0.3–0.4× length of basitarsus; shorter spur 0.7–0.8× length of longer spur.
Metasoma as long as mesosoma plus head; posterior margin of metasomal tergum five incised; tip of hypopygium situated at 0.3 length of metasoma; ovipositor sheath 1.4–1.5× as long as body, 5.2–5.9× as long as hind tibia.
Male. Differs from female as follows. Body length 2.3 mm. Antenna stouter than that of female (Fig. 6b); scape darker, anellus transverse, 2.5× as wide as long; F1–F2 1.3× as long as wide; F3–F7 quadrate; longitudinal sensilla on each segment arranged in one row. Lower mesepimeron 1.3× as long as wide. Relative lengths of marginal vein: postmarginal vein: stigmal vein=8.5: 2.4: 1.0. Hind coxa 2.4× as long as wide; hind femur 4.6× as long as wide; hind tibia with longer spur 0.6× length of basitarsus. Metasoma with coppery tint.
Distribution. Japan (Hokkaido, Kyushu).
Host information. Torymus hirtipennis is an ectoparasitoid of Schizomyia sasakii (Monzen) (Diptera: Ceci- domyiidae) that induces galls on Ilex crenata Thunb. (Aquifoliaceae) (gall photo: fig. 26h, C–373 of Yukawa & Masuda 1996).
Remarks. Females of T. hirtipennis are similar to T. hylesini Graham, a European species (Graham & Gijswijt 1998), by having the following shared features: malar space 0.2–0.3× height of eye; mouth 2.5–2.7× malar space; anellus of antenna quadrate; F7 quadrate; mesoscutum with small piliferous punctures; sculpture on mesoscutum in anterior half transversely reticulate; notaulus shallow; scutellum 1.3–1.5× as long as wide, sculptured as posterior part of mesoscutum; dorsellum without median carina; propodeum with superficial reticulation, smoother medially; posterior margin of metasomal tergum five incised; ovipositor sheath 1.4–1.5× as long as body. However, females of T. hirtipennis can be distinguished from T. hylesini by having the following features: POL 2.0–2.1× OOL (1.7–1.8× OOL in T. hylesini); each funicular segment of antenna bearing longitudinal sensilla arranged in irregular one or two rows (two rows in T. hylesini); hind coxa 2.7–2.9× as long as wide (about 2× as long as wide in T. hylesini); dorsal surface of hind coxa with setae in basal half (without setae in basal half in T. hylesini); hind femur 5.3–5.7× as long as wide (about 4× as long as wide in T. hylesini); basal cell of fore wing closed, hairy (widely opened below, with a setal row below submarginal vein in T. hylesini); speculum very small, closed below (opened below in T. hylesini).
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 419-421, DOI: 10.11646/zootaxa.4758.3.1, http://zenodo.org/record/3734584