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

description: Torymus sawadai Matsuo n. sp.
Figs 4b, 7 e–f, 21a–d, 25e
Etymology. The specific name honors Mr. Souichiro Sawada who first reared this species.
Type material. Holotype: ♀ (BLKU), emerged on 23 July 2009 from a gall of Asphondylia sphaera on Weigela hortensis collected by S. Sawada on 12 July 2009 from Oikomi, Kyouwa, Hokkaido, Japan. Paratypes: 1 ♂, emerged on 20 July 2009 from a gall of Asphondylia sphaera on Weigela hortensis collected by S. Sawada on 12 July 2009 from Oikomi, Kyouwa, Hokkaido (BLKU); 1 ♀, emerged on 27 July 2009 from a gall of Asphondylia sphaera on Weigela hortensis collected by S. Sawada on 12 July 2009 from Oikomi, Kyouwa, Hokkaido (BLKU).
Description. Female. Body length excluding ovipositor sheath 3.2–3.5 mm. Head bluish green. Scape yellowish brown but darker apically; pedicel and flagellum black. Mesosoma bluish green. Fore wing hyaline. All coxae and hind femur concolorous with mesosoma; fore femur and mid femur yellowish brown; fore tibia and mid tibia yellowish brown; hind tibia brown. Metasoma bluish green with bluish tint (Fig. 4b).
Head 2.1–2.2× as wide as long in dorsal view; temple 0.2× as long as dorsal length of eye; POL 2.7–2.8× OOL; OOL 0.9× OD. Head 1.2–1.3× as wide as high in frontal view (Fig. 21a); eyes separated by 0.8–0.9× their height; malar space 0.2–0.3× height of eye; mouth 2.3–2.5× malar space; clypeus with apical margin produced, truncate medially. Antenna stout (Fig. 7e); scape 0.5–0.6× as long as height of eye, not reaching anterior ocellus; combined length of pedicel and flagellum 1.0–1.1× width of head; pedicel 1.4–1.5× as long as wide; anellus 1.1–1.3× as wide as long; F1 quadrate, shorter than pedicel; F2 quadrate; F3–F5 0.7–0.8× as long as wide; F6–F7 0.6–0.7× as long as wide; each funicular segment bearing longitudinal sensilla arranged in two rows; C3 with a small tuft of micropilosity beneath.
Mesosoma 1.5–1.6× as long as wide; mesoscutum (Fig. 21b) with small piliferous punctures; sculpture on mesoscutum in anterior half transversely reticulate; notaulus shallow; scutellum (Fig. 21c) 1.2–1.3× as long as wide, sculptured as posterior part of mesoscutum; dorsellum with a median carina; propodeum (Fig. 21d) with superficial reticulation, smoother medially; lower mesepimeron 1.3× as long as wide. Fore wing (Fig. 25e) 2.3–2.4× as long as wide; costal cell 8.3–8.5× as long as wide, on upper surface with a complete setal row, on lower surface with a complete setal row and scattered setae; basal cell closed, with a few setae below submarginal vein; cubital setal line present; basal setal line present; speculum closed below; relative lengths of marginal vein: postmarginal vein: stigmal vein=9.7: 3.2: 1.0. Hind coxa stout, 1.7× as long as wide, with dorsal carina basally; dorsal surface of hind coxa with a few short setae in basal half; hind femur 3.6–3.8× as long as wide; hind tibia with longer spur 1.6–1.8× as long as width of hind tibia, 0.5× length of basitarsus; shorter spur 0.6–0.7× length of longer spur.
Metasoma as long as mesosoma; posterior margin of metasomal tergum five incised; tip of hypopygium situated at 0.8 length of metasoma; ovipositor sheath slightly shorter than mesosoma, 1.5× as long as hind tibia.
Male. Differs from female as follows. Body length 3.0 mm. Antenna stouter than that of female (Fig. 7f); scape bluish green; pedicel 1.2× as long as wide; anellus transverse, 2.7 as wide as long; F1 0.7× as long as wide; F2–F7 0.6× as long as wide; longitudinal sensilla on each funicular segment arranged in one row. Relative lengths of marginal vein: postmarginal vein: stigmal vein=6.4: 2.2: 1.0. Mid femur and hind tibia darkened medially. Metasoma with coppery tint; posterior margin of metasomal tergum five entire.
Distribution. Japan (Hokkaido).
Host information. Torymus sawadai is an ectoparasitoid of Asphondylia sphaera Monzen (Diptera: Cecidomyiidae) that induces galls on Weigela hortensis (Siebold et Zucc.) K. Koch (Caprifoliaceae) (gall photo: fig. 27g, D–061 of Yukawa & Masuda 1996).
Remarks. Females of T. sawadai is similar to T. centor Graham and Gijswijt, which is recorded from United Kingdom (Graham & Gijswijt 1998), by having the following shared features: clypeus with apical margin, narrowly truncate; antennal scape not reaching anterior ocellus; temple about 0.2× as long as dorsal length of eye; ovipositor sheath slightly shorter than metasoma; hind tibia with longer spur 1.6–1.8× as long as width of hind tibia, about 0.5× length of basitarsus; costal cell of fore wing on upper surface with a complete setal row; basal cell closed. However, females of T. sawadai can be distinguished from T. centor by having the following features: dorsellum with a median carina (without a median carina in T. centor); dorsal surface of hind coxa with a few setae (fairly thickly setose in basal half in T. centor); pedicel stouter, 1.4–1.5× as long as wide (twice as long as wide in T. centor); F3–F6 transverse (quadrate in T. centor); each segment bearing longitudinal sensilla arranged in two rows (one row in T. centor); mouth 2.3–2.5× malar space (1.9× malar space in T. centor); POL 2.7–2.8× OOL (2.2× OOL in T. centor); OOL 0.9× OD (1.3× OD in T. centor).
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 432-433, DOI: 10.11646/zootaxa.4758.3.1, http://zenodo.org/record/3734584