Torymus brevicaudatus Matsuo, 2020

Matsuo, Kazunori, 2020, A revision of Japanese Torymus Dalman (Hymenoptera: Torymidae), Zootaxa 4758 (3), pp. 401-441 : 415-416

Torymus brevicaudatus Matsuo n. sp.

Figs 2a , 5h , 12 a–d, 24e

Etymology. The specific name, brevicaudatus , is Latin meaning “short tail”, in reference to the length of the ovipositor sheath of females.

Type material. Holotype: ♀ ( BLKU), collected by T. Mita on 4 June 2007 from Kurume , Fukuoka, Japan . Paratypes: 3 ♀, same data as the holotype ( BLKU) .

Description. Female. Body length excluding ovipositor sheath 2.6–2.9 mm. Head green. Scape yellowish brown but darker apically; pedicel dark brown; all flagellomeres yellowish brown ventrally. Mesosoma green. Fore wing hyaline. Fore coxa yellowish brown in apical half; mid and hind coxae concolorous with mesosoma; all femora and tibiae yellowish brown. Metasoma green with bluish tint ( Fig. 2a ).

Head 2.0–2.1× as wide as long in dorsal view; temple 0.2× as long as dorsal length of eye; POL 2.3–2.5× OOL; OOL 1.1× OD. Head 1.2–1.3× as wide as high in frontal view ( Fig. 12a ); eyes separated by their height; malar space 0.3× height of eye; mouth 2.1–2.3× malar space; clypeus with apical margin produced, truncate medially. Antenna clavate ( Fig. 5h ); scape 0.6× as long as height of eye, not reaching anterior ocellus; combined length of pedicel and flagellum 1.1–1.2× width of head; pedicel 1.5–1.7× as long as wide; anellus twice as wide as long; F1 quadrate, shorter than pedicel; F2 quadrate; F3–F4 0.9–1.0× as long as wide; F5 0.8–0.9× as long as wide; F6 0.7–0.8× as long as wide; F7 0.6–0.7× as long as wide; each funicular segment bearing longitudinal sensilla arranged in one row; C3 with a small tuft of micropilosity beneath.

Mesosoma 1.7–1.9× as long as wide; mesoscutum ( Fig. 12b ) with small piliferous punctures; sculpture on mesoscutum in anterior half transversely reticulate; notaulus shallow; scutellum ( Fig. 12c ) 1.1–1.2× as long as wide, sculptured as posterior part of mesoscutum; dorsellum without median carina; propodeum ( Fig. 12d ) wholly reticulate; lower mesepimeron 1.2–1.3× as long as wide. Fore wing 2.4–2.6× as long as wide ( Fig. 24e ); costal cell 10.0–11.5× as long as wide, on upper surface with a setal row in distal half, on lower surface with a complete setal row and scattered setae; basal cell closed, with setae below submarginal vein; cubital setal line present; basal setal line present; speculum opened below; relative lengths of marginal vein: postmarginal vein: stigmal vein=9.1: 2.1: 1.0. Hind coxa stout, 1.5–1.7× as long as wide, with dorsal carina basally; dorsal surface of hind coxa with short setae in basal half; hind femur 3.2–3.4× as long as wide; hind tibia with longer spur 1.1–1.2× as long as width of hind tibia, 0.5–0.6× length of basitarsus; shorter spur 0.5–0.6× 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 3/5 metasoma, 1.0–1.1× as long as hind tibia.

Male. Unknown.

Distribution. Japan (Kyushu).

Host information. Unknown.

Remarks. Females of T. brevicaudatus are similar to T. pascuorum Bouček , a European species (Graham & Gi- jswijt 1998), by having the following characters: antenna clavate; scape not reaching anterior ocellus; each funicular segment bearing longitudinal sensilla arranged in one row; notaulus shallow; ovipositor sheath 1.0–1.1× as long as hind tibia. However, females of T. brevicaudatus can be distinguished from T. pascuorum by having the following features: POL 2.3–2.5× OOL (1.7–1.9× OOL in T. pascuorum ); OOL 1.1× OD (1.5× OD in T. pascuorum ); dorsellum without median carina (with a median carina in T. pascuorum ); propodeum wholly reticulate (with superficial striae, smoother medially in T. pascuorum ).

Figures

FIGURE 2 a–d. ♀, lateral view. a, T. brevicaudatus; b, T. hirtipennis; c, T. macrops; d, T. matsunagae.

FIGURE 5 a–h. Antenna. a, T. achyranthii ♀; b, T. achyranthii ♂; c, T. aciculatus ♀; d, T. aciculatus ♂; e, T. acutissimus ♀; f, T. acutissimus ♂; g, T. angustitemple ♀; h, T. brevicaudatus ♀. Scale lines 0.25 mm.

FIGURE 12 a–d. T. brevicaudatus ♀. a, head, frontal view; b, mesoscutum, dorsal view; c, scutellum, dorsal view; d, propodeum, dorsal view.

FIGURE 24 a–h. ♀ fore wing upper surface. a, T. achyranthii; b, T. aciculatus; c, T. acutissimus; d, T. angustitemple; e, T. brevicaudatus; f, T. hirtipennis; g, T. macrops; h, T. matsunagae. Scale lines 0.5 mm.