Torymus macrops Matsuo, 2020

Matsuo, Kazunori, 2020, A revision of Japanese Torymus Dalman (Hymenoptera: Torymidae), Zootaxa 4758 (3), pp. 401-441 : 422-423

Torymus macrops Matsuo n. sp.

Figs 2c , 6c , 14 a–d, 24g

Etymology. The specific name, macrops , is Latin meaning “large eye”, in reference to the size of the compound eye of female of this species.

Type material. Holotype: ♀ ( BLKU), emerged on 24–29 April 2007 from a gall of Mikiola glandaria on Fagus crenata collected by S. Sato and K. Matsuo on 30 March 2007 from Mt. Takanosu, Akitakada, Hiroshima, Japan. Paratype: 1 ♀, same data as the holotype ( BLKU).

Description. Female. Body length excluding ovipositor sheath 2.7–3.3 mm. Head dark green with violet reflection. Scape yellow; pedicel black, yellowish basally; all flagellomeres black. Mesosoma dark green with violet reflection. Fore wing with an infumate streak. Legs yellow; claws brown. Metasoma dark green with violet reflection, with basal part yellowish ( Fig. 2c ).

Head 2.0–2.2× as wide as long in dorsal view; temple narrow, 0.01–0.03× as long as dorsal length of eye; POL 1.7–1.9× OOL; OOL 1.0–1.1× OD. Head 1.2–1.3× as wide as high in frontal view ( Fig. 14a ); eyes separated by 0.7–0.8× their height; malar space narrow, 0.1–0.2× height of eye; mouth 3.1–3.5× malar space; gena straight; clyp- eus with apical margin slightly produced, truncate medially. Antenna not clearly clavate ( Fig. 6c ); scape 0.6–0.7× as long as height of eye, just reaching ventral margin of anterior ocellus; combined length of pedicel and flagellum 1.3× width of head; pedicel about twice× as long as wide; anellus quadrate; F1 1.4–1.5× as long as wide, shorter than pedicel; F2–F4 1.5–1.6× longer than wide; F5 1.2–1.3× longer than wide; F6 1.0–1.1× longer than wide; F7 quadrate; each funicular segment bearing longitudinal sensilla arranged in two rows; C3 with a small tuft of micropilosity beneath.

Mesosoma 1.5–1.7× as long as wide; mesoscutum ( Fig. 14b ) with large piliferous punctures; notaulus shallow; scutellum ( Fig. 14c ) 1.2–1.3× as long as wide, with large piliferous punctures; dorsellum without median carina; propodeum ( Fig. 14d ) reticulate; lower mesepimeron 1.2–1.3× as long as wide. Fore wing ( Fig. 24g ) 2.6–2.8× as long as wide; costal cell 11.0–13.0× 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, hairy; cubital setal line present; basal setal line present; speculum closed below, narrow; relative lengths of marginal vein: postmarginal vein: stigmal vein=9.3: 2.4: 1.0. Hind coxa 1.8–2.0× as long as wide, with dorsal carina basally; dorsal surface of hind coxa bare in basal half; hind femur 3.9–4.3× as long as wide; hind tibia with longer spur 0.9–1.1× as long as width of hind tibia, 0.3–0.4× 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 0.6 length of metasoma, with short setae; ovipositor sheath as long as metasoma plus three–fourths of mesosoma, 2.6× as long as hind tibia.

Male. Unknown.

Distribution. Japan (Honshu).

Host information. Torymus macrops is an ectoparasitoid of Mikiola glandaria Sato and Yukawa ( Diptera : Cecidomyiidae ) that induces galls on Fagus crenata Blume (Fagaceae) (gall photo: C–166 of Yukawa & Masuda 1996).

Remarks. Females of T. macrops are similar to T. fagineus Graham , a European species ( Graham & Gijswijt 1998), by having the following characters: antenna slender; dorsellum without median carina; propodeum reticulate; fore wing with an infumate streak; costal cell on upper surface with a setal row in distal half, on lower surface with a complete setal row and scattered setae; basal cell closed, hairy; speculum closed below; hind coxa with dorsal carina basally; dorsal surface of hind coxa bare in basal half; posterior margin of metasomal tergum five incised; ovipositor sheath as long as metasoma plus three–fourths of mesosoma. However, females of T. macrops can be distinguished from T. fagineus by having the following features: temple narrow, 0.01–0.03× as long as dorsal length of eye (0.05–0.13× in T. fagineus ); POL 1.7–1.9 OOL (2.3–2.7 in T. fagineus ); scape just reaching ventral margin of anterior ocellus (reaching distinctly above vertex in T. fagineus ); each funicular segment bearing longitudinal sensilla arranged in two rows (F1 with a row of sensilla in T. fagineus ); hind coxa 1.8–2.0× as long as wide (about 3.0× as long as wide in T. fagineus ).

Figures

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

FIGURE 6 a–g. Antenna. a, T. hirtipennis ♀; b, T. hirtipennis ♂; c, T. macrops ♀; d, T. matsunagae ♀; e, T. minamii ♀; f, T. minamii ♂; g, T. quernus ♀. Scale lines 0.25 mm.

FIGURE 14 a–d. T. macrops ♀. 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.