Torymus aiolomorphi ( Kamijo, 1964 )

Matsuo, Kazunori, Yang, Man - Miao, Tung, Gene - Sheng, Tokuda, Makoto & Yukawa, Junichi, 2012, Description of a new and redescriptions of two known species of Tor ym u s (Hymenoptera: Torymidae) in Taiwan with a key to Taiwanese species, Zootaxa 3409, pp. 47-57 : 51-54

Torymus aiolomorphi ( Kamijo, 1964)

Figs 12–20

Diomorus aiolomorphi Kamijo, 1964: 16 .

Torymus aiolomorphi ; Graham & Gijswijt, 1998: 11.

Material examined. Holotype: Ƥ, emerged on 29 May 1962 from a gall of Aiolomorphus rhopaloides collected by F. Kobayashi from Kyoto, Japan ( HUM).

Paratype: 1Ƥ, emerged on 5 May 1963 from a gall of Aiolomorphus rhopaloides collected by S. Yoshida from Kagawa, Japan ( HUM).

Other specimens: 13, collected by I. Togashi on 5 June 1973 from Bessho, Kanazawa, Ishikawa, Japan ( ELKU); 1Ƥ, collected by S. Kamitani on 5 June 1996 from Hakozaki, Fukuoka, Fukuoka, Japan ( ELKU); 1Ƥ, collected by I. Togashi on 3 June 1973 from Kanazawa, Ishikawa, Japan ( ELKU); 3Ƥ and 23, collected by S. Okudera on 27 May 2010 from Kumura, Taki, Izumo, Shimane, Japan ( ELKU); 2Ƥ, collected by F. Takahashi in May 1969 from Kyoto, Japan ( HUM); 1Ƥ, collected by A. Matsunaga on 18 May 2001 from Motooka, Fukuoka, Fukuoka, Japan ( ELKU); 13, collected by K. Kubo on 2 June 2002 from Yokohama, Kanagawa, Japan ( HUM).

Redescription. FEMALE ( Fig. 12 ). Body length excluding ovipositor sheath 4.5–5.5 mm. Head bluish green. Scape yellowish brown, darker apically; pedicel and flagellomeres black. Mesosoma bluish green. Fore wing with brownish marking around stigmal vein. Fore coxa yellowish brown, darker at base; mid coxa concolorous with mesosoma; hind coxa yellowish brown in apical one-third; femora and tibiae yellowish brown. Metasoma laterally with yellowish brown area extending from base to middle of metasoma.

Head 2.3–2.4× as wide as long in dorsal view; temples about 0.2× as long as dorsal length of eye; POL 1.3–1.4× OOL; OOL 1.2–1.3× OD. Head 1.2–1.3× as wide as high in frontal view ( Fig. 13 ); eyes separated about 1.1× by their height; malar space 0.3–0.4× height of eye; mouth 1.9–2.1× malar space; clypeus with apical margin truncate; mandible with three teeth. Antenna ( Fig. 14 ) not clearly clavate; scape 0.6–0.7× as long as height of eye, reaching anterior ocellus; combined length of pedicel and flagellomeres 1.2–1.3× width of head; pedicel 1.5–1.6× as long as wide; anellus transverse, about 2.0× as wide as long; F1–F3 1.3–1.5× as long as wide; F4–F7 1.0–1.1× as long as wide; each segment bearing longitudinal sensilla arranged in two or three irregular rows.

Mesosoma 1.7–2.0× as long as wide; mesoscutum ( Fig. 15 ) with large piliferous punctures; sculpture on mesoscutum transversely wrinkled; notaulus distinct; scutellum ( Fig. 16 ) about 1.3× as long as wide; frenal line indistinct, strongly sinuate; frenal area with sparse piliferous punctures, smoother posteriorly; dorsellum without median carina; propodeum ( Fig. 17 ) with median elevated area which is longitudinally striate; lower mesepimeron 1.3–1.5× as long as wide. Fore wing 2.6–2.8× as long as wide ( Fig. 18 ); costal cell 8.5–9.1× as long as wide, on upper surface with a setal row, which becomes double apically, on lower surface with scattered setae; basal cell closed below, hairy; speculum small, closed below; relative length of marginal vein: postmarginal vein: stigmal vein = 5.1: 2.7: 1.0; stigmal vein petiolate. Hind coxa 1.6–1.7× as long as wide, dorsally with carina and pilose throughout; hind femur ( Fig. 19 ) with a slender tooth ventrally in apical part, 3.5–3.8× as long as wide; hind tibia with longer spur 1.1–1.3× as long as width of hind tibia, 0.4–0.5× length of basitarsus, and 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 about 0.6 length of metasoma; ovipositor sheath as long as metasoma plus half of mesosoma, 2.4–2.6× as long as hind tibia.

MALE. Differs from female as follows. Body length 2.1–3.7 mm. Temple about 0.3× as long as dorsal length of eye; OOL 1.5–1.6× OD; eyes separated 1.2–1.3× by their height. Antennal ( Fig. 20 ) scape dark green, not reaching anterior ocellus; pedicel 1.2–1.3× as long as wide; F1–F7 quadrate. Metasoma dark green.

Distribution. This species has been recorded from Japan (Honshu, Shikoku, Kyushu), Taiwan ( Kamijo 1964), and People’s Republic of China ( Sun et al. 1994).

Host information. Torymus aiolomorphi is an inquiline of Aiolomorphus rhopaloides inducing galls on Phyllostachys heterocycla and P. bambusoides ( Takahashi & Mizuta 1971; Yukawa & Masuda 1996; Shibata 2001).

Remarks. Among other members of the T. cupreus –group, T. aiolomorphi is most similar to T. cupreus because of the following shared features: dorsal surface of hind coxa pilose throughout, dorsellum without median carina, antenna not clearly clavate, and each funicle segment bearing longitudinal sensilla arranged in two or three irregular rows. Females of T. cupreus have a straight frenal line and a polished frenal area on the scutellum, large depressions on the propodeum, and a shorter antennal scape that does not reach the anterior ocellus. Torymus aiolomorphi is distinguished from T. cupreus by the following features: frenal line strongly sinuate, frenal area with a several setae, propodeum with median elevated area which is longitudinally striate, and scape reaching anterior ocellus.

Figures

FIGURE 12. Female of Torymus aiolomorphi.

FIGURES 13 – 20. Torymus aiolomorphi: 13, Ƥ head, frontal view; 14, Ƥ antenna; 15, Ƥ mesoscutum; 16, Ƥ scutellum; 17, Ƥ propodeum; 18, Ƥ fore wing, upper surface; 19, Ƥ hind femur; 20, 3 antenna. Scale bars: 0.5 mm.