Torymus itoi Matsuo

Matsuo, Kazunori, 2010, A redescription of To r y m u s sapporoensis Ashmead and description of a new species of Tory m u s Dalman (Hymenoptera: Torymidae) parasitizing Paratephritis fukaii (Diptera: Tephritidae) in Japan, Zootaxa 2410, pp. 53-58 : 54-56

Torymus itoi Matsuo , sp. nov.

Figs 1–8

Torymus sapporoensis Ashmead ; Ito, 1947: 98 –99, 101. Misidentification.

Etymology. The specific name honors Dr. Syusiro Ito who first reared this species from galls of P. f u k a i i.

Type material. Holotype ( ELKU, Type No. 3291). Ƥ, emerged on 27 July 2007 from a gall of Paratephritis fukaii on Farfugium japonicum collected by J. Yukawa, K. Tsuda and K. Matsuo on 20 July 2007 in Daizaka, Kinpo, Minamisatsuma City, Kagoshima Prefecture, Japan.

Paratypes ( ELKU). 11Ƥ, 83 paratypes as follows: 2Ƥ and 43, same data as holotype; 1Ƥ, emerged on 28 July 2007 from a gall of P. fukaii on F. japonicum collected by J. Yukawa, K. Tsuda and K. Matsuo on 20 July 2007 in Daizaka, Kinpo, Minamisatsuma City, Kagoshima Prefecture; 1Ƥ and 23, emerged on 6 November 2008 from a gall of P. fukaii on F. japonicum collected by T. Yamaguchi on 22 October 2008 in Mt. Kinpo, Kinpo, Minamisatsuma City, Kagoshima Prefecture; 7Ƥ and 23, emerged on 19 and 21 June 1944 from galls of P. f u k a i i on F. japonicum collected by Syusiro Ito from Kyudai-Kasuya-Ensyurin (= the Research Institute of Kyushu University Forests, Sasaguri Town, Fukuoka Prefecture, Japan.).

Description. FEMALE. Body length excluding ovipositor sheaths 3.4–4.8 mm. Head bluish green. Scape brownish yellow with apical tip darker; pedicel and all flagellomeres black. Mesosoma bluish green. Wings hyaline. Fore coxa yellowish brown; mid coxa yellowish brown ventrolaterally; hind coxa concolorous with mesosoma; all femora and tibiae yellowish brown; claws brown. Metasoma bluish green with coppery tint.

Head 2.0–2.2x as wide as long in dorsal view ( Fig. 1 ); temple 0.20–0.22x longer than dorsal length of eye, straight; POL 1.7–1.9x OOL; OOL 1.1–1.3x OD. Head 1.1–1.2x as wide as high in frontal view ( Fig. 2 ); eyes separated by their height; malar space 0.37–0.40x height of eye; mouth 1.9–2.0x malar space; gena curved; torulus situated 1.3–1.6x its own diameter above ventral margin of eye; clypeus with apical margin rounded; mandible with three teeth. Antenna ( Fig. 3 ) not clearly clavate; scape 0.67–0.72x as long as height of eye, just reaching ventral margin of anterior ocellus; combined length of pedicel and all flagellomeres 1.4–1.5x width of head; pedicel 1.7–1.9x as long as wide; anellus quadrate; F1 1.5–1.7x as long as wide, slightly longer than pedicel; F2–F5 1.3–1.6x longer than wide; F6 1.1–1.3x longer than wide; F7 quadrate; each segment bearing longitudinal sensilla arranged in two rows; apical clavomere (C3) with a small tuft of micropilosity beneath.

Mesosoma 1.8–2.0x as long as wide; mesoscutum ( Fig. 4 ) with small piliferous punctures; sculpture on mesoscutum in anterior half transversely reticulate, in posterior half scaly reticulate; notaulus complete, distinct; scutellum ( Fig. 5 ) 1.3–1.4x as long as wide, sculptured as posterior part of mesoscutum; dorsellum without median carina; propodeum ( Fig. 6 ) with superficial striae, smoother medially; lower mesepimeron 1.1–1.3x as long as wide. Forewing ( Fig. 7 ) 2.4–2.6x as long as wide; costal cell 11.0–13.4x as long as wide, on upper surface with a setal row sparse in middle, on lower surface with a complete setal row and scattered setae; basal cell closed, with a row of setae below submarginal vein; speculum narrowly open below; relative length of marginal vein: postmarginal vein: stigmal vein = 10.6: 2.4: 1.0; stigmal vein weakly petiolate. Hind coxa 1.8–2.1x as long as wide, angulate anteriorly, with dorsal carina at base; dorsal surface of hind coxa with short setae in basal half; hind femur 4.1–4.5x as long as wide; hind tibia with longer spur 1.2–1.4x as long as width of hind tibia, 0.3–0.4x length of basitarsus; shorter spur 0.6–0.7x length of longer spur.

Metasoma as long as mesosoma plus head; posterior margin of metasomal tergum five emarginate; tip of hypopygium situated at about 0.7 length of metasoma, with short setae; ovipositor sheath as long as metasoma plus three-fourths length of mesosoma, 2.9–3.2x as long as hind tibia.

MALE. Differs from female as follows: Body length 2.2–3.3 mm. Temple 0.26–0.30x longer than apparent length of eye. Antenna ( Fig. 8 ) stouter than that of female; scape bluish green, not reaching anterior ocellus; pedicel quadrate; F1–F5 quadrate; F6–F7 transverse; longitudinal sensilla on each segment arranged in one row. Relative length of marginal vein: postmarginal vein: stigmal vein = 8.7: 2.2: 1.0. Hind tibia with spur longer, 0.4–0.5x length of basitarsus.

Distribution. Japan (Kyushu).

Host insect. Paratephritis fukaii ( Diptera : Tephritidae ).

Associated host plant. Farfugium japonicum (Asteraceae) .

Figures

FIGURES 1 – 8 Torymus itoi Matsuo, sp. nov. 1, Ƥ head, dorsal view; 2, Ƥ head, frontal view; 3, Ƥ antenna; 4, Ƥ mesoscutum; 5, Ƥ scutellum; 6, Ƥ propodeum; 7, Ƥ forewing, upper surface; 8, ♂ antenna. Scale lines: 0.5 mm.