Aphidencyrtoides tachikawai Japoshvili, 2016

Japoshvili, George, Higashiura, Yoshimitsu & Kamitani, Satoshi, 2016, A review of Japanese Encyrtidae (Hymenoptera), with descriptions of new species, new records and comments on the types described by Japanese authors, Acta Entomologica Musei Nationalis Pragae 56 (1), pp. 345-401 : 356-358

Aphidencyrtoides tachikawai Japoshvili , sp. nov.

( Figs 1–2 , 16–20 ) Type material. HOLOTYPE: ♀, Mt. Kurodake, Shounai , Ooita Pref., swept, 13.vi.1996, Y. Higashiura lgt. ( ELKU). PARATYPES: 10 ♀♀ (1 ♀ on slide), same data as holotype ; 8 ♀♀, Aburayama , Fukuoka, ex Nipponaphis cuspidatae , 28.–30.v.1959, Y. Murakami lgt. ( ELKU, 2 ♀♀ in IEAUG) .

Diagnosis. Female (length about 1.14–1.43 mm) ( Figs 1–2 ). Head and mesosoma generally black; scape and pedicel brown; funicle light brown and apical 2 segments of clava generally darker than other flagellar segments; legs generally dark brown, only apical tip of hind tibia, apical 1/3 of fore tibia, apical 1/2 to 3/5 of mid tibia, apical tip of mid femora and tarsal segments (except hind leg last tarsal segment, which is brown) yellow; wings hyaline; scape about 4–5× as long as wide; pedicel about 2× as long as wide, longer than F 1 –F 2 combined. All flagellar segments at least slightly shorter than wide; F 4 –F 6 with longitudinal sensilla, sometimes F 3 also has sensilla, but F 1 –F 2 without longitudinal sensilla; frontovertex about 0.33–0.38× as wide as head; fore wing about 2.25× as long as wide; ovipositor not exserted.

Male. Unknown.

Description. Female (holotype): length, including ovipositor, 1.43 mm.

Head black, with blue-golden metallic reflection; scape, pedicel, second and third segments of clava completely brown; funicular segments light brownish; mesosoma black; pronotum, tegulae, axillae and mesoscutum, with blue-violet metallic reflection, mesopleuron with violet-golden metallic reflection; scutellum in basal part similar to that of mesoscutum, its upper half provided with a bright green-metallic reflection; metanotum and propodeum with violet to greengolden metallic reflection; legs dark brown except apical tip of hind tibia, apical 1/3 of fore tibia, apical 3/5 of mid tibia, apical tip of mid femur and tarsal segments (except hind leg last tarsal segment, which is brown) which are yellow; fore ( Fig. 16 ) and hind wings hyaline; gaster almost as black as the mesosoma; first tergite with greenish metallic reflection and remaining tergites with more violet metallic reflection.

Head ( Fig. 19 ) on frontovertex with fine, raised, regular, polygonally reticulate sculpture of mesh size almost the same size as the diameter of an eye facet; FV with black setae as long as OD; face and temple with similar, but more elongate reticulate-imbricate sculpture; gena immediately below eye with shallow, longitudinally elongate sculpture; ocellar angle about 100°; occipital margin sharp, carinate; eye reaching occipital margin; malar suture absent. Antenna as in Fig. 17 ; all flagellar segments almost transverse; F 1 –F 2 very small and their combined length 0.8× as long as pedicel; F 1 –F 2 without longitudinal sensilla; F 3 –F 6 with longitudinal sensilla each; clava with sutures parallel, but inconspicuous; mandible with an acute lower tooth and a wide truncation. Relative measurements: HW 30, FV 10, FVL 13, OD 2, POL 6, OOL 0.5, OCL 2, AOL 4, EL 17.5, EW 40, MS 10, SL 12, SW 3; ScL 19; LM 18; WS 17. Dorsum of mesosoma ( Fig. 20 ) with fine, raised, fairly regular, polygonally reticulate sculpture similar to that on frontovertex, but of slightly larger mesh size; scutellum moderately convex in profile, most strongly curved at apical 2/3 along its length; setae on disc of mesoscutum and scutellum slightly longer than those on frontovertex and stouter; setae present only on the basal half of the scutellum; propodeum on each side with a tuft of silvery setae adjacent to spiracle; mesopleuron almost touching base of metasoma; head and mesosoma combined almost 1.8× as long as metasoma. Fore wing with venation and setation as in Fig. 16 . Relative measurements: FWL 87, FWW 38; HWL 62, HWW 19.

Metasoma at the apex appears horizontally cut, so that apical horizontal line width almost 1/4 of mesosoma width; ovipositor not exserted. Relative measurements (paratype): OL 22, GL 2, MT 57 . Ovipositor as in Fig. 18 .

Differential diagnosis. This new species can be distinguished from A. thoracaphis using the characters given in the Table 1.

Etymology. Named after Japanese taxonomist working on encyrtids, Prof. Dr. Tetsusaburo Tachikawa.

Distribution. Japan: Kyushu (new record). Endemic.

Figures

Figs 1–10. 1–2 – Aphidencyrtoides tachikawai Japoshvili sp. nov., female, body. 3, 5–6 – Leptomastix teii Japoshvili sp. nov., female: 3 – head; 5–6 – body. 4, 7–8 – Psyllaephagus enokicola Japoshvili sp. nov., female: 4 – head; 7–8 – body. 9–10 – Psyllaephagus kamitanii Japoshvili sp. nov., female, body.

Figs 16–22. 16–20 – Aphidencyrtoides tachikawai Japoshvili sp. nov., female: 16 – fore wing; 17 – antenna; 18 – ovipositor; 19 – head; 20 – mesosoma. 21 – Aphycoides lecaniorum (Tachikawa, 1963), female, antenna. 22 – Aphycoides fuscipennis (Ashmead, 1904), female, antenna.