Ooctonus tretiakovi Triapitsyn, 2010

Triapitsyn, Serguei V., 2010, Revision of the Palaearctic species and review of the Oriental species of Ooctonus (Hymenoptera: Mymaridae), with notes on extralimital taxa 2381, Zootaxa 2381 (1), pp. 1-74 : 50-51

Ooctonus tretiakovi Triapitsyn , sp. n.

( Figs 93–98 )

Type material. Holotype female [ ZIN] on slide: RUSSIA. PRIMORSKIY KRAY, Gornotayozhnoye (18 km SE of Ussuriysk), 43.66°N 132.25°E, 200 m, 10–15.ix.1999, M.V. Michailovskaya, yellow pan trap, UCRC ENT 013054 . Paratypes: RUSSIA. PRIMORSKIY KRAY, Gornotayozhnoye (18 km SE of Ussuriysk), 43.66°N 132.25°E, 200 m, M.V. Michailovskaya : 15–16.vi.1999 [1 ♀ on slide, UCRC] ; 26–28.vi.1999 [1 ♀ on slide, UCRC] ; 11–14.vii.1999 [1 ♀ on slide, ZIN] ; 13–14.vii.1999 [1 ♀ on slide, UCRC] ; 24.vii– 1.viii.1999 [1 ♀ on slide, UCRC] ; viii.1999 [1 ♀ on slide, UCRC] ; 10–15.ix.1999 [1 ♀ on slide, IBPV] ; 9– 12.x.2000 [1 ♀ on slide, UCRC] ; 12–15.viii.2002 [1 ♀ on slide, UCRC] ; 11–16.vii.2003 [2 ♀ on slides, CNCI, UCRC] ; 17–23.vii.2003 [1 ♀ on slide, UCRC]. SAKHALINSKAYA OBLAST’, Sakhalin Island , about 4 km E of Sokol , 16.viii.2001, D.J. Bennett, T. Anderson [2 ♀ on slides, CAS] .

Description. FEMALE. Head and mesosoma dark brown, petiole light brown, gaster brown; scape, pedicel and F1 light brown to brown, F2–F8 and clava brown to dark brown; legs yellowish or light brown.

Head with weak, mostly inconspicuous sculpture (more evident on vertex).

Antenna ( Fig. 93 ) with scape plus radicle about as long or a little longer than clava, radicle 0.18x length of scape, remainder of scape 4.6–5.4x as long as wide, faintly longitudinally striate; pedicel a little longer than F1; all funicle segments much longer than wide, F1 the shortest funicle segment, F2–F8 more or less subequal in length (F5 slightly longer and F8 slightly shorter), F1 and F2 without mps, F3–F8 each usually with 2 longitudinal sensilla except F3 sometimes with just 1 mps on one or both antennae or, occasionally, without mps, and F4 occasionally with just 1 mps; clava 3.2–4.4x as long as wide, about as long or a little shorter than combined length of F6–F8 and about as long a or a little longer than combined length of F1–F3, with 7 mps.

Mesosoma ( Fig. 94 ) with pronotum weakly sculptured; mesoscutum and scutellum with reticulate sculpture (the cells on anterior scutellum a little smaller than on mesoscutum and posterior scutellum), midlobe of mesoscutum almost always at least with a short, narrow median groove at posterior margin only (of various length, usually narrower posteriorly than width of a notaulus, anteriorly narrowing and extending up to about 0.44x length of mesoscutum but usually significantly less than that, rarely not evident in smaller specimens); metanotum smooth, posterior margin of dorsellum slightly, broadly rounded; propodeum ( Fig. 95 ) mostly smooth, with median carina usually long and extending or almost extending to anterior margin of propodeum but sometimes abbreviated or shorter than median areole, lateral carinae very long, almost parallel to median carina, not split anteriorly, and extending or almost extending to anterior margin of propodeum.

Forewing ( Fig. 97 ) 3.0–3.3x as long as wide; disc with a slight brownish tinge throughout, densely setose but bare behind base of submarginal vein, usually slightly truncate apically; longest marginal seta 0.18–0.25x greatest width of wing. Hind wing ( Fig. 98 ) 17–19x as long as wide; disc with a slight brownish tinge and densely setose except basally; longest marginal seta 1.8–2.1x greatest width of wing.

Pro- and mesocoxae smooth, metacoxa with reticulate sculpture.

Petiole 4.0–4.7x as long as wide, wider apically than basally, smooth, 1.3–1.5x as long as metacoxa; gaster as in Fig. 96 ; ovipositor occupying 0.4–0.8x length of gaster, slightly exserted beyond apex of gaster, 0.6–0.7x length of metatibia.

Measurements (µm) of the holotype: Mesosoma: 498; petiole: 212; ovipositor: 285. Antenna: radicle: 36; rest of scape: 164; pedicel: 61; F1: 52; F2: 67; F3: 70; F4: 70; F5: 72; F6: 68; F7: 68; F8: 64; clava: 188. Forewing: 1292:412; longest marginal seta: 91. Hind wing: 997:54; longest marginal seta: 97. Legs (given as coxa, femur, tibia, tarsus): fore: 115, 236, 258, 318; middle: 103, 261, 370, 328; hind: 145, 279, 442, 348.

MALE. Unknown.

Diagnosis. Among the Palaearctic species of Ooctonus that normally have at least a very short median groove on the midlobe of mesoscutum, O. tretiakovi is most similar to O. orientalis but lacks the broad Yshaped anterior split of each of the lateral carinae on the propodeum. It differs from O. spartak in having at least 1 mps on F4 of the female antenna and also a relatively smaller median areole on the propodeum, and from O. saturn in having mps at least on F4–F8 of the female antenna.

Hosts. Unknown.

Etymology. This species is named after my father-in-law, Mikhail Efimovich Tretiakov, who during several years collected (using a Malaise trap) many interesting fairyflies and other insects in Fryazevo, Noginskiy rayon, Moskovskaya oblast’, Russia.

Figures

FIGURES 93–98. Ooctonus tretiakovi ♀ (holotype): 93, antenna; 94, mesosoma; 95, posterior scutellum, metanotum, and propodeum; 96, gaster; 97, forewing; 98, hind wing.