Ooctonus Triapitsyn, 2010, sp. n.
Creators: name: Triapitsyn, Serguei V.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Ooctonus

description: Ooctonus us Triapitsyn, sp. n.   
(Figs 99–105)  
 Type material. Holotype female [UCRC ENT 110709] on slide: REPUBLIC OF KOREA (SOUTH KOREA). GYEONGGI-DO, Suwon-si, Seodun-dong, Yeogisan, 7.x.1997, J.-Y. Choi, yellow pan trap. Paratypes: JAPAN. Honshu Island, IBARAKI, Tsuchiura, 16–27.x.1989, M.J. Sharkey, yellow pan trap, marsh [1 ♀ on slide, CNCI]. REPUBLIC OF KOREA. GYEONGGI-DO, Suwon-si, Seodun-dong: Seoul National University, 10.x.1997, J.-Y. Choi, yellow pan traps [1 ♂ on point and 1 ♂ on slide, UCRC]. Yeogisan, 7.x.1997, J.-Y. Choi, yellow pan trap [1 ♀ on point, UCRC].   
 Description. FEMALE. Body length 1220–1400 µm. Head and mesosoma black, petiole brown, gaster dark brown; scape and pedicel brown, flagellum dark brown; coxae dark brown, remainder of leg segments mostly brown except 3 basal tarsomeres of all legs light brown.   
Head with weak sculpture on face and somewhat stronger reticulate sculpture on vertex.  
Antenna (Fig. 99) with scape plus radicle a little longer than clava, radicle about 0.2x length of scape, remainder of scape 3.3–3.6x as long as wide, faintly longitudinally striate; pedicel a little longer than F1; in lateral view, F5–F8 much wider than F1–F4; F1, F3, and F5 subequal in length and the longest funicle segments; F2, F6, F7, and F8 subequal in length and slightly shorter than F1, F3, or F5; F4 the shortest funicle segment; F1–F4 without mps, F5–F8 each with 2 longitudinal sensilla; clava 2.5–2.8x as long as wide, a little longer than combined length of F6–F8 or F1–F3, with 7 mps.  
Mesosoma with pronotum mostly weakly sculptured (Fig. 100); mesoscutum (Fig. 100) and scutellum (Fig. 101) with reticulate sculpture; metanotum smooth, posterior margin of dorsellum almost straight; propodeum (Fig. 101) mostly smooth, with large median areole extending to or almost to anterior margin of propodeum, thus median carina practically absent or very short; lateral carinae not parallel, extending to anterior margin of propodeum.  
Forewing (Fig. 102) 2.6x as long as wide; disc with a slight brownish tinge throughout, densely setose but bare behind base of submarginal vein, moderately to strongly truncate apically; longest marginal seta 0.15– 0.17x greatest width of wing. Hind wing (Fig. 103) 13–15x as long as wide; disc with a slight brownish tinge and densely setose except basally; longest marginal seta 1.5–1.7x greatest width of wing.  
Pro- and mesocoxae smooth, metacoxa with weak sculpture.  
Petiole about 2.9x as long as wide, almost smooth, 1.0–1.1x as long as metacoxa; ovipositor occupying 0.7–0.8x length of gaster, not exserted beyond apex of gaster, about 0.9x length of metatibia.  
Measurements (µm) of the holotype: Body: 1400; head: 190; mesosoma: 609; petiole: 148; gaster: 492; ovipositor: 418. Antenna: radicle: 40; rest of scape: 154; pedicel: 63; F1: 55; F2: 48; F3: 55; F4: 40; F5: 54; F6: 49; F7: 49; F8: 49; clava: 173. Forewing: 1292:492; longest marginal seta: 82. Hind wing: 965:72; longest marginal seta: 121. Legs (given as coxa, femur, tibia, tarsus): fore: 121, 255, 246, 261; middle: 106, 264, 384, 264; hind: 139, 303, 445, 279.  
MALE. Body length 1290–1300 µm. Similar to female except for the normal sexually dimorphic features and the following. Antenna (Fig. 104) with scape, pedicel, and some leg segments a little darker than in female (particularly 3 basal tarsomeres of all legs brown), scape plus radicle 4.2–4.3x as long as wide, forewing 2.7–2.8x as long as wide; genitalia as in Fig. 105.  
 Diagnosis. Among the Palaearctic species of Ooctonus, O. us sp. n. is most similar to O. notatus, which has a similar mesosoma and relatively short segments of the female antenna, but O. notatus lacks mps on F6 of the female antenna and has leg segments notably lighter colored (yellowish to light brown).   
 Hosts. Unknown.   
 Etymology. The species name (a noun is apposition) means a mustache (moustache) in Russian.
description: Published as part of 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, pp. 1-74 in Zootaxa 2381 (1) on pages 51-53, DOI: 10.11646/zootaxa.2381.1.1, http://zenodo.org/record/5311691