Gonatocerus (Cosmocomoidea) brachyurus
Creators: name: Triapitsyn, Serguei V.
name: Huber, John T.
name: Logarzo, Guillermo A.
name: Berezovskiy, Vladimir V.
name: Aquino, Daniel A.
Publisher: name: Zenodo
Year: 2010
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Mymaridae
Gonatocerus
Gonatocerus brachyurus

description: Gonatocerus (Cosmocomoidea) brachyurus (Ogloblin, 1938)
(Figs 228–233)
Lymaenon brachyurus Ogloblin 1938b: 32 –35. Type locality: Tigre, Buenos Aires, Argentina. Gonatocerus (Gonatocerus) brachyurus (Ogloblin): De Santis 1967: 103 (catalog). Gonatocerus brachyurus (Ogloblin): Yoshimoto 1990: 39 (list); Luft Albarracin et al. 2009: 9 (list; distribution in Argen-
tina).
Lymaenon brachyurus Ogloblin: Loiácono et al. 2005: 13 (type information).
Type material examined. Holotype female [MLPA] on slide labeled: 1. “ Lymaenon brachyurus A. O. ♀ Tigre 1937. A. O Typus.”; 2. ‘3853”; 3. [Red circle] “Holo-type”. The holotype, although insufficiently cleared, is in good condition, complete, perfectly spread out, and mounted dorsoventrally.
Material examined. ARGENTINA. BUENOS AIRES: Canal San Fernando, A.A. Ogloblin: 7.x.1945 [1 ♀, MLPA]; 9.iii.1947 [1 ♀, MLPA]; x.1947 [2 ♀, MLPA]. José C. Paz, ii.1940, A.A. Ogloblin [4 ♀, MLPA]. Moreno, 34°08’57’’S 58°46’57’’W, 16.x.2005, C. Coviella [1 ♀, UCRC]. Near Ingeniero Otamendi, Río Paraná de las Palmas bank, 34°10’52.7’’S 58°52’12.8’’W, 6 m, 23.i.2003, S.V. Triapitsyn, M.C. Hernández [6 ♀, UCRC]. Tigre: 1937, A.A. Ogloblin [1 ♀, MLPA]; 11.ii.1945, A.A. Ogloblin [1 ♀, MLPA]; 34°23’50’’S 58°34’32’’W, 5 m, G.A. Logarzo: 2–9.xi.2005 [3 ♀, UCRC]; 9–16.xi.2005 [7 ♀, 1 ♂, UCRC]; 23–28.xi.2005 [17 ♀, UCRC]; 27.xii.2005 – 3.i.2006 [6 ♀, UCRC]; 3–10.i.2006 [13 ♀, 7 ♂: CNCI (1 ♀, 1 ♂), MLPA (1 ♀, 1 ♂), UCRC (11 ♀, 5 ♂)]; 10–17.i.2006 [2 ♀, UCRC]; 2–11.ii.2006 [4 ♀, UCRC]; 12–23.iii.2006 [1 ♂, UCRC]; 1–14.iv.2006 [3 ♀, 3 ♂, UCRC]; 16–28.iv.2006 [1 ♂, UCRC]. CORRIENTES, Yapeyú, exposed 19– 22.xii.2001, emerged 2.i.2002, G.A. Logarzo, V. Manrique, from sentinel eggs of Tapajosa rubromarginata (Signoret) [2 ♀, 1 ♂, UCRC]. MISIONES, Eldorado, exposed 8–11.ix.2004, emerged 1–5.x.2004, G.A. Logarzo, L. Varone (from sentinel eggs of T. rubromarginata) [2 ♀, UCRC].
Redescription. FEMALE (holotype and non-type specimens). Body length 1000–1494 µm. Body and flagellum mostly brown to dark brown except petiole as well as base and very tip of gaster pale or yellowish; scape, pedicel and legs yellowish to light brown.
Antenna (Fig. 228) with radicle about 0.3x total length of scape, rest of scape 2.6–3.1x as long as wide, faintly longitudinally striate; pedicel slightly longer than F1; F1 without mps, about as long as F8, F2–F5 more or less subequal in length (F3 slightly longer when bearing a mps), a little longer than following funicle segments; F2 either without or with 1 mps (a very short mps at apex of one antenna of holotype), F3 and F4 each usually with 1 mps (F3 occasionally without and F4 sometimes with 2 mps), F5–F8 each usually with 2 mps (F6 rarely with just 1 mps); clava with 8 mps, 3.1–3.9x as long as wide, about as long as combined length of F6–F8 or slightly shorter.
Mesosoma (Fig. 230). Mesoscutum and scutellum almost smooth; propodeum (Fig. 229) with slightly curved submedian carinae almost extending to propodeal anterior margin, smooth between them and also between submedian and lateral carinae. Forewing (Fig. 231) 3.7–4.1x as long as wide; longest marginal seta about 0.25x maximum wing width; disc with a brown band behind and beyond stigmal vein and a much wider brownish band occupying entire apical third or so of the wing; mostly bare behind submarginal and marginal veins except for a few setae just behind apex of marginal vein, and densely setose elsewhere. Hind wing 21– 23x as long as wide; disc with a row of setae along each margin and a few additional setae, almost hyaline but with a slight brownish tinge basally and apically; longest marginal seta 2.5–2.8x maximum wing width.
Petiole 1.9–2.2x as wide as long; gaster longer than mesosoma; ovipositor about 0.9x length of gaster, notably exserted beyond gastral apex by 0.12–0.17x own length; 1.8–2.0x as long as mesotibia.
Measurements (µm) of the holotype. Total body length: 1494; head 203; mesosoma 505; petiole 39; gaster 744; ovipositor 836. Antenna: radicle 75; rest of scape 151; pedicel 64; F1 61; F2 85; F3 91; F4 88; F5 84; F6 76; F7 74; F8 63; clava 215. Forewing 1506:400; longest marginal seta 105. Hind wing 1132:54; longest marginal seta 133.
Description. MALE (previously unknown). Body length 1050–1240 µm. Similar to female except for normal sexually dimorphic features and the following. Forewing (Fig. 232) about 4.0x as long as wide. Genitalia as in Fig. 233.
Diagnosis. Gonatocerus (Cosmocomoidea) brachyurus is a member of the ater subgroup of the ater species group. It is a relatively large species that is recognizable by the forewing (Fig. 231) having 2 brown bands on the disc and females having a long ovipositor that projects beyond the gastral apex by 0.12–0.17x own length (Fig. 230). Males may be confused with the smaller males of G. (Cosmocomoidea) tuberculifemur (Ogloblin), which have no distinct apical brown band on the forewing, and also with related forms, such as G. (Cosmocomoidea) sp. 3, which has a subapical brown spot rather than a band. It is also genetically distinct from G. tuberculifemur (de León et al. 2006c; Triapitsyn et al. 2008).
Distribution. NEOTROPICAL: Argentina.
Host. Tapajosa rubromarginata (Signoret) (Cicadellidae) [new record].
description: Published as part of Triapitsyn, Serguei V., Huber, John T., Logarzo, Guillermo A., Berezovskiy, Vladimir V. & Aquino, Daniel A., 2010, Review of Gonatocerus (Hymenoptera: Mymaridae) in the Neotropical region, with description of eleven new species, pp. 1-243 in Zootaxa 2456 on pages 122-125, DOI: 10.5281/zenodo.894928