Gonatocerus (Cosmocomoidea) gracilicornis
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 gracilicornis

description: Gonatocerus (Cosmocomoidea) gracilicornis (Ogloblin, 1936)
(Figs 315–323)
Lymaenon gracilicornis Ogloblin 1936: 50 –53 + plates (láminas) II–IV (illustrations). Type locality: Loreto, Misiones, Argentina.
Gonatocerus (Gonatocerus) gracilicornis (Ogloblin): De Santis 1967: 104 (catalog).
Gonatocerus gracilicornis (Ogloblin): Yoshimoto 1990: 40 (list); Luft Albarracin et al. 2009: 9 (list; distribution in Argentina).
Lymaenon gracilicornis Ogloblin: Loiácono et al. 2005: 16 (information on specimens potentially belonging to the type series).
Type material examined. Lectotype female [MLPA], here designated to avoid the existing confusion about the status of the type specimens of this species, on slide labeled: “ Gonatocerus gracilicornis [species name ip] ♀ Loreto, Misiones 6.vi.1934.”. The lectotype, although insufficiently cleared, is in good condition, complete, almost perfectly spread out and mounted dorsoventrally. Paralectotypes [all MLPA]: 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A. O. ♂ Loreto, Misiones 19.iv.1933. A. O. Fig. [iR] Ant [al ip]”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A O. [ip] ♂ Loreto, Misiones 12.ix.1935. A. A. O.”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A. O. ♂ Loreto, Misiones 4.v.1933. A. A. O.”. The collecting dates of these specimens match those mentioned by Ogloblin (1936) for the type series of his Lymaenon gracilicornis. Also 1 ♀ on slide labeled: “ Gonatocerus gracilicornis [species name ip] ♀ Loreto, Misiones 25.xi.1933. A. A. O.”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis v. pauper [a manuscript name] A. O. ♀ Loreto, Misiones 22.x.1933.”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis v. pauper A. O. ♀ Loreto, Misiones 22.x.1933 Selva. A. A. O.”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis A. O. var. pauper n. v. ♀ Loreto, Misiones 15.iii.1933. A. O.”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis v. pauper A. O. ♀ Loreto, Misiones 22.x.1933 Selva. A. A. O.”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis A. O. ♀ Loreto, Misiones 10.x.1933.”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis A. O ♀ 23.v.1932. Loreto. Mis. A. A. O.”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A. O. ♂ Loreto, Misiones 12.x.1933. A. A. O.”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A. O. ♂ Loreto, Mis. 5.vi.1932. A. A. O.”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A. O. ♂ Loreto, Misiones 15.x.1933. A. A. O.”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A. O. ♂ Loreto, Misiones 12.x.1933. Fig. [iR]”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A. O. ♂ Loreto, Misiones 12.x.1933 A. A. O. Erec”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis A. O. ♂ 17.viii.1932. A. O. Loreto, Misiones.”; 1 ♂ on slide labeled: 1. “ Gonatocerus gracilicornis A. O. ♂ Loreto, Misiones 15.x.1933 Typus [al ip]”; 2. “3882”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis A. O. ♀ Loreto, Misiones 22.x 1933. Selva. A. A. O. Fig. [iR] Ant [al ip]”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis A. O. ♀ Loreto, Misiones 22.x.1933. T. medida.”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis var. variicornis [a manuscript name] A. O. ♀ Loreto, Misiones 18.iv.1933. A. O. Fig. [iR]”; 1 ♀ on slide labeled: “ Gonatocerus gracilicornis v. pauper A. O ♀ Loreto, Misiones 22.x.1933. Selva A. A. O.”; 1 ♂ on slide labeled: “ Gonatocerus gracilicornis [species name ip] ♂ 17.vi.1934. Loreto, Misiones.” (placement of this specimen in G. (Cosmocomoidea) gracilicornis is not certain); 1 ♂ on slide labeled: “ Gonatocerus gracilicornis [species name ip] ♂ Loreto, Misiones 2.vi.1934.” [this specimen is not G. (Cosmocomoidea) gracilicornis but rather G. (Cosmocomoidea) mumu sp. n.].
The collecting dates of the above specimens do not match the ones given in the original description, but there is little doubt that they all belong to the type series of L. gracilicornis because Ogloblin often listed the type material of his species incorrectly. The species was described from a syntype series of 12 females and 13 males, all collected in Loreto, Misiones. Of these, we examined 12 females and 12 males that can be attributed beyond reasonable doubt to the syntype series. Among Ogloblin’s slides in MLPA are 3 more males on slides, one of which potentially could also be a syntype of Lymaenon gracilicornis (particularly the first one listed below), as follows: 1 ♂ labeled: “ Gonatocerus? gracilicornis [ip] A O. ♂ Loreto, Misiones 8.vi.1934.”; 1 ♂ labeled: “ Gonatocerus gracilicornis [al in different ink] excisus [co] A. O. ♂ Loreto, Misiones 4.v.1933. A. O.”; and 1 ♂ labeled: “ Gonatocerus gracilicornis [al in different ink] excisus [co] A. O. ♂ Loreto, Misiones 4.v.1933.”. We do not designate any of these as paralectotype(s) because it is also quite likely that Ogloblin did not include them in the syntype series. The specimen collected on 8.vi.1934 was identified by him with a question mark and in fact is an undetermined species of G. (Cosmocomoidea), and the two specimens collected on 4.v.1933 were originally identified by him as a different taxon, though their collecting date does match one of his published dates for this species.
Material examined. ARGENTINA. MISIONES: Loreto: 20.iv.1948, A.A. Ogloblin [1 ♀, MLPA]; Ruinas Jesuíticas, 21–26.viii.2000, P. Fidalgo [7 ♀, 13 ♂, IMLA, UCRC]; Ruinas Jesuíticas, 28.viii.2000, P. Fidalgo [1 ♂, UCRC]; Ruinas Jesuíticas, 3–26.i.2001, S.O. Martínez, P. Fidalgo [1 ♀, IMLA]; Ruinas Jesuíticas, 26.i–20.ii.2001, S.O. Martínez, P. Fidalgo [3 ♀, UCRC]; 15.ii.2001, P. Fidalgo [1 ♀, IMLA]; 16– 30.iii.2001, P. Fidalgo [1 ♀, UCRC]. Parque Nacional Iguazú, 25.68°S 54.45°W, 200 m, B.V. Brown, G. Kung: 30.xi–2.xii.2003 [1 ♀, UCRC]; 2–7.xii.2003 [3 ♀, UCRC]. 5 km E of Puerto Iguazú, 2–7.ii.1992, S.A. Marshall [1 ♀, CNCI]. Reserva de Vida Silvestre Urugua-í, 25°58.471’S 54°06.986’W, 400 m, B.V. Brown, G. Kung: 7–9.xii.2003 [1 ♀, UCRC]; 10–12.xii.2003 [1 ♀, UCRC].
Redescription. FEMALE (lectotype, paralectotypes, and non-type specimens). Body length 960–1300 µm. Head mostly brownish except face and gena yellowish; scape, pedicel, and F1 yellowish or very light brown; F2, F3, and occasionally base or even entire F4 white (if F3 sometimes partially or completely brownish, then F4 brown), reminder of flagellum brown to dark brown; mesosoma, legs, and petiole mostly yellowish except pronotum often pale; base of gaster pale or yellowish, middle and distal terga light brown to brown.
Antenna (Figs 315, 317) with radicle about 0.3x total length of scape, rest of scape 2.6–2.9x as long as wide, faintly longitudinally striate; pedicel longer than F1; F1 short (about as long as F8 or slightly longer) and without mps; F2 without mps, about as long as or a little shorter than F3, about as long as or slightly longer than F4, and a little longer than F5–F7; F3 with 1 mps and F4–F8 each usually with 2 mps (F4 rarely with 1 mps); clava with 8 mps, 2.7–3.5x as long as wide, a little longer than combined length of F6–F8.
Mesosoma (Figs 316, 319). Mesoscutum and scutellum almost smooth; propodeum (Fig. 318) with welldeveloped, curved submedian carinae widening at and extending almost to anterior margin, smooth between them and between submedian and lateral carinae. Forewing (Figs 316, 320) 3.6–3.9x as long as wide; longest marginal seta 0.24–0.3x maximum wing width; disc notably and almost uniformly infuscate throughout (infuscation perhaps slightly more intense behind stigmal vein); mostly bare behind venation except for setae behind stigmal vein and just behind distal half or so of marginal vein, and densely setose elsewhere. Hind wing (Fig. 316) 17–22x as long as wide; disc with rows of setae along margins and a few additional, scattered setae; with a slight brownish tinge (slightly more so apically); longest marginal seta 1.8–2.8x maximum wing width.
Petiole 1.2–1.7x as wide as long; gaster a little longer than mesosoma; ovipositor about 0.7x length of gaster, not or barely exserted beyond apex of gaster; about 0.9x as long as mesotibia.
Measurements (µm) of the lectotype. Total body length: 1076; head 197; mesosoma 425; petiole 33; gaster 437; ovipositor 327. Antenna: radicle 63; rest of scape 142; pedicel 64; F1 55; F2 73; F3 79; F4 70; F5 61; F6 58; F7 57; F8 49; clava 197. Forewing 1218:338; longest marginal seta 82. Hind wing 935:43; longest marginal seta 121.
MALE (paralectotypes and non-type specimens). Body length 1025–1350 µm. Similar to female except for normal sexually dimorphic features and the following. Mesonotum slightly darker. Wings as in Fig. 322, forewing 3.6–3.7x as long as wide, usually with fewer setae behind marginal vein than in female. Antenna as in Fig. 321; genitalia as in Fig. 323.
Diagnosis. Gonatocerus (Cosmocomoidea) gracilicornis is a member of the ater subgroup of the ater species group. Females are recognizable by F2 and F3 being at least partially white (Figs 315, 317). It is most easily confused with an undescribed species of G. (Cosmocomoidea) from Buenos Aires and Misiones, Argentina, and Minas Gerais, Brazil, which has F4 of the female antenna entirely white and the apex of forewing notably more pigmented (brownish) than the rest of the forewing disc (uniformly infuscate in G. gracilicornis, Fig. 320).
Distribution. NEOTROPICAL: Argentina. Hosts. Unknown.
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 154-157, DOI: 10.5281/zenodo.894928