Gonatocerus (Gonatocerus) excisus ( Ogloblin, 1936 )

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, Zootaxa 2456, pp. 1-243 : 25-27

Gonatocerus (Gonatocerus) excisus ( Ogloblin, 1936)

( Figs 25–30 )

Lymaenon excisus Ogloblin 1936: 53 –55 + plates (láminas) II–IV (illustrations). Type locality: Loreto , Misiones, Argentina.

Gonatocerus (Gonatocerus) excisus (Ogloblin) : De Santis 1967: 104 (catalog).

Gonatocerus excisus (Ogloblin) : Yoshimoto 1990: 40 (list); Luft Albarracin et al. 2009: 9 (list; distribution in Argentina).

Lymaenon excisus Ogloblin : Loiácono et al. 2005: 13 (type information, invalid designation of paratypes).

Type material examined. Lectotype female [MLPA], here designated to avoid confusion about the status of the type specimens of this species, on slide labeled: 1. “ Gonatocerus excisus A. O. ♀ Loreto, Mis. 20.vi.1932. A. A. O. Typus!”; 2. ‘3872”; 3. [red circle] “Lectotype”. The lectotype is complete, uncleared, mounted more or less dorsoventrally. Paralectotypes [all MLPA] 1 ♀ on slide labeled: “ Gonatocerus excisus A. O. ♀ Loreto, Misiones 14.iii.1933 A. O.”; 1 ♀ on slide labeled: “ Gonatocerus excisus [ip] ♀ Loreto, Mision. 27.i.1934 ”; 1 ♀ on slide labeled: “ Gonatocerus excisus A. O. ♀ Loreto, Misiones 22.X.1933. A. O.”; 1 ♀ on slide labeled: “ Gonatocerus excisus A. O. ♀ Loreto, Misiones 19.iv.1933. A. O.”; 1 ♂ on slide labeled: “ Gonatocerus excisus A. O. ♂ Loreto, Mis. 19.iv.1933 Fig. [iR, ip] Ant genit”; 1 ♂ on slide labeled: “ Gonatocerus excisus A. O. ♂ Loreto, Misiones 18.iv.1933. A. O.”.The collection dates of the above-listed specimens match the published collection dates. Also 1 ♂ on slide labeled: 1. “ Gonatocerus excisus ♂ Loreto 19.ii 1933 A. A. O. Typus [ip]”, 2. ‘3872”; 1 ♂ on slide labeled: “ Gonatocerus excisus A. O. ♂ 15.x.1933 Loreto, Misiones A. A. O.”; 1 ♂ on slide labeled: “ Gonatocerus excisus ♂ Loreto, Misiones 15.v.1934 ”; 1 ♂ on slide labeled: “ Gonatocerus excisus [ip] ♂ Loreto, Misiones 27.v.1934.”; 1 ♀ on slide labeled: “ Gonatocerus excisus A O. [ip] ♀ Loreto, Misiones 3.vi.1934.”; 1 ♀ on slide labeled: “ Gonatocerus excisus [ip] ♀ Loreto, Misiones 21.x.1934.” [this specimen is actually not G. (Gonatocerus) excisus but an unidentified species of G. ( Cosmocomoidea )]. The collection dates of these specimens do not match the published collection dates, but we have little doubt that they were part of the original syntype series of Lymaenon excisus because Ogloblin so often listed incorrect collection dates in his publications.

Besides the female lectotype and the 6 female and 6 male paralectotypes examined, an additional 1 female (collected 25.x.1933) and 1 male (collected 4.v.1933) on slides in MLPA were invalidly designated as paratypes by Loiácono et al. (2005); however, these two specimens could not be located there – most likely the collection dates were listed incorrectly. As correctly noted by Loiácono et al. (2005), Ogloblin (1936) also confused the collecting data for the female and male types of this species: the dates for the males actually correspond to the dates for the females, and vice versa, but it seems that the type series of Ogloblin’s Lymaenon excisus did consist of 7 females and 6 males (the syntypes) as originally stated.

Material examined. ARGENTINA. CHACO, Ruta Nacional 11, S of Formosa, 27°01’44’’S 58°54’27’’W, 78 m, 26.iii.2003, J.M. Heraty [1 ♀, UCRC]. MISIONES: Loreto: 10.i.1932, A.A. Ogloblin [1 ♀, MLPA] (identified by A.A. Ogloblin as “ Gonatocerus ? ochraceous [a manuscript name]? excisus ); 17.ii.1949, A.A. Ogloblin [1 ♂, MLPA]; 27.iii.1949, [A.A. Ogloblin] [1 ♂, MLPA]; Ruinas Jesuíticas, 27°20’S, 55°31’W: 21–26.viii.2000, P. Fidalgo [4 ♀, IMLA, UCRC]; 23.viii.2000, P. Fidalgo [2 ♀, CNCI, and 3 ♀, UCRC]; 24.viii.2000, P. Fidalgo [3 ♀, IMLA, UCRC]; 25.viii.2000, P. Fidalgo [1 ♀, UCRC]; 28.viii.2000, P. Fidalgo [2 ♂, IMLA, UCRC]; 3–26.i.2001, S.O. Martínez, P. Fidalgo [2 ♀, IMLA, UCRC]; 16.i.2001, P. Fidalgo [1 ♀, UCRC]; 16–30.i.2001, P. Fidalgo [3 ♀, IMLA, UCRC]; 26.i–20.ii.2001, S.O. Martínez, P. Fidalgo [7 ♀, 1 ♂, IMLA, UCRC]; 15.ii.2001, P. Fidalgo [8 ♀, IMLA, UCRC]; 28.ii.2001, P. Fidalgo [3 ♀, IMLA, UCRC]; 19.iii.2001, P. Fidalgo [2 ♀, IMLA, UCRC]; 9.iv–9.v.2001, S.O. Martínez, P. Fidalgo [1 ♀, UCRC]; 9.v–7.vi.2001, S.O. Martínez, P. Fidalgo [1 ♀, UCRC]; 8.viii–9.ix.2001, P. Fidalgo [2 ♀, UCRC]; 27°20’12.9’’S 55°31’42.6’’W, 176 m, 16.ii.2009, D.A. Aquino, A.V. Ossipov, S.V. Triapitsyn [1 ♀, UCRC]. Parque Nacional Iguazú: Puerto Canoas, 200 m, 8.xii.1990 – 6.i.1991, S. & J. Peck [4 ♀, CNCI]; 25.68°S 54.45°W, 200 m, 2–7.xii.2003, B.V. Brown, G. Kung [2 ♀, UCRC]. 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 [2 ♀, 1 ♂, UCRC]; 10–12.xii.2003 [7 ♀, UCRC]. BRAZIL. GOIÁS, Uruaçu, 14°17.0’S 48°54.8’W, 26.v.1996, Serra da Mesa Survey [1 ♀, UCRC]. URUGUAY. CERRO LARGO, 30 km SW of Melo, 32°32’S 54°14’W, 180 m, 9–25.xii.2002, S. & J. Peck [1 ♀, CNCI].

Redescription. FEMALE (lectotype, paralectotypes, and non-type specimens from Loreto, Misiones). Body and appendages mostly light brown except vertex and occiput a little darker, flagellum and distal gastral terga (except gastral apex) brown to dark brown.

Antenna ( Fig. 25 ) with radicle about 4.5x as long as wide, rest of scape about 5.0x as long as wide, lightly striate; pedicel longer than F1; F2 longer than F1, F3–F8 subequal in length, F1–F4 slightly narrower than F5 or F6 and notably narrower than F7 or F8; F1–F4 without mps, F5 usually with but sometimes without 1 mps, F6 usually with 1 mps but sometimes without or with 2 mps, F7 and F8 each with 2 mps; clava with 8 mps, 3.0–3.3x as long as wide, slightly longer than combined length of F6–F8.

Mesosoma ( Fig. 26 ). Pronotum 2-lobed (mediolongitudinally divided), not entire as drawn in Fig. 47 by Ogloblin (1936). Dorsellum rhomboidal. Forewing ( Fig. 27 ) 3.8–4.0x as long as wide; longest marginal seta about 0.3x maximum wing width. Forewing disc infumate throughout, setose behind and beyond marginal vein. Hind wing 19–22x as long as wide; disc bare except for rows of setae along margins; longest marginal seta 2.4–2.5x maximum wing width.

Metasoma ( Fig. 26 ). Petiole short, a little wider than long, trapezoidal. Ovipositor 0.7–0.8x length of gaster, not or barely exserted beyond its apex; ovipositor length: mesotibia length ratio 0.9–1.0:1.

Measurements (µm) of the lectotype. Body: total body length (underestimated, because head length cannot be measured correctly): 923; mesosoma 400; gaster 450; ovipositor 288. Antenna: radicle 73; rest of scape 182; pedicel 73; F1 40; F2 51; F3 61; F4 61; F5 63; F6 60; F7 63; F8 61; clava 196. Forewing 1046:261; longest marginal seta 82. Hind wing 787:41; longest marginal seta 100.

MALE (paralectotypes and non-type specimens from Loreto, Misiones). Body length 904–1076 µm. Similar to female except for normal sexually dimorphic features and the following. Midlobe of mesoscutum brownish, gaster mostly dark brown except light brown basally and apically. Antenna ( Fig. 28 ) with scape minus radicle 2.3–3.3x as long as wide. Forewing ( Fig. 29 ) 3.5–3.8x as long as wide. Genitalia as in Fig. 30 .

Diagnosis. Gonatocerus (Gonatocerus) excisus is characterized by its generally light brown color with a partially dark brown gaster ( Fig. 26 ); the forewing disc is slightly infumate throughout and setose behind and beyond the marginal vein ( Figs 27 , 29 ).

Distribution. NEOTROPICAL: Argentina, Brazil *, and Uruguay *.

Hosts. Unknown.

Figures

FIGURES 25 – 27. Gonatocerus (Gonatocerus) excisus ♀ (Loreto, Misiones, Argentina): 25, antenna; 26, mesosoma and metasoma; 27, forewing.

FIGURES 28 – 30. Gonatocerus (Gonatocerus) excisus ♂ (Loreto, Misiones, Argentina): 28, antenna; 29, forewing; 30, genitalia.

FIGURES 47 – 50. Gonatocerus (Gonatocerus) perforator ♀ (Loreto, Misiones, Argentina): 47, antenna; 48, dorsellum and propodeum; 49, body; 50, forewing.