Gonatocerus (Cosmocomoidea) nasutus ( Ogloblin, 1939 )

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 : 187-189

Gonatocerus (Cosmocomoidea) nasutus ( Ogloblin, 1939)

( Figs 389–392 )

Lymaenon nasutus Ogloblin 1939: 244 –246 + plate (lámina) V (illustrations). Type locality: Loreto , Misiones, Argentina.

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

Gonatocerus nasutus (Ogloblin) : Yoshimoto 1990: 40 (list); Luft Albarracin et al. 2009: 10 (list; distribution in Argentina).

Lymaenon nasutus Ogloblin : Loiácono et al. 2005: 17 (types incorrectly listed as being presumably lost).

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 nasutus A. O. 1939 [ip] ♀ Loreto, Misiones 15.iv.1936. A O. Solanum auriculatum . [an illegible short word ip] Typus [ip]”; 2. ‘3860”; 3. A red circle. The lectotype, although insufficiently cleared, is in good condition, perfectly spread out and mounted dorsoventrally. Paralectotype: 1 ♀ [MLPA] on slide labeled: “ Gonatocerus nasutus A. O ♀ Loreto, Misiones 12.iv.1936. A. O Solanum auriculatum . Paratyp [ip]”.

Material examined. ARGENTINA. MISIONES, Loreto : 16.i.2001, P. Fidalgo [1 ♀, UCRC] ; Ruinas Jesuíticas , 26.i–20.ii.2001, S.O. Martínez, P. Fidalgo [1 ♀, UCRC] ; 15.ii.2001, P. Fidalgo [1 ♀, IMLA]; 19.iii.2001, P. Fidalgo [1 ♀, UCRC].

Redescription. FEMALE (lectotype, paralectotype, and non-type specimens). Body length 1010–1210 µm. Head mostly yellow except eyes dirty pink, ocelli brown, and trabeculae dark brown; scape mostly light brown, pedicel brown, flagellum dark brown; mesosoma yellow-orange, legs mostly yellowish except metatibia light brown to brown; metasoma mostly yellowish except for one contrastingly brown band on tergum in the middle of gaster.

Head higher than long (face notably longer than wide), with gena and lateral face swollen, appearing as projecting forward in lectotype, paralectotype, and some other dorsoventrally slide-mounted specimens but not projecting in dry-mounted specimens [therefore, head normal, not prognathous as incorrectly originally described]. Antenna ( Fig. 389 ) with radicle 0.3–0.4x total length of scape, rest of scape 2.9–3.3x as long as wide, faintly longitudinally striate; pedicel longer than F1; F1 without mps, a little shorter than F2 when F2 lacks a mps or much shorter than F2 when F2 bears a mps, F3–F6 more or less subequal in length, F7 and F8 slightly shorter, F3–F8 each usually with 2 mps (F3 occasionally with just 1 mps); clava with 8 mps, 3.3–3.8x as long as wide, usually a little longer than or occasionally about as long as combined length of F6–F8.

Mesosoma ( Fig. 391 ). Mesoscutum and scutellum almost smooth; propodeum ( Fig. 390 ) without traces of submedian carinae, smooth. Forewing ( Fig. 392 ) 3.4–3.5x as long as wide; longest marginal seta about 0.25x maximum wing width or a little less; disc almost hyaline (at most with a slight brownish tinge), usually bare behind venation (at most with 1–3 setae just behind stigmal vein) and just beyond venation at anterior margin of wing, and densely setose elsewhere. Hind wing 15–16x as long as wide; disc with a row of setae along each margin and a few additional short setae, almost hyaline but with a slight brownish tinge apically; longest marginal seta 1.5–1.7x maximum wing width.

Petiole 1.2–1.4x as wide as long; gaster longer than mesosoma; ovipositor 0.6–0.75x length of gaster, not exserted beyond gastral apex; 0.9–1.1x as long as mesotibia.

Measurements (µm) of the lectotype. Total body length: 1070; mesosoma 406; petiole 30; gaster 464; ovipositor 336. Antenna: radicle 79; rest of scape 164; pedicel 62; F1 36; F2 44; F3 58; F4 58; F5 60; F6 58; F7 52; F8 50; clava 179. Forewing 935:277; longest marginal seta 70. Hind wing 726:46; longest marginal seta 80.

MALE. Unknown.

Diagnosis. Gonatocerus (Cosmocomoidea) nasutus is a member of the bucculentus subgroup of the ater species group. The lack of setae behind the marginal vein on the forewing ( Fig. 392 ) differentiates it from G. (Cosmocomoidea) inauditus (Ogloblin) , which is also light colored and has a smooth propodeum with at most traces of submedian carinae.

Distribution. NEOTROPICAL: Argentina.

Hosts. Unknown.

Figures

FIGURES 389 – 392. Gonatocerus (Cosmocomoidea) nasutus ♀ (Loreto, Misiones, Argentina): 389, antenna; 390, dorsellum and propodeum; 391, mesosoma and metasoma; 392, forewing.