Gonatocerus (Cosmocomoidea) barbos Triapitsyn

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 : 111-114

Gonatocerus (Cosmocomoidea) barbos Triapitsyn , sp. n.

( Figs 203–210 )

Gonatocerus new sp. near morrilli (Howard) : Hoddle & Triapitsyn 2004: 339; Hoddle & Triapitsyn 2005: 341–342; Triapitsyn 2007: 59.

Gonatocerus sp. near morrilli (Howard) [from Mexico]: Hoddle & Stouthamer 2005: 338 –339; Triapitsyn 2006b: 112; Triapitsyn et al. 2007: 62.

Type material. Holotype female [UCRC ENT 151715] on slide: MEXICO. VERACRUZ, Tuxpan (South Bank), 20°56.919’N 97°24.424’W, 2.iii.2005, L. Pilkington (emerged in University of California, Riverside Quarantine 16.iii.2005 from an egg mass of Oncometopia sp. on hibiscus leaf, S&R # 05–01–03 –A; colony founder, exposed to eggs of Homalodisca vitripennis (Germar) on Euonymus japonica leaves on 16.iii.2005 by V.V. Berezovskiy and S.V. Triapitsyn; preserved 1.iv.2005). Paratypes: COSTA RICA. LIMÓN, Roxana de Pococí, 100 m, ix–x.2007, P. Benavides (from eggs of Oncometopia clarior (Walker) on Dracaena marginata ) [9 ♀, 5 ♂ on points, CNCI (4 ♀, 2 ♂), MZCR (3 ♀, 2 ♂), UCRC (2 ♀, 1 ♂)]. MEXICO. VERACRUZ: E of Naranjos, 13.ii.2001, G. Simmons, A. Ríos (emerged in University of California, Riverside Quarantine from an egg mass of? Oncometopia sp. on an unknown plant, S&R # 01–02–06, preserved by V.V. Berezovskiy and S.V. Triapitsyn) [1 ♂ on slide, UCRC]. Tuxpan (North Bank), 20°57.050’N 97°24.947’W, 2.iii.2005, L. Pilkington (emerged in University of California, Riverside Quarantine 22.iii.2005 from an egg mass of? Oncometopia sp. on hibiscus leaf, S&R # 05–01–04, preserved by V.V. Berezovskiy and S.V. Triapitsyn) [1 ♀ on slide, UCRC] (mesosoma and metasoma of this specimen are missing). USA. CALIFORNIA, Riverside Co., Riverside, from colony at University of California, Riverside Quarantine (emerged 5.iv.2005 from eggs of H. vitripennis on Euonymus japonica leaves, preserved 6.iv.2005 by V.V. Berezovskiy and S.V. Triapitsyn); first generation progeny of the colony founders from: MEXICO, VERACRUZ, Tuxpan (North Bank), 20°57.050’N 97°24.947’W, 2.iii.2005, L. Pilkington (emerged in University of California, Riverside Quarantine 17.iii.2005 from an egg mass of Oncometopia sp. on hibiscus leaf, S&R # 05–01–04, exposed to host eggs on 21.iii.2005 by V.V. Berezovskiy and S.V. Triapitsyn) [1 ♀, 1 ♂ on slides, UCRC].

Description. FEMALE (holotype and paratypes from Mexico or of Mexican origin). Head ( Fig. 204 ) and mesosoma mostly yellow, with some orange and light brown on mesonotum, trabeculae dark brown; gaster yellowish with a narrow transverse dark band on third tergum; legs yellowish except metatibia grayish or light brown; scape and pedicel light brown, F5 brownish basally and whitish apically, F6 white, remainder of funicle segments and clava dark brown.

Antenna ( Fig. 203 ) with radicle 0.3–0.32x total length of scape, rest of scape 3.0–3.2x as long as wide, slightly longitudinally striate; pedicel slightly shorter than F1; F1 notably shorter than F2 (either the longest segment or subequal in length to F3), following funicle segments each a little shorter than preceding one; mps on F2 (0 or 2), F3 (1 or 2), F4 (2), F5 (2), F6 (2), F7 (2), and F8 (2); clava with 8 mps, 3.5–3.7x as long as wide, about as long as combined length of F6–F8.

Mesosoma. Propodeum ( Fig. 205 ) with median oval area bounded by well-developed submedian carinae almost smooth and relatively wide (about 2x as long as wide) and with several transverse rugae lateral to submedian carinae in posterior half only. Forewing ( Fig. 206 ) 3.5–3.6x as long as wide; longest marginal seta about 0.2x maximum wing width; disc mostly hyaline except for a brownish spot at wing’s posterior margin just beyond venation, bare behind venation except for 1–4 setae just behind stigmal vein. Hind wing ( Fig. 206 ) 16–17x as long as wide; disc mostly bare except for rows of setae along margins and a few setae in an incomplete row just beyond venation and sometimes a few scattered setae at apex, hyaline; longest marginal seta 1.5–1.6x maximum wing width.

Gaster about as long as mesosoma. Petiole about 1.4x as long as wide, a little narrower basally than apically. Ovipositor about 0.7x length of gaster, not or just barely exserted beyond its apex; ovipositor length: mesotibia length ratio about 0.9:1.

Measurements (µm) of the holotype. Mesosoma 726; petiole 127; gaster 738; ovipositor 517. Antenna: radicle 106; rest of scape 227; pedicel 73; F1 79; F2 123; F3 116; F4 112; F5 100; F6 91; F7 88; F8 76; clava 277. Forewing 1660:461; longest marginal seta 91. Hind wing 1255:76; longest marginal seta 120.

Body length of the female paratypes from Costa Rica 1390–1585 µm.

MALE (paratypes from Mexico or of Mexican origin). Similar to female except for normal sexually dimorphic features and the following. Body a little darker, with parts of mesonotum and most of gaster light brown to brown; flagellum dark brown. Antenna ( Fig. 207 ) with scape about 2.7x as long as wide. Dorsellum and propodeum as in Fig. 208 . Forewing ( Fig. 210 ) 3.3–3.4x as long as wide, disc hyaline, without a brownish spot at wing’s posterior margin just beyond venation. Genitalia as in Fig. 209 .

Body length of the male paratypes from Costa Rica 1480–1520 µm.

Diagnosis. Gonatocerus (Cosmocomoidea) barbos sp. n. is a member of the morrilli subgroup of the ater species group and is recognized by the female antenna ( Fig. 203 ) with F6 entirely white and F5 brownish basally and whitish apically. It is most similar to G. (Cosmocomoidea) morrilli (Howard) , G. (Cosmocomoidea) walkerjonesi Triapitsyn , and G. (Cosmocomoidea) annulicornis (Ogloblin) , but F5 of their female antenna is entirely white. Another similar species, G. (Cosmocomoidea) kiskis sp. n., has F5 of the female antenna entirely brownish ( Fig. 356 ). Hoddle & Stouthamer (2005) showed using molecular methods that G. barbos [as Gonatocerus sp. near morrilli (Howard) from Mexico] is genetically different from both G. morrilli and G. walkerjonesi [as G. sp. near morrilli CA].

Etymology. The species name (a noun in apposition) is treated as an arbitrary combination of letters.

Hosts. Oncometopia clarior (Walker) and Oncometopia sp(p). (natural hosts), as well as Homalodisca vitripennis (Germar) (factitious, laboratory host) ( Cicadellidae ). A colony of G. (Cosmocomoidea) barbos had been maintained in the University of California, Riverside Quarantine Laboratory on eggs of H. vitripennis for several generations before it was discontinued during the winter of 2006 due to an inadequate supply of the host material.

Figures

FIGURES 203 – 206. Gonatocerus (Cosmocomoidea) barbos ♀ (203, 204, 206 – paratype, Tuxpan, Veracruz, Mexico; 205 – holotype): 203, antenna; 204, head; 205, dorsellum and propodeum; 206, wings.

FIGURES 207 – 210. Gonatocerus (Cosmocomoidea) barbos ♂ (paratypes, 207, 208 — E of Naranjos, Veracruz, Mexico; 209, 210 — Tuxpan, Veracruz, Mexico): 207, antenna; 208, dorsellum and propodeum; 209, genitalia; 210, forewing.

FIGURES 356 – 359. Gonatocerus (Cosmocomoidea) kiskis ♀ (holotype): 356, antenna; 357, dorsellum and propodeum; 358, mesosoma and metasoma; 359, forewing.