Gonatocerus ( Gastrogonatocerus ) margiscutum Girault, 1914

Gonatocerus ( Gastrogonatocerus) margiscutum Girault, 1914 View in CoL

( Figs 106–118 View FIGURES 106 – 108 View FIGURES 109, 110 View FIGURES 111 – 113 View FIGURES 114 – 118 )

Gonatocerus margiscutum Girault 1914: 150 View in CoL –151. Type locality: San Bernardino , Paraguay . Lymaenon ( Gastrogonatocerus) dimorphus Ogloblin 1938a: 95 , 99 (illustrations), 101–105, 106 (key). Type locality: Apostoles , Misiones, Argentina. Syn. n.

Lymaenon ( Gastrogonatocerus) dimorphus Ogloblin: Ogloblin 1938b View in CoL : 29 (mentioned).

Lymaenon ( Gastrogonatocerus) monrosi Ogloblin 1959a: 185 View in CoL –188. Type locality: Bella Vista , Buenos Aires, Argentina. Syn. n.

Gonatocerus dimorphus (Ogloblin) View in CoL : Costa Lima 1962: 196; Yoshimoto 1990: 40 (listed in membraciphagus species group); Luft Albarracin et al. 2009: 9 (list; distribution and host association in Argentina).

Gonatocerus ( Gastrogonatocerus) dimorphus (Ogloblin) View in CoL : De Santis & Esquivel 1967: 100 (list); De Santis 1967: 106 (catalog).

Gonatocerus ( Gastrogonatocerus) monrosi (Ogloblin) : De Santis 1967: 106 (catalog).

Lymaenon dimorphus Ogloblin View in CoL : De Santis et al. 1973: 43 –44 (record from Curitiba, Paraná, Brazil); De Santis 1980: 148 (catalog); Loiácono et al. 2005: 13 (type information).

Gonatocerus ( Gonatocerus) margiscutum Girault View in CoL : De Santis 1979: 366 (catalog).

Gonatocerus margiscutum Girault View in CoL : Yoshimoto 1990: 40 (list).

Gonatocerus monrosi (Ogloblin) View in CoL : Yoshimoto 1990: 40 (listed in membraciphagus species group); Luft Albarracin et al. 2009: 10 (list; distribution in Argentina).

Lymaenon monrosi Ogloblin View in CoL : Loiácono et al. 2005: 17 ( type information).

Type material examined. Lectotype male of Gonatocerus margiscutum [ ZMHB], here designated to avoid confusion about the status of the type specimens of this species, on slide labeled: 1. “ Gonatocerus margiscutum Gir. ♂ types.”; 2. [red] “ Type ”; 3. “31962”. The lectotype (left specimen, circled in black ink) is poorly mounted dorsoventrally ( Fig. 115 View FIGURES 114 – 118 ), missing two apical flagellomeres of one antenna and F11 of the other antenna. One paralectotype male is under the same coverslip with the lectotype; only the body (without head), one forewing, and several legs (one detached) remain. According to Girault (1914, p. 150), the two original syntypes were remounted by him in xylol-balsam from minuten pins bearing the labels “4389. San Bernardino. K. Fiebrig S. V. IX. 9. ”.

Lectotype female of Lymaenon ( Gastrogonatocerus) dimorphus [MLPA], here designated to avoid confusion about the status of the type specimens of this species, on slide labeled: “ Gastrogonatocerus dimorphus A. O. ♀ Apostoles, Mis 16.I.1937. A. A. O. Huevos de Kronid. decumbens . [ cachleatum – co] sobre Eryngium . [Fig. – ip, iR]”. The lectotype, although not sufficiently cleared, is perfectly spread out, in a very good condition, mounted dorsoventrally. Paralectotypes [all MLPA]: 1 ♂ on the same slide and under the same coverslip with the lectotype; 1 ♀ and 1 ♂ on slide labeled: “ Gastrogonatocerus dimorphus A. O. ♀ Apostoles, Mis 16.I.1937. Huevos de Kronid. decumbens sobre Eryngium .”. Also 2 females and 2 males on slides, with the same data as the lectotype, listed as syntypes by Loiácono et al. (2005). Lymaenon ( Gastrogonatocerus) dimorphus was described from 6 female and 5 male syntypes; the whereabouts of the remaining 2 female and 1 male paralectotypes not mentioned above are unknown.

Holotype female of Lymaenon ( Gastrogonatocerus) monrosi [ MLPA], on slide labeled: 1. “ Lymaenon ♀ Gastrogonatoce-rus monrosi Det. A. Ogloblin Holotypus. Bella Vista. Pcia. B. Aires. 12.XII.1957. A. A. O.”; 2. [original label ip] “ Holotypus Gastrogonatocerus meridionalis [emn] A. O. ♀ B Vista 8.xii.57 ”; 3. “3879”. The holotype, although uncleared, is in very good condition, perfectly spread out, and mounted dorsoventrally. One paratype female [ MLPA] on slide, with the same data as the holotype except collected on 9.xii.1957, listed by Loiácono et al. (2005) as possibly belonging to the type series of this species. Lymaenon ( Gastrogonatocerus) monrosi was described from 2 females (the holotype and a paratype) and 4 male paratypes including the allotype; the whereabouts of these males are unknown.

Material examined. ARGENTINA. FORMOSA, 26.27°S 58.27°W, 60 m, 26.iii.2003, J. Munro [ 1 ♂, UCRC] GoogleMaps .

Redescription. FEMALE ( lectotype and paralectotype of G. dimorphus and holotype of G. monrosi ). Body length 867–1322 µm. Body and appendages light brown to brown, flagellum somewhat darker.

Antenna ( Figs 106 View FIGURES 106 – 108 , 110 View FIGURES 109, 110 ) with radicle about 0.2x total length of scape, rest of scape 2.6x as long as wide; pedicel longer than F1; F1–F4 short, subequal, and without mps; F5–F8 longer, subequal in length, and each with 2 mps; clava with at least 8 mps, 3.0–4.0x as long as wide, a little longer than combined length of F6–F8.

Mesosoma ( Figs 107 View FIGURES 106 – 108 , 111–113 View FIGURES 111 – 113 ). Mesoscutum and scutellum with weak sculpture; propodeum smooth; propodeal spiracle not very large although perhaps somewhat larger than normal in size. Forewing ( Figs 108 View FIGURES 106 – 108 , 109 View FIGURES 109, 110 ) 2.9–3.2x as long as wide; longest marginal seta about 0.2x maximum wing width; forewing disc almost hyaline, bare behind and just beyond venation except for 2 setae behind stigmal vein, apical 0.6 or so of disc setose. Hind wing ( Figs 108 View FIGURES 106 – 108 , 109 View FIGURES 109, 110 ) 13–15x as long as wide; disc with 2 rows of setae along margins and with a few scattered short setae, almost hyaline; longest marginal seta 1.5–1.8x maximum wing width.

Petiole much wider than long; gaster longer than mesosoma; ovipositor ( Figs 107 View FIGURES 106 – 108 , 111–113 View FIGURES 111 – 113 ) long, 2.7– 3.1x length of mesotibia, projecting strongly forward under mesosoma (at least as far as procoxa) and not exserted beyond apex of gaster.

MALE (lectotype and paralectotype of G. margiscutum and 2 paralectotypes of G. dimorphus ). Body length 1175–1298 µm. Similar to female except for normal sexually dimorphic features and the following. Antenna ( Fig. 114 View FIGURES 114 – 118 ) with scape plus radicle 2.1–2.3x as long as wide. Mesosoma as in Fig. 116 View FIGURES 114 – 118 . Forewing ( Fig. 117 View FIGURES 114 – 118 ) 2.8–3.0x as long as wide. Genitalia as in Fig. 118 View FIGURES 114 – 118 .

Measurements (µm) of the lectotype of G. margiscutum . Total body length: 1298. Antenna: scape 91; pedicel 51; F1 118; F2 121; F3 124; F4 124; F5 124; F6 121; F7 121; F8 121; F9 121; F10 116. Forewing 621:209; longest marginal seta 40. Hind wing 485:31; longest marginal seta 55.

Diagnosis. Gonatocerus ( Gastrogonatocerus) margiscutum is characterized by the following unique combination: female antenna ( Figs 106 View FIGURES 106 – 108 , 110 View FIGURES 109, 110 ) with F1–F4 short, without mps, and F5–F8 longer, subequal in length, each with 2 mps; forewing ( Figs 108 View FIGURES 106 – 108 , 109 View FIGURES 109, 110 ) hyaline, mostly bare behind and just beyond venation; and ovipositor long (2.7–3.1x as long as mesotibia), projecting strongly forward under mesosoma (at least as far as procoxa) and not exserted beyond apex of gaster ( Figs 107 View FIGURES 106 – 108 , 111-113 View FIGURES 111 – 113 ).

Distribution. NEOTROPICAL: Argentina *, Brazil * ( De Santis et al. 1973) [as Lymaenon dimorphus ], and Paraguay.

Host. Kronides incumbens (Germar) (Membracidae) ( Ogloblin 1938a [as Kronides decumbens (sic)] for Lymaenon ( Gastrogonatocerus) dimorphus ; De Santis et al. 1973 [as Kronides incumbes (sic)] for Lymaenon dimorphus ).

Comments. One small female specimen in UCRC (from Argentina, Tucumán, W of Tapia , 26°33’54’’S 65°17’22’’W, 720 m, 17–19.iii.2007, J.M. Heraty) may or may not belong to this species – it lacks mps on F6. GoogleMaps