Erythmelus (Erythmelus) fidalgoi S. Triapitsyn, 2007

Triapitsyn, Serguei V., Berezovskiy, Vladimir V., Hoddle, Mark S. & Morse, Joseph G., 2007, A review of the Nearctic species of Erythmelus (Hymenoptera: Mymaridae), with a key and new additions to the New World fauna, Zootaxa 1641 (1), pp. 1-64 : 46-47

Erythmelus (Erythmelus) fidalgoi S. Triapitsyn , sp. n.

( Figs 65, 66 )

Type material. Holotype female on slide [ MLPA]: ARGENTINA. LA RIOJA, Santa Cruz (near Anillaco), 1700 m, 6.xi–5.xii.2001, P. Fidalgo . Paratypes: ARGENTINA. LA RIOJA , Santa Cruz (near Anillaco), 1700 m: 6.xi–5.xii.2001, P. Fidalgo [1 female on slide, UCRC]; 31.xii.2002, P. Fidalgo [2 females on slides, IMLA, UCRC] .

Description. FEMALE (holotype and paratypes). Body length 707–812 µm. Body mostly brown to dark brown except borders of axilla and scutellum, and sometimes dorsellum light brown; midlobe of mesoscutum with a yellow transverse submedian stripe. Appendages light brown to brown.

Vertex transversely striate, with a few short setae.

Antenna ( Fig. 65 ) with short setae. Scape 5.3–6.4 x as long as wide; pedicel much longer than F1; all funicular segments more than 2 x as long as wide; F1 the shortest funicular segment, F2–F5 subequal in length and each much shorter than F6; F1–F5 without longitudinal sensilla, F6 with 2 longitudinal sensilla; clava 4.6–5.3 x as long as wide, with 5 longitudinal sensilla.

Mesosoma. Each lobe of pronotum with several strong setae. Mesoscutum wider than long, its midlobe finely longitudinally striate and with 1 pair of strong setae. Axillar seta extending to less than 3/10 length of scutellum. Scutellum about as long as mesoscutum, posterior scutellum finely longitudinally striate. Dorsellum narrowly angulate posteriorly.

Wings. Forewing ( Fig. 66 ) 5.3–5.8 x as long as wide; blade slightly infumate behind venation but otherwise more or less hyaline, with scattered setae (leaving bare areas) mostly in the distal 2/5; longest marginal cilia 1.6–2.0 x greatest width of wing. Hind wing 17–18 x as long as wide, about as long as forewing; blade slightly infumate distally; longest marginal cilia 4.2–4.7 x greatest wing width.

Metasoma. Petiole wider than long. Gaster longer than mesosoma; ovipositor 3/5–7/10 length of gaster, usually notably exserted beyond apical gastral tergum (by 1/8–1/4 of ovipositor length) and at least a little exserted beyond apex of hypopygium, 1.6–1.7 x length of metatibia.

Measurements of holotype (in µm). Body 812; mesosoma 270; gaster 400; ovipositor 281. Antenna: scape (including radicle) 152; pedicel 48; F1 24; F2 33; F3 36; F4 36; F5 36; F6 60; clava 136. Forewing 497:86; longest marginal cilia 175. Hind wing 497:27; longest marginal cilia 127.

MALE. Unknown.

Etymology. This species is named after Patricio Fidalgo who collected the type series.

Diagnosis. Member of the flavovarius species group. Among the species of the nominate subgenus that have long funicular segments of the female antenna and lack longitudinal sensilla on F4, E. (E.) fidalgoi is characterized by a moderately long ovipositor (ovipositor length: metatibia length ratio 1.6–1.7:1), which is usually notably exserted beyond the apical gastral tergum (by 1/8–1/4 of ovipositor length) and at least a little exserted beyond apex of the hypopygium. The forewing is 5.3–5.8 x as long as wide, and the longest marginal cilia are 1.6–2.0 x greatest forewing width. Erythmelus (E.) fidalgoi is most similar to E. (E.) gak sp. n. from Chile, which has a relatively wider forewing (4.5–4.8 x as long as wide, longest marginal cilia 1.4–1.5 x greatest forewing width), whose blade is significantly more setose in the distal 2/5 ( Fig. 64 ).

Hosts. Unknown.

Figures

FIGURES 65, 66. Erythmelus (E.) fidalgoi (female, holotype). 65. Antenna. 66. Forewing. Scale bars = 0.1 mm.

FIGURES 63, 64. Erythmelus (E.) gak (female, holotype). 63. Antenna. 64. Forewing. Scale bars = 0.1 mm.