Lathrolestes piranga

Lima, Alessandro Rodrigues & Kumagai, Alice Fumi, 2016, Lathrolestes Förster, 1869 (Hymenoptera, Ichneumonidae) from Brazil, with description of two new species and a key to the Neotropical species, Zootaxa 4170 (3), pp. 587-593 : 588-589

Lathrolestes piranga Lima & Kumagai sp. n.

( Figs 1 A‒F)

Type locality. Brazil, Minas Gerais, Belo Horizonte (Estação Ecológica UFMG).

Diagnosis. Flagellum black, with segments 10–19 white. Propodeum reddish-brown; petiolar area infuscate. Metasoma reddish-brown; anterior half of tergites II and III infuscate. area superomedia 1.6× as long as wide apically; area petiolaris as long as posterior width, apically 2.5× as wide as basally. Mandible with lower tooth virtually as long as the upper one. Fore wing vein 2rs-m 0.56× as long as abscissa of M between 2rs-m and 2m-cu. Hind wing with distal abscissa of Cu1 joining cu-a closer to M than to 1A.

Description (Holotype). Female. Mandible slender, weakly tapered beyond middle; lower tooth virtually as long as the upper one. Malar space 0.3× as long as basal mandibular width. Clypeus punctate, not clearly separated from face; in lateral view flat, with margin blunt; in anterior view 2.2× as broad as long, with margin truncate. Face transverse, 1.75× as broad as long ( Fig. 1 D). Eye in lateral view as broad as maximum breadth of gena ( Fig. 1 C). Lateral ocellus separated from eye by 1.3× its maximum diameter. Occipital carina dorsally complete, but very weak centrally, reaching base of mandible without joining hypostomal carina. Antenna with 43 flagellomeres; first flagellomere 1.18× as long as the second one.

Pronotum dorsally smooth; epomia absent. Mesoscutum polished, densely pilose, evenly rounded in lateral view; without distinct notaulus. Mesopleuron polished, pilose, except on speculum, that is smooth and glabrous. Epicnemial carina laterally extending above the level of lower corner of pronotum; its upper end remote from the anterior margin of mesopleuron. Posterior transverse carina of mesosternum reduced to lateral vestiges. Scutellum smooth and shiny; as long as anterior width; strongly convex; without lateral carina. Metapleuron weakly inflated. Submetapleural carina broad in its entire length. Propodeum in lateral view convexly rounded; fully carinate ( Fig. 1 E); posterior transverse carina on area superomedia straight; area superomedia 1.6× as long as wide apically; area petiolaris as long as posterior width, apically 2.5× as wide as basally; pleural carina complete.

Fore wing length 7.44 mm; vein cu-a reaching M+Cu opposite of Rs&M ( Fig. 1 A); 2rs-m 0.56× as long as abscissa of M between 2rs-m and 2m-cu; 2m-cu with a single bulla, joining areolet closer to 3rs-m than to 2rs-m; abscissa of Cu1 between 1m-cu and Cu1a as long as Cu1b, and the two veins subtending an angle of about 180° in the first subdiscal cell. Hind wing with first abscissa of M+Cu1 slightly arched; first abscissa of Cu1 0.85× as long as cu-a, so distal abscissa of Cu1 joining cu-a closer to M than to 1A; distal abscissa of Rs, M, Cu1 and 1A nontubular; R1 with nine hamuli.

Middle leg with inner tibial spur 1.5× as long as outer one. Tarsal claw pectinate to its apex.

Metasomal tergite I granulate; 1.4× as long as posteriorly broad in dorsal view; with lateromedian longitudinal carina extending 0.88 of its length, almost to apex ( Fig. 1 E); with lateral carina present on its entire length; glymma strongly impressed; spiracle slightly before middle. Cercus disc-like. Subgenital plate subquadrate in lateral view. Ovipositor as long as subgenital plate, basally stout, with a long shallow dorsal depression.

Head yellow, with mandible teeth, basal spot and apex of clypeus, interocellar area, occiput and a broad band joining interocellar area and occiput black; flagellum black, with segments 10–19 white. Propleuron yellow, basally infuscate; pronotum black, with a basal yellow band. Mesoscutum with broad black mesoscutal vittae, distally black; scuto-scutellar groove black. Mesopleuron reddish-yellow, with subapical black band and subalar prominence yellow. Fore and middle legs reddish-yellow, with apical tarsomeres infuscate; hind leg reddish-brown, with tarsus reddish-yellow, and apical tarsomere infuscate. Propodeum reddish-brown; petiolar area infuscate.

Metasoma reddish-brown; anterior half of tergites II and III infuscate. Wings hyaline, with distal apex of fore wing distinctly infuscate; pterostigma black.

Male. Unknown.

Comments. Lathrolestes piranga sp. n. is distinctive among neotropical species in the genus due its mandible with lower tooth virtually as long as the upper one.

Etymology. From the Brazilian Tupi piranga (reddish), this species is named in reference to its reddish-brown propodeum and metasoma.

Distribution. Lathrolestes piranga sp. n. is described from Brazil, Minas Gerais state.

Material examined. Holotype (♀). Brazil, Minas Gerais, Belo Horizonte, Campus UFMG Pampulha , Estação Ecológica , 19°52’30”S ; 43°58’20”W, 842m, 01‒08.xi.2013, Malaise {trap}. A.F.Kumagai col. [1 ♀, CCT-UFMG- IHY-1502933]

Holotype condition. Left mesotarsus is glued on a triangular label pinned with the specimen. Apart from that it is in good condition.

Figures

FIGURE 1. Lathrolestes piranga Lima & Kumagai sp. n. (Holotype) A. Female body, lateral view. B. Head and thorax, dorsal view. C – D. Head. C, lateral view; D, frontal view. E. Propodeum and tergite I, dorsal view. F. Metasoma, lateral view. Scale in millimeters.