Labena pluvia Gauld, 2000

Marinho, Luana S. & Fernandes, Daniell R. R., 2025, Taxonomy of Labena Cresson, 1864 (Hymenoptera: Ichneumonidae: Labeninae) from Brazil, with description of two new species, Zootaxa 5660 (1), pp. 1-52 : 35-36

Labena pluvia Gauld, 2000

Figs. 44–45

Labena pluvia Gauld, 2000: 369 . Holotype ♀ Costa Rica (INBio) [original designation]; Yu et al. 2016 [database on flash-drive].

Material examined (1♀). BRAZIL, Pará, Bragança, / Mangue / Flight trap (1♀, MPEG) .

Diagnosis. This species can be distinguished from other Neotropical Labena species by a combination of the following characters: propodeum with an area superomedia not delineated posteriorly, broadly confluent with area dentipara, petiolaris and, postero-extena; median tibia with a longitudinal row of short setae clustered on the outer surface.

Remarks. Additional characters from the material examined from the states of Pará ( Brazil). Body length 11.6 mm, except ovipositor. Overall coloration is yellow-orange ( Figs. 44A–D ). Head ( Figs. 44B–C ). Transverse dark brown band between the occipital carina and occiput; transverse dark brown band on ocelli, extending to the side of frons. Antenna with 39 flagellomeres, measuring 8.72 mm, with cylindrical apex; flagellum light brown, flagellomeres XIX–XXIV yellow-orange. Mandible bidentate with striate base, upper tooth equal in size to lower tooth; basal width mandible 0.24 mm. Malar space width 0.15 mm. Ocellus diameter 0.50 mm; distance between anterior and posterior ocellus 0.08 mm; shortest distance between posterior ocellus and compound eye 0.18 mm; distance between posterior ocelli 0.14 mm. Compound eye length 1.35 mm. Frons slightly convex and, smooth, width 0.60 mm. Face striate, width 0.89 mm. Wing. Fore wing length 9.7 mm, hyaline with a light brown spot at apex; areolet wider than the length of distal abscissa of M, with 3rs-m same size as 2rs-m. Hind wing length is 6.17 mm. Mesosoma ( Fig. 44E ). Mesoscutum without black border, with three longitudinal black bands. Pronotum without epomia, without the upper posterior part punctate and without setae. Propleura not punctate and with sparse setae. Scuto-scutellar groove black, shallow, smooth. Scutellum slightly convex, punctate with sparse and yellow setae. Metanotum (postscutellum) with the yellow posterior part. Propodeum with anterior part with a brown transverse band; area basalis rectangular, wider than high, completely brown; area externa as wide as long, with brown spot; area dentipara without spot, confluent with area postero-externa; area postero-externa without brown spot; area petiolaris not obliterated by lateromedian longitudinal carina, without black upper part; area superomedia longer than wide, with very outlined anterior carina, posterior transverse carina absent; lateral longitudinal carina complete. Fore legs with one tibial spur, tarsomeres with fringe of apical setae; mid legs with the medially dilated tibia, with two tibial spurs and scattered thin setae on the outer surface; hind legs thin, not medially dilated, with darker tibia and tarsomeres, with two tibial spurs. Metasoma. Tergite I 1.65 mm in length, with basal width 0.31 mm and apical width 0.67 mm; tergite II 1.27 mm in length, basal width 0.75 mm and apical width 1.08 mm; tergite III 0.83 mm in length, basal width 1.12 mm and apical width 1.35 mm. Metasoma yellow-orange with tergite I yellow with a brown central spot; tergite II reddish yellow anteriorly and yellow posteriorly. Ovipositor laterally compressed, tapering apex; upper and lower valves with transverse striae.

Distribution. Costa Rica, Brazil ** (Pará*) ( Fig. 45 ) (Gauld 2000; Yu et al. 2016).

Discussion. Labena pluvia is a species that differs from all other species of the genus in having the propodeum in the posterior part forming a single area, the fore wing with a 3rs-m of the same size as 2rs-m, and rectangular area basalis. In the other Labena species, the propodeum has divisions in the posterior parts. This species belongs to the grallator species-group.

Figures

FIGURE 44. A–F. Female of Labena pluvia Gauld, 2000. A. Habitus, lateral view. B. Head, dorsal view. C. Head, front view. D. Habitus, dorsal view. E. Propodeum, dorsal view. F. Apex of ovipositor, lateral view.

FIGURE 45. Distribution of Labena pluvia Gauld, 2000 (yellow star= type locality, blue triangle= previous record, red circle= new record.