Labena littoralis González-Moreno & Bordera, 2015

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 : 18-20

Labena littoralis González-Moreno & Bordera, 2015

Figs. 30−31

Labena littoralis González-Moreno, Bordera & Sããksjarvi, 2015: 573 ; Yu et al. 2016 [database on flash-drive]; González-Moreno & Bordera 2017: 182-188 [record]. Holotype ♀, Mexico, (CER-UADY) [original designation].

Material examined (5♀). BRAZIL, Pará, Santarém BR 163, KM 19, Ramal das Larvas, Sítio Recanto do Sabiá , 02º35’13.0”S, 54º43’15.3”W, 15-30.VI.2019, M.L.Oliveira leg. [collectors], Arm. [Trap] Malaise grande{Gressitt & Gressitt}, Projeto Rede-BIA (1♀, INPA) ; São Paulo, Luiz Antônio, Estação Ecológica de Jataí, Mata Ciliar - Ponto I, 21º36’47’’S, 47º49’04”O, 29.IV.2009, Arm. Luminosa, R.I.R Lara e equipe cols. [collectors] (1♀, LRRP) ; same, except Ponto II, 15.IV.2009, (1♀, LRRP) ; same, except 01.x.2008 (1♀, LRRP) ; same, except 29.X.2008 (1♀, INPA) .

Diagnosis. This species can be distinguished from other Neotropical Labena species by a combination of the following characters: propodeum with an area superomedia hexagonal with black spots on the anterior transverse carina, lateromedian longitudinal carina, and lateral longitudinal carina.

Remarks. Additional characters from the material examined from the states of Pará and São Paulo ( Brazil). Body length 10.2−13.9 mm, except ovipositor. Overall coloration yellow ( Figs. 30A–D ). Head ( Figs. 30B–C ). Transverse black band between the occipital carina and occiput, extending only on the dorsal part of the head; transverse black band on ocelli, extending to the side of frons. Antenna with 46 flagellomeres, measuring 10.7−12.6 mm, with cylindrical apex; flagellum dark brown, flagellomeres I and II ventrally light brown. Mandible bidentate with striate base, upper tooth size equal to lower tooth; mandible basal width 0.38–0.45 mm. Malar space width 0.17 mm. Ocellus 0.62 mm in diameter; distance between anterior and posterior ocellus 0.13 mm; shortest distance between posterior ocellus and compound eye 0.28 mm; distance between posterior ocelli 0.30 mm. Compound eye length 2.07 mm. Face slightly convex, finely punctate with fine, sparse setae, width 1.24 mm. Face weakly striate, width 0.92 mm. Frons slightly convex, finely punctate with fine, sparse setae, width 1.24 mm. Face slightly striate, with width 0.92 mm. Wing. Fore wing length 12.48 mm, hyaline with a light brown spot at apex; areolet shorter than the length of distal abscissa of M, with 3rs-m the same size as 2rs-m. Hind wing length 8.29 mm. Mesosoma ( Fig. 30E ). Mesoscutum with black border, with three longitudinal black bands. Pronotum without epomia, with upper posterior part punctate with dense setae. Scuto-scutellar groove black, shallow, smooth. Scutellum slightly convex. Propleuron punctate with dense setae, yellow with the black posterior part. Metanotum (postscutellum) with black posterior part. Propodeum anterior part without a black transverse band; area basalis rectangular, wider than long, completely yellow; area externa as long as wide, without black diagonal spot; area dentipara without spot; area postero-externa without dark brown spot; area petiolaris not obliterated by lateromedian longitudinal carina, without black upper region; area superomedia slightly longer than wide, with anterior transverse carina very outlined, posterior transverse carina absent; lateral longitudinal carina complete. Fore legs with one tibial spur, tarsomeres with fringe of apical setae; mid legs with medially dilated tibiae, with two tibial spurs and slender setae in rows on the outer surface; hind legs slender, not medially dilated, with yellow tibiae and tarsomeres, with two tibial spurs. Metasoma. Tergite I 1.84 mm in length, basal width 0.53 mm and apical width 0.90 mm; tergite II 1.51 mm in length, basal width 1.21 mm and apical width 1.74 mm; tergite III 1.06 mm in length, basal width 2.05 mm and apical width 2.58 mm. Metasoma yellow with tergite I yellow, with a reddish-yellow central spot; tergite II anteriorly reddish-yellow and posteriorly yellow. Ovipositor laterally compressed, apex slightly tapered; upper valve with marked and sparse teeth, suavely transverse striae; lower valve with marked proximal teeth and suavely transverse striae.

Distribution. Mexico, French Guiana, Brazil ** (Pará * and São Paulo *) ( Fig. 31 ) ( González-Moreno et al. 2015; Yu et al. 2016).

Discussion. Labena littoralis can be compared to L. marginata in having propodeum with a black spot on the upper part, a pleural carina outlined with a black spot and scattered setae on the outer surface of the median tibia. However, L. litorallis differs in having the propodeum with an outer area longer than wide, area basalis very transverse, area petiolaris not defined by lateromedian longitudinal carinae or obliterated and thus confluent with the area postero-externa and area dentipara; area lateralis visibly shorter than wide, very transverse. L. marginata has a propodeum with area externa that is visibly wider than longer, area basalis longer than wide, area petiolaris defined by lateromedian longitudinal carinae or obliterated, and area lateralis almost as longer than wide, slightly transverse. This species belongs to the grallator species-group.

Figures

FIGURE 30. A–F. Female of Labena littoralis González-Moreno & Bordera, 2015. 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 31. Distribution of Labena littoralis González-Moreno & Bordera, 2015 (yellow star= type locality, blue triangle= previous records, red circle= new records).