Euplectrus pallidigaster, Hansson & Schmidt, 2018

Hansson, Christer & Schmidt, Stefan, 2018, Revision of the European species of Euplectrus Westwood (Hymenoptera, Eulophidae), with a key to European species of Euplectrini, Journal of Hymenoptera Research 67, pp. 1-35 : 12-13

Euplectrus pallidigaster sp. n.

Figures 23-26 , 54

Material.

Holotype female labelled "FRANCE: B du Rhone [possibly meaning "Bouches-du-Rhone], Fonscolombe, 20.vii.1979 ", in NHM . Paratypes (20♀ 8♂): FRANCE (17♀ 8♂, in NHM, MZLU, leg. M.W.R. de V. Graham ): following from same locality as holotype but collected 13.vii.1984 (1♀), 1.viii.1984 (1♀), 24.vi.1986 (1♀), 1.vii.1986 (1♀), 10.vii.1986 (1♀), 17.vii.1986 (1♀); 4♀ "FRANCE: Drome , Le Poet-en-Percip, (2), 3.viii.1990 ", 1♂ from same locality but collected 21.viii.1990; 1♀ 2♂ "FRANCE: Gard, Causse de Blandas , (2), 8.viii.1984 "; 1♀ "FRANCE: Gard, Estezargues, nr. Remoulins, on elm leaf, 23.vi.1977 "; 1♂ "FRANCE: Vaucluse, Beauregard, nr Gigondas, 19.ix.1989 "; 1♀ "FRANCE: Vaucluse, nr Bèdoin, (1), 20.vii.1981 ", following from same locality but collected 11.vii.1980 (1♀), 15.vii.1981 (2♂), 22.vii.1981 (1♀), 28.vii.1981 (1♂); 2♀ "FRANCE: Vaucluse , Mt Ventoux , Col de Perrache, (2), 6.viii.1979 "; 1♂ "FRANCE: Vaucluse , Mt Ventoux, about Rte. de Perrache, (3), 11.viii.1976 " . ITALY (2♀): 1♀ "ITALY, Malcesine , 200-300m, 23.4.1977, leg. V. Vikberg " (MZH); 1♀ "ITALIA: Varazze , nr Genova, 4.IX.71, Bouček” (NHM) . SPAIN (1♀): "SPAIN: Barcelona , Calella d. Costa, VI.1971, Bouček” (NHM) .

Diagnosis.

Frons with clypeal area yellowish-brown (Figs 23 , 24 ); scutellum with engraved reticulation, meshes ± isodiametric (Fig. 54 ); without a groove between scutellum and dorsellum (Fig. 54 ); female gaster dark yellowish-brown with anterolateral corners dark (Fig. 25 ), in some specimens also with a round black spot in medioposterior part (Fig. 26 ).

Description

(holotype female). Length of body 1.9 mm, female paratypes 1.6-2.6 mm. Antenna yellowish-brown, flagellomeres 4-6 slightly darker than scape and pedicel. Mandibles and palpi yellowish-white. Head black and shiny, with clypeal area yellowish-brown (Fig. 23 ). Face and median part of frons smooth, remaining part of frons with weak reticulation, close to eyes with two rows of setae (Fig. 23 ). Vertex smooth and shiny. Occipital margin with a carina behind ocellar triangle.

Mesosoma black and shiny; midlobe with raised and strong reticulation, meshes slightly transverse, midlobe of mesoscutum with a weak median groove in posterior ⅓ (Fig. 54 ). Scutellum 1.0 × as long as wide; with engraved reticulation, meshes slightly elongate, except smooth and shiny posterior margin (Fig. 54 ). Without groove between scutellum and dorsellum (Fig. 54 ). Propodeum smooth and shiny medially, with weak reticulation laterally (Fig. 54 ); anteromedially with a semicircular cup that is raised in posterior part; propodeal callus with 10 setae. Legs yellowish-brown. Forewing: costal cell with two irregular rows of setae on ventral surface, and margin with five setae close to marginal vein; with 13 admarginal setae.

Gaster circular, dark yellowish-brown with anterolateral corners dark brown (Fig. 25 ).

Ratios. HE/MS/WM = 2.1/1.2/1.0; POL/OOL/POO = 8.0/4.3/1.0; OOL/DO = 1.6; WE/WF/WH/HH = 1.0/2.4/4.2/3.1; WH/WT = 1.0; PM/ST = 1.7; TS1/TS2/LT/LT1/LT2/LT3/LT4 = 4.1/2.9/6.9/2.3/1.4/1.0/1.3; LP/WP = 0.8; MM/LG = 1.3.

Variation.

Several female paratypes have a dark round spot posteromedially on gaster (Fig. 26 ).

Male. Length of body 1.7-2.5 mm. Scape slightly enlarged, widest medially, with sensory pores along entire ventral margin. Similar to female except scutellum with ± isodiametric meshes, and gaster with posterior ½ dark brown.

Ratios. LC/WS = 2.7-2.9, LP/WP = 1.0-1.1.

Hosts.

Unknown.

Distribution.

France, Italy, Spain.

Etymology.

From the Latin pallidus, meaning pale, referring to the predominantly pale gaster in female.

Genetic data.

No specimens of the species were available for genetic analysis.

Figures

Figures 17 - 26. Euplectrus spp.: 17 - 19 E. geometricida sp. n., paratypes 17 head frontal, female 18 head frontal, male 19 gaster dorsal, female 20 - 22 E. carinifer sp. n., paratypes 20 head frontal, female 21 head frontal, male 22 gaster dorsal, female 23 - 26 E. pallidigaster sp. n., paratypes 23 head frontal, female 24 head frontal, male 25 gaster dorsal, female 26 gaster dorsal, female.

Figures 52 - 56. Euplectrus spp. 52 - 54 mesosoma dorsal, female 52 E. geometricida sp. n. 53 E. carinifer sp. n. 54 E. pallidigaster sp. n. 55 - 56 mesoscutum, female, a = width of base of midlobe, b = width of base of sidelobe 55 E. bicolor (Swederus) 56 E. intactus (Walker).