Euplectrus intactus Walker, revised status

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 : 16-17

Euplectrus intactus Walker, revised status

Figures 27-29 , 49 , 56

Euplectrus intactus Walker, 1872a:102. Lectotype female in NHM, examined. Synonymized with E. bicolor by Bouček & Askew, (1968: 15).

Material

(26♀ 18♂). Belgium: 3♀ 3♂ (ZSM), this material includes 3♀ 3♂ from Pieris rapae ; France : 1♀ 2♂ (NHM), this material includes 2♂ from a caterpillar on Artemisia vulgaris ; Hungary : 2♀ 9♂ (MZLU, NHM); Romania : 1♀ (NHM); Sweden : 7♀ 1♂ (MZLU, NHM); United Kingdom : 12♀ 5♂ (NHM), this material includes 1♀ from Noctua comes on Corylus avellana .

Diagnosis.

Frons below level of toruli with pale area not extending laterally to the eye but with a wide dark stripe between pale area and eye in both sexes (Figs 27 , 28 ); midlobe of mesoscutum usually without median groove or carina (Fig. 49 , 56 ) (sometimes with a weak median groove at very base); posterior part of midlobe mesoscutum wide (Fig. 56 ), ratio width base of midlobe (a)/width base of sidelobe (b) = 0.80 ± 0.048 (female), 0.80 ± 0.054 (male), width base of midlobe/width base of entire mesoscutum = 0.29 ± 0.018 (female), 0.28 ± 0.014 (male), n=9 for female and male respectively. Very similar to E. bicolor , distinguished from this species by the wide posterior part of midlobe of mesoscutum.

Hosts.

Noctuidae : Noctua comes Hübner on Corylus avellana . Pieridae : Pieris rapae (L.). From an unidentified caterpillar on Artemisia vulgaris .

Distribution.

France (Corsica) ( Walker 1872a), Belgium, Hungary, Romania, Sweden, United Kingdom (new/confirmed records).

Remarks.

Euplectrus intactus was synonymized with E. bicolor by Bouček and Askew (1968), but DNA-data and a renewed analysis of the morphology both support that these are different species.

Genetic data.

Barcoded specimens of Euplectrus intactus exhibited an intraspecific variation of 6.9% and a pronounced geographic subclustering (NJ-tree, Suppl. material S2). One of the nine different haplotypes in E. intactus was recorded from four countries (specimens with BIN BOLD:ACR7308 from Hungary and Romania, Sweden and the UK, Fig. 63 ). The other eight haplotypes were recorded from a single country each. More than one haplotype occurs in Sweden (four haplotypes), Belgium (two haplotypes), and Hungary (three haplotypes). As in the other Euplectrus species with high haplotype divergence, a broader sampling from different populations and geographic regions is required to clarify the status of different haplotypes of the species.

Figures

Figure 63. Neighbour-joining tree of Euplectrus, with colours indicating different Barcode Index Numbers (BINs). For a fully resolved tree with additional terminal taxa information, including sequence length and country of origin, see Suppl. material S 2.

Figures 27 - 35. Euplectrus spp.: 27 - 29 E. intactus (Walker) 27 head frontal, female 28 head frontal, male 29 gaster dorsal, female 30 - 32 E. maculiventris Westwood 30 head frontal, female 31 head frontal, male 32 gaster dorsal, female 33 - 35 E. flavipes (Fonscolombe) 33 head frontal, female 34 head frontal, male 35 gaster dorsal, female.

Figures 48 - 51. Euplectrus spp., mesosoma dorsal, female: 48 E. bicolor (Swederus) 49 E. intactus (Walker) 50 E. maculiventris Westwood 51 E. flavipes (Fonscolombe).

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).