Microterys nederlandicus Japoshvili, 2022

Japoshvili, George & Soethof, Rudy, 2022, New records of Encyrtidae (Hymenoptera: Chalcidoidea) from the Netherlands with a description of new species, Zootaxa 5155 (4), pp. 549-563 : 552-555

8. Microterys nederlandicus Japoshvili sp. n.

( Figs. 4a–h )

Diagnosis. Female (length about 1.3mm): Body generally black, with metallic sheen; scape dark brown; funicle with first 2 segments more or less brown, rest of segments mostly yellow, with outer aspect of F3 light brown, and outer aspects of F4 and F6 infuscated; clava dark brown; fore coxa with dark spot on the base of dorsal side; mid and hind coxa dark brown; scape a little less than twice as long as broad; pedicel a little less than twice as long as broad, F1 a little shorter than pedicel; frontovertex 0.4× as wide as head width; fore wing about 2.3× as long as broad; fore wing hyaline, with 1 paler band, which is in very slight contrast with densely setose parts; ovipositor slightly exserted, about 0.9× as long as mid tibia; gonostylus about 0.8× as long as mid tibial spur.

Male. unknown.

Female (holotype): length, including ovipositor, 1.33mm; excluding ovipositor, 1.27mm (CPD). ( Figs. 4a–c )

Head black, Frontovertex in the area of ocelli with green-golden metallic lustre, head anterior of ocelli and genae with violet-silver metallic lustre; cuticle immediately adjacent to compound eye smooth with green-golden reflection; radicle and scape dark brown; basal half of pedicel dark brown, apical half lighter; first two funicular segments light brown; F3-6 dusky yellow, with outer aspect of F3 light brown, and outer aspects of F4 and F6 infuscated. ( Fig. 4a–c ); mesosoma dark brown to black with green, gold and violet metallic reflections; pronotum, mesoscutellum and tegulae with violet metallic reflection; mesoscutum, and axilla with mostly greenish metallic reflection; first tergite of gaster, with greenish-violet sheen laterally; midpart of gaster dorsally smoother and shinier than first tergite; fore coxa yellow, slightly darker at the base; midcoxa dark brown with yellow apex; hind coxa completely dark brown; midfemur with faint dark spot laterally near the joint with the coxa; hind femur brown with yellow near joints with coxa and tibia; hind tibia yellow near joint with femur and with a dark brown region subbasally, shading to yellow in its apical half; forewing hyaline, densely setose and therefore appearing darker in distal half, and with distinct curved hyaline band just beyond the stigmal vein formed by smaller, lighter-colored setae; stigmal vein 0.7× as long as forewing; hind wing hyaline.

Frontovertex above scrobes with regular, reticulate sculpture of mesh size clearly not less than eye facet size, ocellar area and face with similar, but more irregular sculpture;; genae and temple with more irregular, reticulate to imbricate-reticulate sculpture; ocellar angle about 100°; occipital margin sharp, more or less carinate; eye reaching occipital margin, and without setae; frontovertex with numerous setae which are at least 2× as long as eye facet; scrobes shallow, ˄-shaped, almost meeting dorsally; antenna as in Fig. 4d , malar suture distinct; mandible ( Fig. 4f ) with 2 distinct teeth, followed by a slightly wavy truncation, first tooth acutelly pointed, second tooth blunt and rounded;. Relative measurements: HW 76, FV 31, FVL 34, OD 5, POL 15, OOL 4, OCL 5, AOL 9, EL 40, MS 25, SL 35, SW 16, FWL 230, FWW 90; HWL135, HWW 40. Thorax with fine, raised, fairly regular, polygonally reticulate to imbricate-reticulate sculpture on mesoscutum and mesoscutellum of slightly larger mesh size than that on frontovertex; mesoscutellum evenly, slightly convex in profile and with more prominent sculpture than the mesoscutum; setae on mesoscutum about 2× as long as those on frontovertex and distinctly stouter; posterior pair of setae on mesoscutellum about 2.5× as long as those on mesoscutum; mesopleuron not quite touching base of gaster; mid tibia with setae uniform throughout, without a patch of conspicuously denser setae laterally; fore wing with venation and setation as in Fig. 4g ; propodeum with 11 or 12 setae adjacent to spiracle. Hypopygium reaching about 0.8× along gaster; ovipositor about 0.9× as long as mid tibia; ovipositor slightly exserted, the exserted part about 0.08× as long as gaster; gonostylus about 0.8× as long as mid tibial spur; outer plates about 2.8× as long as width. Relative measurements: OL 68, GL 15 [MT 75].

Male. Unknown.

Variation. Only holotype examined.

Hosts. Unknown.

Distribution. Netherlands

Material examined: Type material. Holotype: Montferland-Bergherbosch, 51.886, 6.196, sweeping net, 1 female, 31.10.2020, Leg. Rudy Soethof.

Holotype deposited in Naturalis Biodiversity Center , Museum and research in Leiden, the Netherlands.

Comments. Microterys nederlandicus sp. n. is very similar to some other Microterys species, but differs by the characters given in Table 1 .

Etymology. The species is named after Nederland, which is Dutch name of Netherlands, where the holotype was collected.

Figures

FIGURE 4. a–h: Microterys nederlandicus sp. n., female. a, dorsal habitus; b, ventral habitus; c, lateral habitus; d, antennae; e, mesosoma; f, mandible; g, wings; h, ovipositor.