Closterocerus aureolus, Hansson, 2022

Hansson, Christer, 2022, Eulophidae Of Costa Rica (Hymenoptera: Chalcidoidea), 4 The Genus Closterocerus Westwood S. Str., Taxonomic Monographs on Neotropical Hymenoptera (Oxford, England) 1 (1), pp. 1-137 : 25-26

Closterocerus aureolus sp.nov.

( Figs 43–45 )

Diagnosis. Antenna flattened, scape widest at apex ( Fig. 43 ); pronotal collar with a weak carina along anterior margin ( Fig. 43 ); midlobe of mesoscutum with two pairs of setae ( Fig. 43 ); fore wing strongly infuscate with a hyaline band close to apical margin and with area below basal two-thirds of marginal vein hyaline ( Figs 44, 45 ); hind tarsus with T1–3 white, T4 pale brown ( Fig. 44 ); petiole as long as wide with strong sculpture dorsally; length of body female 1.1mm, male 1.2–1.4mm.

Female holotype: length of body 1.1mm.

Antenna dark brown. Frons dark brown with metallic tinges. Vertex metallic purple. Mesoscutum with midlobe golden and sidelobes metallic purple. Mesoscutellum golden with lateral and posterior margin metallic bluish-purple. Dorsellum with metallic blue tinges. Propodeum with golden and golden-green tinges. Coxae and femora dark brown; fore tibia whitish, mid and hind tibiae dark brown; tarsi with T1–3 white, T4 pale brown. Fore wing strongly infuscate with a hyaline band close to apical margin and with area below basal two-thirds of marginal vein hyaline; hind wing hyaline. Petiole dark brown. Gaster with Gt 1 golden medially and metallic purple laterally, remaining tergites dark brown with metallic tinges.

Antenna flattened, scape widest at apex. Frons with strong reticulation; frontofacial suture Vshaped. Vertex with strong reticulation in anterior one-half, smooth in posterior one-half. Subtorular sutures present. Occipital margin rounded.

Pronotal collar with a weak carina along anterior margin. Mesoscutum and mesoscutellum with strong reticulation; notauli distinct in anterior one-half; midlobe of mesoscutum with two pairs of setae. Dorsellum flat with weak sculpture. Propodeum with strong sculpture in posterior two-thirds and smooth in anterior one-third; callus with two setae. Fore wing speculum closed; with a stigmal hairline and with radial cell bare.

Petiole as long as wide with strong sculpture dorsally. Gaster short ovate; Gt 1-2 smooth, remaining tergites with weak reticulation.

Relative measurements: head length dorsal 13; head length frontal 18; head width 30; POL 6; OOL 3.5; lateral ocellus maximum width 2; eye length 13.5; malar space 6.5; mouth width 7.5; mesosoma length 37; mesosoma width 25; mesoscutellum length 15; mesoscutellum width 14; fore wing length 55; fore wing width 34; marginal vein length 29; postmarginal vein length 1.5; stigmal vein length 4.5; fore wing marginal fringe length 8.5; gaster length 37; gaster width 25.

Male ( Fig. 45 ). Length of body 1.2–1.4mm. Fore tibia with basal one-half dark brown and apical one-half white, to predominantly dark brown. Propodeum dark brown non-metallic. Otherwise similar to female.

Hosts. Unknown.

Distribution. Ecuador, Peru.

Material examined.

Type material. Holotype ♀ “ ECUADOR: Pichin , 10km N. Guayllabamba, 26.ii.1983, Masner & Sharkey” ( CNC) . Paratypes 3♂ “ PERU: Ollantaytambo , 19.xii.1983, L. Huggert ” ( MZLU) .

Etymology. From the Latin aureolus = golden, glittering, referring to the colour of thoracic dorsum.

Figures

Figs 41–46. Closterocerus spp. C. atrifasciatus, holotype ♀ – (41) head frontal view; (42) habitus lateral view. C. aureolus – (43) habitus dorsal view, holotype ♀; (44) habitus lateral view, holotype ♀; (45) habitus dorsal view, paratype ♂. C. aureopurpureus, paratype ♀ – (46) habitus dorsal view.