Closterocerus crassicornis, 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 : 41-42

Closterocerus crassicornis sp.nov.

( Figs 79, 80 )

Diagnosis. Antennal flagellum not flattened but thick, pedicel and scape slightly flattened, scape not expanded at apex ( Figs 79, 80 ); pronotal collar without a carina along anterior margin ( Fig. 79 ); midlobe of mesoscutum with four pairs of relatively short setae and with strongly curved notauli in anterior one-half ( Fig. 79 ); fore wing hyaline with area below stigmal vein infuscate ( Fig. 80 ); legs predominantly dark brown ( Fig. 80 ); length of body female 1.5mm.

Female holotype: length of body 1.5mm.

Antenna dark brown. Frons golden-green. Vertex with anterior one-half metallic purple, posterior one-half metallic bluish-green. Mesoscutum, mesoscutellum and dorsellum metallic bluish-green. Propodeum metallic bluish-green on median part, metallic purple on lateral parts. Coxae, femora and hind tibia dark brown, fore and mid tibiae with basal one-half dark brown and apical one-half pale brown; fore and hind tarsi dark brown, mid tarsus with T1 whitish and T2–4 pale brown. Fore wing hyaline with area below stigmal vein infuscate, hind wing hyaline. Petiole black with metallic tinges. Gaster with Gt 1,6 metallic bluish-green, Gt 2-5 dark brown with sides metallic bluish-green, Gt 7 dark brown.

Antennal flagellum not flattened but thick, pedicel and scape slightly flattened. Frons with strong reticulation. Vertex with strong reticulation. Frontofacial suture V-shaped. Subtorular sutures present. Occipital margin rounded.

Pronotal collar without a carina along anterior margin. Mesoscutum with strong reticulation; notauli distinct in anterior one-half; midlobe with four pairs of relatively short setae. Mesoscutellum flat, with relatively weak reticulation. Dorsellum convex and smooth. Propodeum smooth and shiny; callus with two setae. Fore wing speculum closed; with a stigmal hairline and with radial cell bare.

Petiole very short, just a narrow band. Gaster ovate; all tergites with weak reticulation.

Relative measurements: head length dorsal 17.5; head length frontal 23; head width 33.5; POL 7; OOL 3; lateral ocellus maximum width 2.5; eye length 15.5; malar space 6; mouth width 8; mesosoma length 44; mesosoma width 28; mesoscutellum length 17; mesoscutellum width 15.5; fore wing length 68; fore wing width 38; marginal vein length 35; postmarginal vein length 2; stigmal vein length 6; fore wing marginal fringe length 4.5; gaster length 47; gaster width 30.

Male. Unknown.

Hosts. Unknown.

Distribution. Guatemala.

Material examined.

Type material. Holotype ♀ “ GUATEMALA: Departamento Zacapa, 5km NW San Lorenzo , 12.vii.1986, L. LeSage ” ( CNC).

Etymology. From the Latin crassus = thick, and cornu = horn (equals antenna), referring to the thick antennal flagellum.

Figures

Figs 77–82. Closterocerus spp. C. concinnus – (77) habitus dorsal view, holotype ♀; (78) habitus lateral view, paratype ♀. C. crassicornis, holotype ♀ – (79) habitus dorsal view; (80) habitus lateral view. C. crinitus, holotype ♀ – (81) habitus dorsal view; (82) habitus lateral view.