Closterocerus byrrus, 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 : 32-33

Closterocerus byrrus sp.nov.

( Figs 195, 196 )

Diagnosis. Antenna flattened, scape widest in apical part ( Fig. 196 ); pronotal collar without a carina along anterior margin ( Fig. 195 ); midlobe of mesoscutum with strong reticulation in anterior one-half and weak reticulation in posterior one-half, and with two pairs of long and strong setae ( Fig. 195 ); mesoscutellum golden-red with very weak reticulation, almost smooth ( Fig.195 ); fore wing hyaline with a narrow infuscate band below stigmal vein, reaching to hind margin, and with apical margin weakly infuscate ( Figs 195, 196 ); coxae pale brown, fore and mid femora white, hind femur dark brown ( Fig. 196 ); petiole about as long as wide and smooth; gaster elongate ( Fig. 195 ), 3.1× as long as wide; length of body female 1.4mm.

Female holotype: length of body 1.4mm.

Antenna dark brown. Frons golden-green. Vertex metallic bluish-green in anterior one-half, golden-green in posterior one-half. Mesoscutum with midlobe metallic bluish-green, sidelobes metallic bluish-purple; mesoscutellum golden-red; dorsellum golden-green. Propodeum dark brown with metallic tinges. Legs with coxae pale brown; fore and mid femora white, hind femur dark brown; tibiae white; tarsi infuscate. Fore wing hyaline with a narrow infuscate band below stigmal vein, reaching to hind margin, and with apical margin weakly infuscate, hind wing hyaline. Petiole dark brown. Gastral tergite 1 metallic bluish-green, remaining tergites dark brown with metallic purple and green tinges.

Antenna flattened, scape widest in apical part. Frons with weak reticulation below frontofacial suture, with strong reticulation above suture. Vertex with strong reticulation in anterior one-half, with weak reticulation in posterior one-half. Frontofacial suture V-shaped. Subtorular sutures dark and difficult to see. Occipital margin rounded.

Pronotal collar without a carina along anterior margin. Mesoscutum with midlobe with strong reticulation in anterior one-half and weak reticulation in posterior one-half, sidelobes with strong reticulation; notauli distinct in anterior one-half; midlobe of mesoscutum with two pairs of long

and strong setae. Mesoscutellum with very weak reticulation, almost smooth. Dorsellum convex and smooth. Propodeum smooth and shiny; callus with two setae. Fore wing with speculum closed; with an indistinct stigmal hairline and with radial cell bare.

Petiole about as long as wide and smooth. Gaster elongate; tergites smooth and shiny.

Relative measurements: head length dorsal 13; head length frontal 18.5; head width 29; POL 6; OOL 2.5; lateral ocellus maximum width 2; eye length 14; malar space 5.5; mouth width 6.5; mesosoma length 36; mesosoma width 24; mesoscutellum length 14; mesoscutellum width 14; fore wing length 69; fore wing width 43; marginal vein length 32; postmarginal vein length 6; stigmal vein length 5.5; fore wing marginal fringe length 4; gaster length 61; gaster width 20.

Male. Unknown.

Hosts. Unknown.

Distribution. Costa Rica.

Material examined.

Type material. Holotype ♀ “ COSTA RICA: Limón, Valle de Silencio , 2460m, 20.ix-5.x.2003, D. Rubí et al., LS340258/577465” ( NHMUK).

Etymology. From the Latin byrrus = red, flame-coloured, referring to the colour of mesoscutellum.

Figures

Figs 195–199. Closterocerus spp. C. byrrus, holotype ♀ – (195) habitus dorsal view; (196) habitus lateral view. C. albicrus, holotype ♀ – (197) habitus dorsal view; (198) habitus lateral view. C. purpureus, holotype ♀ – (199) habitus dorsal view (excluding head). The image of C. purpureus (type no. 5.1299) are ©The Trustees of the Natural History Museum, London, and made available to you under Creative Commons License 4.0 (https://creativecommons.org/licenses/by/4.0/).