Closterocerus barbatus, 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 : 29

Closterocerus barbatus sp.nov.

( Figs 52 , 58 )

Diagnosis. Scape and pedicel flattened, flagellum less flattened, scape subtriangular and widest just below apex, apical three flagellomeres ±fused to form a clava ( Fig. 58 ); occiput strongly hairy ( Fig. 52 ); pronotal collar long and smooth, with a strong carina along anterior margin ( Fig. 52 ); midlobe of mesoscutum with one pair of setae ( Fig. 52 ); mesoscutum and mesoscutellum with strong engraved reticulation ( Fig. 52 ); petiole 0.5× as long as wide with strong sculpture on dorsal surface; fore wing hyaline with median one-third infuscate ( Fig. 52 ), speculum large and open below and towards base of wing; gaster with tuft of white hairs anterolaterally ( Fig. 52 ); length of body female 1.9mm.

Female holotype: length of body 1.9mm.

Colour: Scape and pedicel dark brown to black, flagellum pale brown. Frons below frontofacial suture golden-green, above suture golden, close to vertex metallic purple. Vertex golden. Mesoscutum, mesoscutellum, dorsellum and propodeum black. Coxae black; femora, mid and hind tibiae dark brown, fore tibia brown with apex yellowish-brown; fore tarsus dark brown; mid and hind tarsi with T1–3 white, T4 black. Fore wing hyaline with median one-third infuscate, hind wing hyaline. Petiole black. Gaster dark brown.

Head: Scape and pedicel flattened, flagellum less flattened, scape ±triangular and widest just below apex. Frons below frontofacial suture with weak reticulation; above suture and vertex smooth. Frontofacial suture V-shaped. Subtorular sutures missing. Occipital margin rounded. Occiput strongly hairy.

Pronotal collar long and smooth, with a strong carina along anterior margin. Mesoscutum with strong and engraved reticulation; notauli distinct in anterior one-half; midlobe with one pair of setae, attached in posterior part. Mesoscutellum convex, with strong and engraved reticulation. Dorsellum convex and predominantly smooth. Propodeum with a ±complete median carina; medially smooth and laterally with rather strong reticulation; callus with two setae. Fore wing with speculum large, open below and towards base of wing; with a stigmal hairline and with radial cell bare.

Petiole 0.5× as long as wide, with strong sculpture on dorsal surface. Gaster oval-shaped and non-collapsed; with a tuft of white hair anterolaterally; tergites with strong reticulation.

Relative measurements: head length dorsal 17; head length frontal 27.5; head width 42; POL 9; OOL 4; lateral ocellus maximum width 3; eye length 18.5; malar space 9; mouth width 12; mesosoma length 65; mesosoma width 43; mesoscutellum length 26; mesoscutellum width 28; fore wing length 111; fore wing width 59; marginal vein length 60; postmarginal vein length 1.5; stigmal vein length 6.5; fore wing marginal fringe length 7.5; gaster length 64; gaster width 53.

Male. Unknown.

Hosts. Unknown.

Distribution. Ecuador.

Material examined. Type material. Holotype ♀ “ ECUADOR: Napo, Papallacta , 3700m, 25.ii.1983, L. Huggert ” ( MZLU)

Etymology. From the Latin barbatus = bearded, referring to the hairy temples and occiput.

Figures

Figs 47–52. Closterocerus spp. C. aureopurpureus, paratype ♂ – (47) habitus dorsal view; (48) habitus lateral view. C. azofeifai – (49) habitus dorsal view, holotype ♀; (50) habitus lateral view, holotype ♀; (51) habitus lateral view, paratype ♂. C. barbatus, holotype ♀ – (52) habitus dorsal view.

Figs 53–58. Closterocerus spp. C. brevipes – (53) habitus dorsal view, holotype ♀; (54) habitus lateral view, holotype ♀; (55) habitus dorsal view, paratype ♂; (56) habitus lateral view, paratype ♂; (57) hind leg, holotype ♀. C. barbatus, holotype ♀ – (58) head frontal view.