Closterocerus platycerus Hansson 2022, sp.nov.
Creators: name: Hansson, Christer
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Eulophidae
Closterocerus
Closterocerus platycerus

description: Closterocerus platycerus sp.nov.   
(Figs 135, 141, 142, 214, 225, 235)  
 Diagnosis. Antenna flattened, scape widest at apex (Figs 142, 225); upper frons with an edge separating it from vertex (Fig. 235); pronotal collar with a carina along anterior margin (Fig. 141); mesoscutum and mesoscutellum with very weak reticulation and shiny (Fig. 141); midlobe of mesoscutum without setae (Fig. 141); fore wing infuscate with basal one-half and two subapical spots hyaline, speculum open below (Figs 142, 214); hind tarsus with T1 infuscate, T2–4 white (Fig. 142); petiole as long as wide; gaster circular (Fig. 141); length of body female 1.4–1.7mm, male 1.1mm.   
Female holotype: length of body 1.6mm.  
Antenna dark brown to black. Frons golden-green. Vertex metallic bluish-purple. Mesoscutum metallic bluish-green with posterior one-half of midlobe golden-red. Mesoscutellum metallic blue with anteromedian one-half golden-red. Dorsellum metallic bluish-purple. Propodeum metallic purple. Coxae, femora and hind tibia dark brown; fore and mid tibiae infuscate; fore tarsus infuscate, mid tarsus white, hind tarsus with T1 infuscate, T2–4 white. Fore wing infuscate with basal one-half and two spots close to apical margin hyaline; hind wing hyaline. Petiole black. Gaster with Gt 1-2 metallic bluish-purple, remaining tergites dark brown.  
Antenna flattened, scape widest at apex. Frons with strong reticulation; frontofacial suture Vshaped; part above suture with distinct margin separating it from vertex. Vertex with strong reticulation in anterior one-half, posterior one-half with very weak reticulation, partly smooth. Subtorular sutures missing. Occipital margin with an edge behind ocellar triangle.  
Pronotal collar with a carina along anterior margin. Mesoscutum and mesoscutellum with very weak reticulation and shiny; notauli distinct in anterior one-half; midlobe of mesoscutum without setae. Dorsellum convex and smooth. Propodeum with a median carina in posterior two-thirds, otherwise smooth; callus with two setae. Fore wing speculum open below; with a stigmal hairline and with radial cell bare.  
Petiole as long as wide, with strong sculpture on dorsal surface. Gaster circular.  
Relative measurements: head length dorsal 21; head length frontal 24; head width 40; POL 6; OOL 4,4; lateral ocellus maximum width 3; eye length 19.5; malar space 6.5; mouth width 11; mesosoma length 52; mesosoma width 34; mesoscutellum length 20; mesoscutellum width 20; fore wing length 80; fore wing width 42; marginal vein length 50; postmarginal vein length 2; stigmal vein length 5; fore wing marginal fringe length 6; gaster length 47; gaster width 40.  
Variation in paratype material. Length of body: 1.4–1.7mm. Vertex metallic bluish-purple, golden-green, or with anterior one-half metallic purple and posterior one-half metallic bluish-green.  
Male (Fig. 135). Length of body 1.1mm. Entire vertex with very weak reticulation and metallic purple. Otherwise as in female.  
 Hosts. Unknown.   
 Distribution. Costa Rica.   
 Material examined.   
Type material. Holotype ♀ “ COSTA RICA: Alajuela, Peñas Blancas, 700m, 18.viii.1986, L. Masner ” (CNC). Paratypes (2♀ 1♂, MZLU. NHMUK): 1♂ “ COSTA RICA: Alajuela, P.N. Arenal, La Peninsula, 10˚27’N, 84˚45’W, 600m, 25.ii.2003, J.S. Noyes ”; 1♀ “ COSTA RICA: Alajuela, P.N. Arenal, 10˚28’N, 84˚45’W, 617m, 21-28.ii.2005, C. Hansson ”; 1♀ “ COSTA RICA: Alajuela, San Carlos, Sendero Pilón, 650m, 6-14.xi.2000, G. Carballo, LN 458050_269200, #60086”.  
 Etymology. From the Greek platys = broad, flat and keras = horn, antenna, referring to the flattened antenna.
description: Published as part of Hansson, Christer, 2022, Eulophidae Of Costa Rica (Hymenoptera: Chalcidoidea), 4 The Genus Closterocerus Westwood S. Str., pp. 1-137 in Taxonomic Monographs on Neotropical Hymenoptera (Oxford, England) (Oxford, England) 1 (1) on pages 68-69, DOI: 10.5281/zenodo.6464279