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

description: Closterocerus oligothrix sp.nov.   
(Figs 133, 134)  
 Diagnosis. Antenna flattened, scape widest at apex (Fig. 134); flagellum dark brown with F5 white, flagellomeres with few long and erect setae attached at base (Figs 133, 134); pronotal collar without a carina along anterior margin (Fig. 133); midlobe of mesoscutum with one pair of setae (Fig. 133); fore wing hyaline with weak infuscation along apical margin and below stigmal vein (Fig. 133); length of body female 0.7–1.0mm.   
Female holotype: length of body 1.0mm.  
Antenna dark brown with F5 white. Frons golden-green. Vertex metallic bluish-purple. Mesoscutum metallic bluish-green with anterior part metallic bluish-purple. Mesoscutellum with anterior one-half metallic bluish-green and posterior one-half metallic purple. Dorsellum golden-red. Propodeum metallic purple. Legs with fore coxa with basal one-half dark brown and apical one-half white, mid coxa white, hind coxa dark brown; fore and mid femora infuscate, hind femur white with median part dark brown with metallic tinges; tarsi white. Fore wing hyaline with weak infuscation along apical margin and below stigmal vein; hind wing hyaline. Petiole dark brown. Gaster dark brown with metallic purple, green, blue and golden tinges.  
Antenna predominantly flattened, F4 less flattened and F5 not flattened, flagellomeres with few long and erect setae attached at base. Frons and vertex with strong reticulation, vertex smooth lateral to ocellar triangle. 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 one pair of setae. Mesoscutellum convex with relatively strong reticulation in anterior one-half, with very weak reticulation in posterior one-half. Dorsellum convex and smooth. Propodeum smooth, without median carina; 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; Gt smooth, remaining tergites with weak reticulation.  
 1-2   
Relative measurements: head length dorsal 15.5; head length frontal 13.5; head width 28; POL 4; OOL 3; lateral ocellus maximum width 2,2; eye length 12.5; malar space 3.5; mouth width 8; mesosoma length 29; mesosoma width 23; mesoscutellum length 13; mesoscutellum width 14; fore wing length 48; fore wing width 27; marginal vein length 24; postmarginal vein length 2.5; stigmal vein length 4; fore wing marginal fringe length 7; gaster length 36; gaster width 27.  
Variation in paratype material. Length of body: 0.7–1.0mm. Vertex metallic bluish-purple or golden-green. Mesoscutum metallic bluish-green with anterior part metallic bluish-purple or golden-green. Mesoscutellum with relatively strong reticulation in anterior one-half and very weak reticulation in posterior one-half, to smooth and shiny without reticulation. Fore wing in some paratypes with infuscate areas, especially the band along apical margin, very weak.  
Male. Unknown.  
 Hosts. Unknown.   
 Distribution. Costa Rica.   
 Material examined.   
Type material. Holotype ♀ “ COSTA RICA: Puntarenas, San Vito, Las Cruces, 8º47’N, 82º58’W, 1000- 1300m, 7-19.ii.2007, C. Hansson ” (MZLU). Paratypes (22♀, CNC, MZLU, MZUCR, NHMUK): from same locality as previous but collected 15-16.ii.2006 (1♀), 19-29.ii.2008 (1♀); 3♀ “ COSTA RICA: Puntarenas, Golfito, Estación Agujas, Sendero Corona, 245m, 23.iv.2002, J. Azofeifa ”; 1♀ “ COSTA RICA: Puntarenas, Golfito, P.N. Corcovado, Sct La Bonanza, 500m, 20.iv.2002, J. Azofeifa, LS 275700_524800, #70850”; 1♀ “ COSTA RICA: Puntarenas, P.N. Corcovado, Sirena, 5m, 8˚29’N, 83˚35’W, 19-20.ii.2004, J.S. Noyes ”; 1♀ “ COSTA RICA: Puntarenas, R.P. Karen Mogensen, 9º52′N 85º03′W, 305m, 11-21.ii.2005, C. Hansson ”; 1♀ from same locality as previous but collected 11-12.ii.2018; 1♀ “ COSTA RICA: Alajuela, P.N. Arenal, Send. Pilón, 10º27’N, 84º43’W, 26.ii.2003, J.S. Noyes ”; 1♀ “ COSTA RICA: Alajuela, 7km N Boca Tapada, Laguna Lagarto Lodge, 55m, 10˚41’N, 84˚11’W, 18-19.ii.2018, J.S. Noyes, NHM (Ent) 2018-87”; 1♀ “ COSTA RICA: Guanacaste, P.N. Santa Rosa, Bosque Humedo, 10°51’N, 85°37’W, 300m, 23.ii.2009, J.S.Noyes ”; 2♀ “ COSTA RICA: Heredia, E.B. La Selva, 75m, 10º26’N, 84º01’W, 27-28.ii.2003, J.S. Noyes ”; following same locality as previous but collected 23-24.ii.2005 (1♀), 28-29.ii.2008 (3♀); 3♀ “ COSTA RICA: Limón, R.B. Hitoy-Cerere, 100m, 9º40’N, 83º02’W, 24-25.ii.2004, J.S. Noyes ”; 1♀ from same locality as previous but collected 20-22.ii.2006.  
 Etymology. From the Greek oligos = few, and thrix = hair, seta, referring to the few erect setae on the flagellomeres.
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 65-66, DOI: 10.5281/zenodo.6464279