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

description: Closterocerus nitidulus sp.nov.   
(Figs 127, 136, 212, 222, 232)  
 Diagnosis. Antenna with scape and pedicel flattened, flagellum only slightly flattened, scape ±triangular and widest at apex (Figs 136, 222); setae on vertex and on mesoscutellum long and strong, 3× as long as maximum width of lateral ocelli (Fig. 232); pronotal collar without a carina along anterior margin (Fig. 127); midlobe of mesoscutum without setae (Fig. 127); mesoscutum and mesoscutellum shiny, with very weak reticulation (Fig. 127); fore wing hyaline with median one-third infuscate (Figs 127, 212); hind tarsus white (Fig. 136); length of body female 1.0– 1.3mm.   
Female holotype: length of body 1.2mm.  
 Antenna with scape, pedicel and F1–3 dark brown, F4–5 white with weak infuscations. Frons golden-green. Vertex metallic bluish-purple in anterior one-half, metallic bluish-green in posterior one-half. Mesoscutum with midlobe golden and sidelobes metallic purple. Mesoscutellum and dorsellum metallic bluish-purple. Propodeum golden-green. Coxae, femora and hind tibiae dark brown; fore and mid tibiae white; fore tarsus infuscate, mid and hind tarsi white. Fore wing hyaline with median one-third infuscate; hind wing hyaline. Petiole dark brown. Gaster with Gt 1&6 metallic bluish-green, remaining tergites dark brown with metallic purple tinges.   
Scape and pedicel flattened but flagellum only slightly flattened, scape widest at apex. Frons and vertex with strong reticulation. Frontofacial suture V-shaped. Subtorular sutures present. Occipital margin rounded.  
Pronotal collar without a carina along anterior margin. Mesoscutum and mesoscutellum shiny with very weak reticulation, partly smooth; notauli distinct in anterior one-half; midlobe of mesoscutum without setae. Dorsellum convex and smooth. Fore wing speculum closed; with a stigmal hairline and with radial cell bare.  
Petiole very short, just a narrow band. Gaster short ovate, almost circular.  
Relative measurements: head length dorsal 17; head length frontal 21.5; head width 33; POL 4,8; OOL 3; lateral ocellus maximum width 3; eye length 18; malar space 4; mouth width 8; mesosoma length 38; mesosoma width 27; mesoscutellum length 14.5; mesoscutellum width 16; fore wing length 64; fore wing width 36; marginal vein length 32; postmarginal vein length 1.5; stigmal vein length 5.5; fore wing marginal fringe length 6.5; gaster length 37; gaster width 31.  
Variation in paratype material. Length of body: 1.0– 1.3mm. Mesoscutum with midlobe golden and sidelobes metallic purple, or dark brown with metallic purple tinges, or midlobe bright metallic bluish-green. Mesoscutellum metallic bluish-purple, metallic purple, or golden-red with lateral and posterior margins metallic bluish-green. Propodeum golden-green or metallic purple.  
Male. Unknown.  
 Hosts. Unknown.   
 Distribution. Costa Rica.   
 Material examined.   
Type material. Holotype ♀ “ COSTA RICA: Heredia, La Selva Biological Station, 50m, ii.1991, J.S. Noyes ” (NHMUK). Paratypes (39♀, CNC, MZLU, MZUCR, NHMUK): following from same locality as holotype but collected iv.1991 (2♀), 2.i.1996 (1♀), iii.1996 (1♀); 1♀ “ COSTA RICA: Alajuela, Cordillera Tilaram, Peñas Blancas, 700m, xii.1986, E. Cruz ”; 1♀ from same locality as previous but collected 9.i.1987; 6♀ “ COSTA RICA: Alajuela, San Carlos, Sendero Pilón, 650m, 9.ix-22.xi.1999, G. Carballo, LN 457900_269100”; following from same locality as previous but collected 22.xii.1999 - 7.iv.2000 (3♀), 4.viii-7.xii.2000 (5♀), 5.iii-20. iv.2001 (2♀); 1♀ “ COSTA RICA: Alajuela, Estación Pilón, 10º43’N, 85º59’W, 12-18.ii.2004, C. Hansson & J.A. Azofeifa ”; 1♀ “ COSTA RICA: Cartago, Turrialba, R. Dantas, 0.4 Km Aguas Arriba Margen Derecho, 400-500m, 6.ii-10.iii.2000, E. Rojas, LN 218100/593650, #55294”; 1♀ “ COSTA RICA: Guanacaste, ACG, Estación Pitilla, 10º59’N, 85º25’W, 700m, 4-7.i.2001, R. Thomas, C. Moraga ”; 1♀ from same locality as previous but collected 22-30.i.2001; 2♀ “ COSTA RICA: Limón, R.B. Hitoy-Cerere, 100m, 9˚40’N, 83˚02’W, 24-26.ii.2008, J.S. Noyes ”; following from same locality as previous but collected 17.v-17.vii.1999 (3♀), 22-23.ii.2010 (3♀); 1♀ “ COSTA RICA: Limón, Pococí, P. N. Braulio Carrillo, Estación Quebrada González, 400-500m, 24.ix.2002, P. Hanson & C. Godoy, LN 238380/543100, #71291”; 1♀ “ COSTA RICA: Limón, 16km W Guapiles, 400m, iii.1989, Paul Hanson”; 1♀ from same locality as previous but collected iv-v.1989; 1♀ “ COSTA RICA: Limón, 4km NE Bribri, 50m, i-iii.1990, P. Hanson ”; 1♀ “ COSTA RICA: San José, P.N. Braulio Carrillo, 9.5km E tunel. 1000m, x-xii.1989, P. Hanson ”.  
 Etymology. From the Latin nitidulus = shiny, referring to the shiny thoracic dorsum.
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 63-64, DOI: 10.5281/zenodo.6464279