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

description: Closterocerus caelatus sp.nov.   
(Figs 59, 60)  
 Diagnosis. Antenna flattened, scape widest slightly below apex (Fig. 60); pronotal collar with a carina along anterior margin (Fig. 59); midlobe of mesoscutum with two pairs of strong setae (Fig. 59); mesoscutellum with engraved reticulation (Fig. 59); dorsellum concave; fore wing hyaline with a large infuscate spot below stigmal vein (Figs 59, 60); stigmal vein elongate, 3.7× as long as wide and postmarginal vein 1.2× as long as stigmal vein (Fig. 59); hind tarsus white (Fig. 60); petiole as long as wide with sculpture on dorsal surface; length of body female 1.8mm.   
Female holotype: length of body 1.8mm.  
 Antenna dark brown. Head with frons golden-green; vertex metallic bluish-purple. Mesoscutum and propodeum metallic bluish-green. Mesoscutellum and dorsellum golden-green. Coxae and femora dark brown with metallic tinges; tibiae and tarsi white. Fore wing hyaline with a large infuscate spot below stigmal vein, hind wing hyaline. Petiole black with metallic tinges. Gaster with Gt 1-2 metallic bluish-green, remaining tergites dark brown with metallic tinges.   
Antenna flattened, scape widest slightly below apex. Frons and vertex with strong reticulation, vertex smooth lateral of ocellar triangle. Frontofacial suture V-shaped. Subtorular sutures absent. Occipital margin rounded.  
Pronotal collar with a carina along anterior margin. Mesoscutum with strong reticulation; notauli distinct in anterior one-half; midlobe with two pairs of strong setae. Mesoscutellum flat, with strong engraved reticulation. Dorsellum concave and smooth. Propodeum smooth without median carina; callus with two setae. Fore wing speculum closed; without a stigmal hairline and with radial cell hairy.  
 Petiole as long as wide with strong sculpture on dorsal part. Gaster ovate; Gt 1-2 smooth, remaining tergites with weak reticulation.   
Relative measurements: head length dorsal 20; head length frontal 26; head width 41; POL 7; OOL 4; lateral ocellus maximum width 3.5; eye length 21.5; malar space 6; mouth width 10; mesosoma length 60; mesosoma width 39; mesoscutellum length 23; mesoscutellum width 23; fore wing length 90; fore wing width 55; marginal vein length 48; postmarginal vein length 12; stigmal vein length 10; fore wing marginal fringe length 4; gaster length 61; gaster width 39.  
Male. Unknown.  
 Hosts. Unknown.   
 Distribution. Costa Rica.   
 Material examined.   
Type material. Holotype ♀ “ COSTA RICA: Puntarenas, Buenos Aires, Cerro Frantzius, 2134m, 12.iii-12. iv.2001, D. Rubí, MT, LS 574800_334750, #62125” (NHMUK).  
 Etymology. From the Latin caelatus = engraved, referring to the engraved sculpture on mesoscutellum.   
 Comments. This species has some odd features for a Closterocerus: a long postmarginal vein, radial cell hairy, but since it has a flattened antenna and infuscate pattern in fore wing it is provisionally placed here.
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 33-34, DOI: 10.5281/zenodo.6464279