Closterocerus caelatus, 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 : 33-34

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.

Figures

Figs 59–64. Closterocerus spp. C. caelatus, holotype ♀ – (59) habitus dorsal view; (60) habitus lateral view. C. cincinnatus, non-types – (61) habitus dorsal view, ♀; (62) habitus lateral view, ♀; (63) habitus dorsal view, ♂; (64) habitus lateral view, ♂.