Closterocerus angustipennis, 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 : 21-22

Closterocerus angustipennis sp.nov.

( Figs 2 , 30–33 )

Diagnosis. Antennal flagellum yellowish-white, not flattened, scape narrow ( Figs 30–33 ); pronotal collar without a carina along anterior margin ( Figs 30–33 ); mesoscutum and mesoscutellum with strikingly different colours ( Figs 30, 32 ); midlobe of mesoscutum without setae ( Figs 30, 32 ); fore wing hyaline with area below stigmal vein weakly infuscate, narrow with a long marginal fringe, length of longest seta in marginal fringe/fore wing width = 0.6, and with speculum open below and towards base of wing ( Figs 2 , 30–32 ); legs white, hind coxa infuscate at base ( Figs 31, 33 ); male gaster dark brown with a white spot in anterior part ( Fig. 32 ); length of body female 0.6–0.9mm, male 0.5–0.8mm.

Female holotype: length of body 0.9mm.

Antenna with pedicel and flagellum yellowish-white, scape pale brown. Frons with lower one-half dark brown, upper one-half metallic pale blue. Vertex metallic purple in anterior one-half, metallic blue in posterior one-half. Mesoscutum, dorsellum and propodeum metallic bluish-purple; mesoscutellum golden-red. Legs white, hind coxa infuscate at base. Fore wing hyaline with area below stigmal vein weakly infuscate, hind wing hyaline. Petiole black with metallic tinges. Gaster metallic bluish-purple with a large dark brown non-metallic median spot.

Antenna not flattened, scape narrow with dorsal and ventral margins ±parallel-sided. Frons with strong reticulation. Vertex with strong reticulation; with a short groove medio-posteriorly. Frontofacial suture V-shaped. Subtorular sutures present. Occipital margin rounded.

Pronotal collar without a carina along anterior margin. Mesoscutum with strong reticulation; notauli distinct almost throughout, missing close to mesoscutellum; midlobe without setae. Mesoscutellum flattened, with strong reticulation. Dorsellum convex with strong sculpture. Propodeum smooth and shiny; callus with two setae. Fore wing narrow with a long marginal fringe; speculum open below and towards base of wing; with a stigmal hairline and with radial cell bare.

Petiole very short, just a narrow band. Gaster short ovate; all tergites with strong reticulation.

Relative measurements: head length dorsal 11; head length frontal 14.5; head width 21; POL 4.5; OOL 1,7; lateral ocellus maximum width 1.5; eye length 12; malar space 3; mouth width 6.5; mesosoma length 24; mesosoma width 16; mesoscutellum length 9; mesoscutellum width 10; fore wing length 37; fore wing width 14.5; marginal vein length 18; postmarginal vein length 1,7; stigmal vein length 3.5; fore wing marginal fringe length 9; gaster length 26; gaster width 17.

Variation in paratype material. Length of body: 0.6–0.9mm.Antennal flagellum yellowish-white, yellowish-white with F5 infuscate, to completely infuscate. Mesoscutellum golden-red or golden.

Male ( Figs 32, 33 ). Length of body: 0.5–0.8mm. Antenna white to pale orange. Gaster dark brown with a white spot in anterior part. Otherwise as in female.

Hosts. Unknown.

Distribution. Costa Rica, Ecuador.

Material examined.

Type material. Holotype ♀ “ COSTA RICA: Limón, R.B. Barbilla, 550m, 9˚59’N, 83˚27’W, 18.ii.2006, J.S. Noyes ” ( NHMUK) . Paratypes (53♀, 108♂, CNC, MZLU, MZUCR, NHMUK) : 2♀ “ COSTA RICA: Limón, R.B. Hitoy-Cerere, 100m, 9˚40’N, 83˚02’W, 14-18.i.1991, J.S. Noyes ” ; 2♀ from same locality as previous but collected 20-22.ii.2006 ; 1♂ “ COSTA RICA: Limón, Pococi, P.N. Braulio Carrillo, Estación Quebrada Gonzalez , 10º09’N, 83º57’W, 400-500m, 24.ix.2002, Hanson & Godoy” ; 3♀, 1♂ “ COSTA RICA: Alajuela, R.F. Rincon, Estación Caribe , 10º53’N, 83º18’W, 19-20.ii.2003, J.S. Noyes ” ; 1♀, 9♂ “ COSTA RICA: Alajuela, P.N. Arenal, Send. Pilón , 10º27’N, 84º43’W, 26.ii.2003, J.S. Noyes ” ; 1♀ 2♂ “ COSTA RICA: Alajuela, P.N. Arenal, Send. Ceibo , 10º27’N, 84º41’W, 22-23.ii.2016, J.S. Noyes, NHM (Ent) 2016-79” ; 15♀, 26♂ “ COSTA RICA: Heredia, E.B. La Selva , 75m, 10º26’N, 84º01’W, 27-28.ii.2003, J.S. Noyes ”; following from same locality as previous but collected 30.iii.2001 (1♀), 30-31.iii.2002 (2♀, 1♂), 23-24.ii.2005 (6♀, 20♂), 28-29.ii.2008 (3♂), 22-24.ii.2012 (1♂) ; 1♀ “ COSTA RICA: Puntarenas, R.P. Karen Mogensen , 9º52′N 85º03′W, 305m, 11-21.ii.2005, C. Hansson ”; following from same locality as previous but collected 14-15.ii.2005 (10♀, 25♂), 17-18.ii.2011 (4♀, 10♂), 23-24.ii.2013 (2♀), 19-20.ii.2016 (1♀, 1♂), 11-12.ii.2018 (1♀) ; 1♀, 7♂ “ COSTA RICA: Puntarenas, P.N. Piedras Blancas, Estación El Bonito , 100m, 8˚43’N, 83˚13’W, 13-14.ii.2012, J.S. Noyes, NHM(Ent) 2012-91” . 1♀ “ ECUADOR: Napo, 10km NE Tena , 400m, 19-20.ii.1983, L. Masner ” ; 1♂ “ ECUADOR: Pichin, Tinalandia , 850m, 2.ii.1983, Masner & Sharkey” .

Etymology. From the Latin angustus = narrow and penna = wing, referring to the narrow fore wing.

Figures

Fig. 2. Closterocerus angustipennis, habitus dorsal view, ♀ paratype. Length of specimen 0.7mm.

Figs 30–35. Closterocerus spp. C. angustipennis – (30) habitus dorsal view, paratype ♀; (31) habitus lateral view, holotype ♀; (32) habitus dorsal view, paratype ♂; (33) habitus lateral view, paratype ♂. C. brillante, holotype ♀ – (34) habitus dorsal view; (35) habitus lateral view.