Closterocerus pumilus, 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 : 70-71

Closterocerus pumilus sp.nov.

( Figs 147–151 )

Diagnosis. Antenna flattened, dark brown with F5 pale brown, male F4&5 not flattened, scape widest at apex ( Fig. 149 ); flagellomeres with long setae, longer in male ( Figs 147–151 ); head strongly transverse in frontal view with frontofacial suture straight ( Fig. 150 ); pronotal collar without a carina along anterior margin ( Fig. 147 ); midlobe of mesoscutum with two pairs of relatively long and strong setae ( Fig. 147 ); fore wing hyaline with a narrow infuscate band below stigmal vein reaching to hind margin ( Figs 148, 149 ); length of body female 0.7mm, male 0.6–0.7mm. A small, dark brown, non-metallic and predominantly smooth species.

Female holotype: length of body 0.7mm.

Antenna dark brown with F5 pale brown. Head, meso- and metasoma dark brown non metallic. Legs ±infuscate with hind coxa and hind femur darker. Fore wing hyaline with a narrow infuscate band below stigmal vein, band reaching hind margin; hind wing hyaline.

Antenna flattened, flagellomeres with long setae. Frons and vertex with weak reticulation. Frontofacial suture straight. Subtorular sutures present. Occipital margin rounded.

Pronotal collar without a carina along anterior margin. Mesoscutum smooth with anterior and lateral parts with weak reticulation; notauli missing; midlobe with two pairs of setae. Mesoscutellum convex and smooth. Dorsellum convex 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 transverse and smooth. Gaster ovate; tergites smooth.

Relative measurements: head length dorsal 9.5; head length frontal 11; head width 21.5; POL 4; OOL 3; lateral ocellus maximum width 1.5; eye length 7.5; malar space 3.5; mouth width 5.5; mesosoma length 21; mesosoma width 15; mesoscutellum length 8; mesoscutellum width 9; fore wing length 37; fore wing width 19; marginal vein length 20; postmarginal vein length 1; stigmal vein length 3; fore wing marginal fringe length 8.5; gaster length 25; gaster width 14.

Male ( Figs 148, 149 ). Length of body 0.6–0.7mm. Setae on flagellomeres longer than in female; F4&5 long and narrow, not flattened. Otherwise as in female.

Hosts. Unknown.

Distribution. Costa Rica.

Material examined.

Type material. Holotype ♀ “ COSTA RICA: Puntarenas, San Vito, Las Cruces , 8º46’N, 82º57’W, 1300m, 15-16.ii.2006, J.S. Noyes ” ( NHMUK) . Paratypes: 3♂ “ COSTA RICA: Alajuela, P.N. Arenal, Send. Pilón, 10º27’N, 84º43’W, 26.ii.2003, J.S. Noyes ” ( MZLU, NHMUK) .

Etymology. From the Latin pumilus = dwarfish, little, referring to the small size of this species.

Figures

Figs 147–151. Closterocerus pumilus – (147) habitus dorsal view, holotype ♀; (148) habitus dorsal view, paratype ♂; (149) habitus frontal-lateral view, paratype ♂; (150) head frontal view, holotype ♀; (151) holotype ♀ habitus lateral view.