Closterocerus iomus, 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 : 56-57

Closterocerus iomus sp.nov.

( Figs 112–115 )

Diagnosis. Antenna flattened, scape widest at apex ( Fig. 113 ); upper border of frons ±distinct ( Fig. 113 ); pronotal collar with a carina along anterior margin ( Fig. 112 ); midlobe of mesoscutum without setae ( Fig. 112 ); propodeal callus with four setae; petiole as long as wide with strong sculpture on dorsal surface; hind tarsus with T1 dark brown, T2–3 white, T4 infuscate ( Fig. 115 ); fore wing infuscate with basal one-third and two large subapical spots hyaline, speculum open below ( Figs 112, 115 ); length of body female 1.4–2.3mm, male 1.4mm.

Female holotype: length of body 1.6mm.

Antenna dark brown. Frons golden-green. Vertex metallic purple in anterior one-half, golden-green in posterior one-half. Mesoscutum with posterior two-thirds of midlobe golden-green, sidelobes and anterior one-third of midlobe metallic purple. Mesoscutellum with anteromedian one-half golden-green, remaining parts metallic purple. Dorsellum golden-green. Propodeum black. Coxae, femora, mid and hind tibiae black; fore tibia whitish; fore tarsus infuscate, mid tarsus white, hind tarsus with T1 dark brown, T2–3 white, T4 infuscate. Fore wing infuscate with basal one-third and two large spots close to apical margin hyaline, hind wing hyaline. Petiole black. Gaster with Gt 1 metallic purple, remaining tergites dark brown.

Antenna flattened, scape widest at apex. Frons with strong reticulation; frontofacial suture Vshaped; upper border of frons ±distinct. Subtorular sutures absent. Vertex with anterior one-half with strong reticulation, posterior one-half with very weak reticulation. Occipital margin rounded.

Pronotal collar with a carina along anterior margin. Mesoscutum with strong reticulation; notauli distinct in anterior four-fifths; midlobe without setae. Mesoscutellum convex, with relatively strong reticulation in anteromedian one-half, remaining parts with very weak reticulation. Dorsellum convex and smooth. Propodeum smooth, with two parallel median carinae; callus with four setae. Fore wing speculum open below; with a stigmal hairline and with radial cell bare.

Petiole as long as wide with strong sculpture on dorsal surface. Gaster short-ovate, almost circular; Gt 1 smooth, remaining tergites with weak reticulation.

Relative measurements: head length dorsal 21; head length frontal 25; head width 40; POL 6; OOL 4.5; lateral ocellus maximum width 2.5; eye length 20.5; malar space 5.5; mouth width 11; mesosoma length 56; mesosoma width 36; mesoscutellum length 20.5; mesoscutellum width 21; fore wing length 93; fore wing width 52; marginal vein length 55.5; postmarginal vein length 3.5; stigmal vein length 6; fore wing marginal fringe length 7.5; gaster length 44; gaster width 40.

Variation in paratype material. Length of body: 1.4–2.3mm. Vertex metallic purple in anterior one-half, golden-green in posterior one-half or entirely metallic purple. Mesoscutum with posterior two-thirds of midlobe golden-green, golden-red or metallic purple. Mesoscutellum with anteromedian one-half golden-green and remaining parts metallic purple, or golden-red with sides metallic purple. Propodeum with or without median carinae.

Male ( Fig. 114 ). Length of body: 1.4mm. Scape narrower than in female and widest just below apex. Frons golden-purple. Vertex with anterior one-half metallic bluish-purple, posterior one-half black with metallic purple tinges. Mesoscutum with sidelobes metallic bluish-purple, midlobe with anterior one-half golden-green and posterior one-half golden-red. Mesoscutellum golden-red with lateral and posterior margins metallic bluish-green. Dorsellum metallic bluish-green. Gaster with Gt 1 metallic bluish-green. Sculpture as in female.

Hosts. Unknown.

Distribution. Costa Rica.

Material examined.

Type material. Holotype ♀ “ COSTA RICA: Cartago, P.N. Tapanti, 9˚45’N, 83˚47’W, 1200-1500m, 20.iii- 10.iv.2000, swept, C. Hansson & D. Rubí ” ( MZLU) . Paratypes (6♀, MZLU, MZUCR, NHMUK) : 2♀ with same label data as holotype ; 1♀ “ COSTA RICA: Heredia, 6km ENE Vara Blanca , 10˚11’N, 84˚07’W, 2000m, iii.2002, 20/TN/ALL, INBio, OET, ALAS” ; 1♀ “ COSTA RICA: Puntarenas, E.B. Monteverde, 10˚20’N, 84˚49’W, 1540m, 18-25.ii.2004, C. Hansson ” ; 1♀ 1♂ from same locality as previous but collected 26.ii.2007 ; 1♀ “ COSTA RICA: San José, San Gerardo de Dota , 20-21.ii.2013, J.S. Noyes, NHM (Ent) 2012-91” .

Etymology. From the Greek ion = purple, violet, and omos = shoulder, referring to the colour of sidelobes of mesoscutum.

Figures

Figs 112–116. Closterocerus spp. C. iomus – (112) habitus dorsal view, paratype ♀; (113) head frontal view, paratype ♀; (114) habitus dorsal view, paratype ♂; (115) habitus lateral view, paratype ♂. C. latiscapus, holotype ♀ – (116) habitus dorsal view.