Closterocerus amethystinus, 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 : 20

Closterocerus amethystinus sp.nov.

( Figs 200, 201 )

Diagnosis. Antenna flattened, scape widest at apex, all flagellomeres distinctly separated ( Fig. 201 ); pronotal collar with a carina along anterior margin ( Fig. 200 ); midlobe of mesoscutum with two pairs of strong setae ( Fig. 201 ); petiole as long as wide; fore wing infuscate with base and a band close to apical margin ±hyaline ( Figs 200, 201 ); hind tarsus with T1&4 dark brown, T2&3 white ( Fig. 201 ); length of body female 1.4mm.

Female holotype: length of body 1.4mm.

Antenna dark brown. Frons dark brown with golden-purple tinges. Vertex metallic purple with parts inside ocellar triangle golden-green. Mesoscutum with midlobe golden-green and sidelobes metallic purple. Mesoscutellum golden-green with lateral and posterior margins metallic purple. Dorsellum black with metallic purple tinges. Propodeum black. Coxae, femora, and tibiae dark brown with metallic purple tinges; fore and mid tarsi with T1–3 white and T4 infuscate, hind tarsus with T1&4 dark brown, T2&3 white. Fore wing infuscate with base and a band close to apical margin ±hyaline, hind wing hyaline. Petiole black. Gaster dark brown with metallic purple tinges.

Antenna flattened, scape widest at apex. Frons with strong reticulation; frontofacial suture V-shaped. Vertex with strong reticulation in anterior one-half, weak reticulation in posterior one-half. Subtorular sutures present. Occipital margin rounded.

Pronotal collar with a carina along anterior margin. Mesoscutum with strong reticulation; notauli narrow and complete; midlobe of mesoscutum with two pairs of strong setae. Mesoscutellum with distinctly weaker reticulation than mesoscutum. Dorsellum convex and smooth. Propodeum smooth on median part, with weak reticulation on lateral parts, with an irregular median carina; callus with two setae. Fore wing speculum closed; with a stigmal hairline and with radial cell bare.

Petiole as long as wide. Gaster ovate; tergites mainly smooth, partly with very weak reticulation.

Relative measurements: head length dorsal 17; head length frontal 20; head width 35; POL 6; OOL 4; lateral ocellus maximum width 2.5; eye height 17; malar space 5; mouth width 9; mesosoma length 43; mesosoma width 26; mesoscutellum length 16.5; mesoscutellum width 14.5; fore wing length 68; fore wing width 42; marginal vein length 33; postmarginal vein length 2; stigmal vein length 5.5; fore wing marginal fringe length 4; gaster length 41; gaster width 27.

Male. Unknown.

Hosts. Unknown.

Distribution. Costa Rica.

Material examined.

Type material. Holotype ♀ “ COSTA RICA: San José, Zurqui de Moravia , 1600m, 10˚3’N, 84˚0’W, v.1991, P. Hanson ” ( NHMUK).

Etymology. From the Latin amethystinus = colour like amethyst, referring to the purple colour on vertex.

Figures

Figs 200–204. Closterocerus spp. C. amethystinus, holotype ♀ – (200) habitus dorsal view; (201) habitus lateral view. C. coffeellae, non-types – (202) habitus dorsal view ♀; (203) habitus dorsal view ♀; (204) head frontal view ♂.