Closterocerus apiculus Hansson 2022, sp.nov.

Closterocerus apiculus sp.nov.

(Figs 36–39)

Diagnosis. Antenna dark brown to black with F5 white, scape widest at apex, F1–3 flattened, F4 moderately flattened, F5 not flattened and long and narrow (Fig. 37); pronotal collar without a carina along anterior margin (Figs 36, 38); midlobe of mesoscutum with two pairs of ±strong setae (Fig. 36); fore wing hyaline with apical margin and parts below stigmal vein weakly infuscate (Figs 36, 37); hind tarsus white to yellowish (Figs 37, 39); length of body female 0.8–1.2mm, male 0.7–0.9mm.

Female holotype: length of body 0.9mm.

Antenna dark brown with F5 white. Frons with lower one-half dark brown, upper one-half metallic pale blue. Vertex metallic bluish-purple. Mesoscutum metallic bluish-purple; mesoscutellum golden-green with lateral and posterior margins metallic purple; dorsellum and propodeum metallic purple. Legs with coxae dark brown; fore femur infuscate, mid and hind femora dark brown; fore and mid tibiae white, hind tibia dark brown; tarsi white to yellowish. Fore wing hyaline with apical margin and parts below stigmal vein weakly infuscate; hind wing hyaline. Petiole dark brown with metallic purple tinges. Gaster metallic bluish-purple with a large dark brown spot medially.Antenna predominantly flattened, except F5 that is narrow, scape widest at apex. Frons and vertex with strong reticulation. Frontofacial suture V-shaped. Subtorular sutures present. Occipital margin rounded.

Pronotal collar without a carina along anterior margin. Mesoscutum with strong reticulation; notauli distinct in anterior two-thirds; midlobe with two pairs of ±strong setae. Mesoscutellum with strong reticulation. Dorsellum convex and predominantly smooth. Propodeum smooth and shiny; propodeal callus with two setae. Fore wing speculum closed, with a stigmal hairline and with radial cell bare.

Petiole very short, just a narrow band. Gaster short ovate; Gt 1-3 smooth medially and with strong reticulation laterally, remaining tergites with strong reticulation.

Relative measurements: head length dorsal 12.5; head length frontal 17; head width 26.5; POL 4; OOL 2; lateral ocellus maximum width 2; eye length 14; malar space 2.5; mouth width 7.5; mesosoma length 28; mesosoma width 27; mesoscutellum length 11; mesoscutellum width 12.5; fore wing length 44; fore wing width 26; marginal vein length 21.5; postmarginal vein length 1.5; stigmal vein length 5; fore wing marginal fringe length 5; gaster length 31; gaster width 22.

Variation in paratype material. Length of body: 0.8–1.2mm. Vertex completely metallic purple or metallic purple in anterior one-half and metallic blue in posterior one-half. Mesoscutum metallic bluish-purple, or midlobe golden-green and sidelobes metallic purple. Mesoscutellum golden with lateral and posterior margins metallic blue, or golden-green with lateral and posterior margins metallic purple.

Male (Figs 38, 39). Length of body: 0.7–0.9mm. Scape not expanded at apex, dorsal and ventral margins ±parallel. Mesoscutum with midlobe golden-green or metallic bluish-green, sidelobes metallic bluish-purple. Mesoscutellum golden. Hind femur and hind tibia dark brown with apical one-third white. Otherwise as in female.

Hosts. Unknown.

Distribution. Costa Rica, Mexico, Venezuela.

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 (97♀ 27♂, CNC, MZLU, MZUCR, NHMUK, TAMU): 1♀ with same label data as holotype; 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 (9♀), 17-18.ii.2011 (8♀ 3♂), 23-24.ii.2013 (3♀), 19-20.ii.2016 (13♀ 4♂), 11-12.ii.2018 (11♀ 6♂); 8♀ 3♂ “ COSTA RICA: Puntarenas, P.N. Corcovado, Sirena, 8º29’N, 83º35’W, 5m, 19-20.ii.2004, J.S. Noyes ”; 14♀ 7♂ “ COSTA RICA: Puntarenas, P.N. Piedras Blancas, 100m, 8˚43’N, 83˚13’W, 13-14.ii.2012, J.S. Noyes, NHM (Ent) 2012- 91”; 3♀ “ COSTA RICA: Alajuela, P.N. Arenal, Send. Ceibo, 10º27’N, 84º41’W, 22-23.ii.2016, J.S. Noyes, NHM (Ent) 2016-79”; 2♀ “ COSTA RICA: Heredia, E.B. La Selva, 75m, 10º26’N, 84º01’W, 27-28.ii.2003, J.S. Noyes ”; 4♀ from same locality as previous but collected 22-24.ii.2012; 2♀ 1♂ “ COSTA RICA: Limón, R.B. Hitoy-Cerere, 100m, 9˚40’N, 83˚02’W, 20-22.ii.2006, J.S. Noyes ”; 12♀ 3♂ “ COSTA RICA: Turrialba, CATIE, Reventazon, 4.ix.1986, L. Masner ”; 1♀ “ COSTA RICA: Manuel Antonio N.P. 23-28.viii.1986, L. Masner ”. 1♀ “ MEXICO, Chiapas, 6mi N Berriozabal, 4000´[1219m], 8-9.viii.1990, J.B. Woolley, 90/056”. 4♀ “ VENEZUELA: Araqua, Rancho Grande, 3650’ [1113m], 28.v.1990, J.B. Woolley, 90/003”.

Etymology. From the Latin apiculus = apex, apical, referring to the white apical flagellomere.