Anicetus oroso, Noyes, 2023

Noyes, John Stuart, 2023, ENCYRTIDAE OF COSTA RICA (HYMENOPTERA: CHALCIDOIDEA), 4 Subfamily Encyrtinae: tribes Arrhenophagini, Habrolepidini, Cerapterocerini, Cheiloneurini, Trechnitini, Cercobelini, Polaszekiini, Protyndarichoidini, Gahaniellini and Syrphophagini (part), mainly primary parasitoids and hyperparasitoids of Coccoidea and Psylloidea (Hemiptera), Taxonomic Monographs on Neotropical Hymenoptera (Oxford, England) 2 (11), pp. 1-921 : 510-511

Anicetus oroso sp.nov.

(Figs 1267-1273)

DIAGNOSIS. Female (length about 1.6mm): hind tibia pale orange with a faint pale brown, subbasal spot; hind tarsus with basitarsus and apex dark brown, contrasting with pale orange remainder; frontovertex, (Fig. 1269) except for a narrow strip dorsally along transfacial carina, with distinct punctate-reticulate sculpture of cell size slightly smaller than diameter of eye facet; scape (Fig. 1268) 1.5X as long as broad with apex of dorsal margin flattened and conspicuously shiny; pedicel dorsally flat and shiny, asymmetrical, with an elongate ventral process; funicle about as long as first segment of clava (measured dorsally); clava, in profile, about 2X as long as broad; ovipositor (Fig. 1267) weakly exserted, the exserted part about 0.5X as long as mid tibial spur; anterolateral projections of hypopygium (Fig 1273) less than one-fifth its overall length. Male: Unknown.

Female (holotype): length, including ovipositor, 1.56mm; excluding ovipositor, 1.48mm ( CPD) .

Body generally dark orange, mesoscutum with a weak purple sheen; transfacial carina dorsally with a coppery purple sheen; a transverse brown band across face level with torulus (Fig. 1269); lower parts of interantennal prominence and lower gena with dense slightly silvery setae; antenna (Fig. 1268) with scape orange, bordered dark brown; pedicel orange with apical part of ventral process dark brown and dorsal margin dark brown with a metallic green sheen; funicle similarly coloured to pedicel; clava orange with ventral margin dark brown and dorsal margin dark brown with a metallic green sheen, coppery purple towards apex; darker markings on antenna stronger on internal surfaces; legs almost completely pale orange, fore coxa posteriorly very pale brown, the mid tibial spur pale orange, hind tibia with extreme base dark brown, subbasal area white followed by a faint, pale brown subbasal spot; fore wing (Fig. 1272) mostly infuscate but hyaline towards base and at apex, venation orange-brown; metanotum dark brown; gaster mostly orange with Gt1- Gt6 dorsally dark brown with a mixed purple, coppery and brassy sheen, side of Gt2-Gt5 with a metallic green and blue-green sheen; gonostylus pale orange.

Head (Fig. 1269) about 8X as wide as frontovertex, with very fine, punctate-reticulate sculpture on frontovertex of cell diameter much less than diameter of facet, dorsal part of transfacial carina almost smooth but with some very shallow reticulate sculpture; a shallow, shiny bottomed depression present adjacent to eye margin between posterior ocellus and occipital margin; ocelli forming a very acute angle of about 35°; eye overreaching occipital margin, appearing naked, but with sparse, very short setae that are less than half as long as diameter of facet; face below transverse brown band clothed with conspicuous, very dense setae; interantennal prominence without a median carinate ridge; antenna as in Fig. 1268; scape about 1.5X as long as broad, subtrapezoidal, with proximal part of dorsal margin subequal in length to distal part and with proximal part of ventral margin about 1.6X as long as distal part; distal part of dorsal margin of scape completely flat, smooth and shiny; dorsal part of pedicel completely smooth and shiny; pedicel and all funicle segments subequal in width, dorsal and ventral margins subparallel; funicle, measured dorsally about as long as first segment of clava; clava relatively very long, about 1.8X as long as pedicel and funicle combined, sutures strongly oblique, sensory area about 7X as long as ventral margin, apex strongly obliquely truncate; mandible with two acute teeth and a truncation;

Thorax (Fig. 1271) with polygonally reticulate to imbricate reticulate sculpture on pronotum and mesoscutum that is slightly shallower than, but of similar mesh size to, sculpture on frontovertex; mesoscutum with a line of sparse, fine pores along midline and one or two similar pores near posterolateral margin; axilla with similar sculpture to that on frontovertex; scutellum with longitudinally elongate, polygonally reticulate sculpture that is slightly coarser and deeper than on frontovertex; fore wing about 2.4X as long as broad with venation and setation as in Figs 1270, 1272; area below submarginal vein without a line of setae, with only two or three setae near base and cubital vein with at most only 3 setae distally; apices of postmarginal and stigmal veins connected by a naked, hyaline streak; propodeum (Fig. 1271) with 5 or 6 short carinae connecting transverse, submedian carina to anterior margin of the propodeum; 6 or 7 setae anterior to and outside spiracle. Relative measurements: FWL 103, FWW 43; HWL 80.5, HWW 24.

Gaster with hypopygium (Fig. 1273) reaching about 0.4X to apex; syntergum about 0.6X as long as mid tibia with apex broadly rounded; ovipositor (Fig. 1267) hardly exserted, the exserted part not more than about half as long as mid tibial spur. Relative measurements: OL 50.5, GS 14 [MT 41.5].

Variation. Only holotype examined.

Male. Unknown.

DISTRIBUTION. Costa Rica.

HOSTS. Unknown

MATERIAL EXAMINED.

Type material. Holotype: E: COSTA RICA, Alajuela, RB San Ramon, 900m, xi-xii.1999 (P. Hanson) . Holotype in NHMUK .

COMMENTS. Anicetus oroso is close to arche , primus and quintanai (see comments under arche , p. 510). It is probably closest to primus because both species have the funicle about as long as the first segment of the clava (measured dorsally) and the ovipositor relatively weakly exserted. It differs from primus in being much larger, having a very narrow frontovertex with the ocelli forming an angle of only about 35°. The female of primus is about 0.9mm in length and has a moderately broad frontovertex with the ocelli forming only a slightly acute angle (probably of at least about 60°).