Cheiloneurus marcius Noyes 2023, sp.nov.
Creators: name: Noyes, John Stuart
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Encyrtidae
Cheiloneurus
Cheiloneurus marcius

description: Cheiloneurus marcius sp.nov.   
(Figs 720-725)  
 DIAGNOSIS. Female (length about 1.4mm): body generally orange, gaster mostly dark brown, paler areas with a weak metallic sheen, darker areas with a stronger metallic sheen; antenna (Fig. 722) with scape mostly pale orange, ventrally margined brown; pedicel very pale orange with a dark brown streak; funicle with proximally brown, distally orange; clava dark brown; posterior half of mesoscutum with dense silvery setae; fore and hind coxae white, mid coxa very pale orange; legs mostly white to pale orange; fore wing (Fg. 725) mostly infuscate with basal cell mostly hyaline, a small hyaline area at apex of venation which continues more broadly around wing apex to opposite margin; head (Fig. 720) about 5.3X as wide as frontovertex, in facial view slightly broader than long, subrectangular, genae weakly curved, hardly converging, but more strongly curved inwards near mouth; frontovertex with about 4 setae medially between anterior ocellus and scrobes; eye separated from scrobe by about 1.5X diameter of anterior ocellus, area between eye and scrobe completely smooth, scrobes deep and sharply margined; interantennal prominence with more than 100 conspicuous setae and dorsally rounded; mandible tridentate; antenna (Fig. 722) with scape about 1.8X as long as broad; funicle segments subquadrate; linear sensilla on F4-F6; clava 3-segmented, about as long as funicle, sensory area enlarged, extending about 0.5X along ventral surface of clava giving it a strongly obliquely truncate appearance; head width about equal to length of pedicel and flagellum combined; mesoscutum (Fig. 721) anteriorly with coarse lineolate sculpture, posteriorly with polygonally reticulate sculpture; scutellum with a distinct, apical tuft of setae; wings fully developed; fore wing (Fig. 725) about 2.6X as long as broad; parastigma slightly downcurved; costal cell dorsally naked or with a single apical seta, ventrally more or less with a complete line of setae; area below proximal part of parastigma with a line of about 8-10, paler setae that curves towards fore wing base; apices of postmarginal and stigmal veins connected by a naked, hyaline area that extends a little way into disc (Fig. 724); seta at apex of postmarginal vein about 0.8X as long as marginal vein; mid tibial spur slightly longer than basitarsus; propodeum (Fig. 721) with only about five setae adjacent to spiracle; syntergum hardly longer than mid tibia; ovipositor (Fig. 723) about 3.2X gonostylus or about 1.7X as long as mid tibia; gonostylus about 1.4X as long as mid tibial spur; exserted part of ovipositor about 0.5X as long as mid tibial spur. Male: unknown.   
Female (holotype): length, including ovipositor, 1.37mm; excluding ovipositor, 1.29mm (CPD).  
Head generally orange; occiput pale orange, slightly dusky near foramen; an oblique, brown stripe across temple towards torulus; frontovertex with a weak metallic blue sheen, stronger metallic green between posterior ocelli, purple immediately above scrobes; temple with a slight metallic blue and purple sheen; shining metallic green and purple between eye and scrobe; gena relatively dull green and brassy with some coppery and purple reflections; top of scrobes delimited by a slightly curved, metallic green band; frontovertex with inconspicuous pale brown setae along inner eye margins; a line of slightly more conspicuous, translucent, white setae below eye; interantennal prominence clothed with dense, conspicuous, silvery setae; maxillary palpus yellow; antenna (Fig. 722) with radicle orange-brown with a narrow brown apical ring; scape pale orange, apical one-third white, extreme apex brown, ventral margin dark brown, more broadly so proximally, upper margin pale brown proximally, a transverse brown band between apical white area and proximal pale orange area; pedicel very pale orange with a dark brown streak along inner surface; F1 brown, F2-F5 brown dorsally mixed yellow, distal segments more yellow, F6 yellow, clava dark brown; pronotum orange with weak brassy and coppery reflections, neck and area above coxa brown; prosternum pale orange, brown anterior to coxa; mesoscutum orange in anterior half with some very weak coppery and brassy reflections, clothed in relatively sparse golden brown and dark brown setae, posterior half and side brown with a moderately strong, dark blue sheen with some purple reflections, clothed in conspicuous, relatively dense silvery setae, posterior margin purple-brown with a purple sheen; tegula orange with apex orange-brown; axilla and scutellum orange, clothed with golden brown and brown setae, subapical tuft on scutellum black; metanotum orange-brown; mesopleuron orange with a weak brassy sheen, slightly dusky posteriorly with a weak purple and brassy sheen; mesosternum orange; fore coxa and proximal half of fore femur white, fore leg otherwise pale orange; mid coxa slightly dusky, very pale orange; mid femur white in proximal half, apex pale orange, tibia mostly pale orange, white at base and an incomplete, brown subbasal ring, spur and tarsus pale orange; hind coxa white; hind femur pale orange, slightly dusky along margins towards apex, tibia and tarsus pale orange; fore wing (Fig. 725) mostly infuscate, hyaline towards base, along anterior margin distad of venation and at apex; submarginal vein pale orange, venation otherwise brown; propodeum orange medially, brown laterally with a dark metallic blue and purple sheen, side metallic blue, about 3 or 4 long, translucent, white setae in a line outside spiracle; gaster dark brown with a coppery sheen, Gt1 largely with a metallic blue and green sheen, side and venter largely with green and blue reflections, syntergum pale orange-brown; gonostylus pale orange.  
Head (Fig. 720) about 5.3X as wide as frontovertex, in profile 1.5X as high as deep, anteriorly quite straight from top of scrobes to mouth margin, interantennal prominence slightly protuberant; occipital margin sharp, not carinate; ocelli forming an angle of about 50°; frontovertex quite shiny, with shallow, polygonally reticulate sculpture of mesh size much smaller than diameter of facet; narrowest point between eye and scrobe about 1.5X diameter of anterior ocellus and completely smooth; temple quite smooth, but with shallow, irregular, elongate, reticulate sculpture; gena with slightly deeper more regular, polygonally reticulate sculpture; scrobes deep, ∩-shaped, meeting, sharply margined; interantennal prominence dorsally rounded and with shallow, polygonally reticulate sculpture; antenna as in Fig. 722; scape strongly broadened and flattened, about 1.8X as long as broad, broadest in middle; funicle segments subquadrate, larger and broader distad; linear sensilla present only on F4-F6; clava clearly broadened, about as long as funicle, sutures slightly oblique, sensory area enlarged, extending ventrally nearly half length of clava, apex appearing strongly obliquely truncate; eye reaching occipital margin, appearing naked, but clothed in sparse, inconspicuous, fine, very short setae, each much shorter than diameter of facet; inner eye margins subparallel, converging slightly anteriorly; malar sulcus absent; clypeal margin very slightly convex medially; mandible with three acute; apical segment of maxillary palpus not enlarged, about as long as radicle. Relative measurements: HW 63, HH 60, FV 12, POL 5.5, OOL 0, OCL 5, AOL 7, EL 41, EW 32, MS 30, SL 31.5, SW 18.  
Thorax (Fig. 721) with pronotum short and hardly exposed behind head, about 0.6X as long as mesoscutum, pronotum with polygonally reticulate sculpture that is a little deeper than that on frontovertex; mesoscutum (Fig. 721) in anterior half with coarse lineolate sculpture, posterior half with polygonally reticulate sculpture of similar depth; axilla and scutellum with polygonally reticulate sculpture similar to that on pronotum, but perhaps slightly coarser, especially on scutellum where it is longitudinally elongate laterally; visible part of mesoscutum about 2.4X as broad as long; scutellum about as long as broad with a distinct subapical tuft, setae mostly about 0.4X as long as scutellum; mid tibia with a distinct external carina for about half its length; hind femur about 4.2X as long as broad; fore wing with venation and setation as in Figs 724, 725; costal cell with 2 or 3 setae dorsally at apex; apices of postmarginal and stigmal veins connected by a distinct, naked, hyaline streak (Fig. 724); propodeum medially (Fig. 721) about 0.12X as long as scutellum and virtually smooth, setae on side conspicuous. Relative measurements: FWL 66, FWW 25; HWL 50, HWW 13.5.  
Gaster without “gland-like” structures on Gt1 or Gt5; hypopygium reaching about 0.4X to apex; syntergum about 0.9X as long as mid tibia, with apex acute; ovipositor (Fig. 723) slightly exserted, the exserted part about half as long as mid tibial spur or nearly 0.2X as long as mid tibia. Relative measurements: OL 55, GL 17 [MT 32.5].  
Variation. Only holotype examined.  
Male. Unknown.  
DISTRIBUTION. Costa Rica.  
HOSTS. Unknown.  
MATERIAL EXAMINED.  
 Type material. Holotype E: COSTA RICA, Puntarenas, Est. Altamira, Send. Los Gigantes, LS 321800 572100, 1460m, #62126, iii-iv.2001 (D. Rubí). Holotype in NHMUK.   
 COMMENTS. See comments under simus (p. 290).
description: Published as part of 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), pp. 1-921 in Taxonomic Monographs on Neotropical Hymenoptera (Oxford, England) (Oxford, England) 2 (11) on pages 290-292, DOI: 10.5281/zenodo.8074943