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

description: Cheiloneurus roellus sp.nov.   
(Figs 567-571; Hab. E 87)  
 DIAGNOSIS. Female (length about 1.2-1.3mm): body generally dark brown to black with a weak to moderate metallic sheen; scape (Fig. 567) dark brown, apex yellow; pedicel brown, apex yellow; funicle and clava pale testaceous yellow; mesoscutum with pale, silvery setae; coxae white, mid coxa brown proximally; legs otherwise white to pale orange with brown areas; fore wing hyaline; head about 3.7X as wide as frontovertex, in facial view about as broad as broad as long, subcircular, gena weakly and evenly curved; frontovertex naked medially below anterior ocellus; area between eye and scrobe about 2X as wide as diameter of anterior ocellus, with distinct sculpture, scrobal margin rounded; interantennal prominence dorsally rounded with only a few long setae; mandible with three sharp teeth, upper tooth shortest; antenna (Fig. 567) with scape about 4X as long as broad; funicle with all segments subquadrate, becoming larger distad; head about as wide as length of flagellum; linear sensilla on F5-F6; clava 3-segmented, about as long as F2-F6 combined, sensory area small, extending less than 0.1X along ventral margin; mesoscutum(Fig. 568) with polygonally reticulate sculpture; scutellum with a distinct apical tuft of setae; wings fully developed; fore wing (Fig. 571) about 2.7X as long as broad; parastigma slightly swollen, not curved downwards; apex of stigmal vein with 4 campaniform sensilla; costal cell dorsally with only 1 or 2 setae at apex and a single, complete line of setae ventrally; area below proximal part of parastigma with a group of about 15 pale setae; apices of postmarginal and stigmal veins not connected by a naked hyaline area (Fig. 570); apical bristle of postmarginal vein about 0.5X as long as marginal vein; mid tibial spur slightly longer than basitarsus; propodeum with about 15 setae around each spiracle, not extending down side; gaster without “glands” on Gt1 and Gt5; syntergum about 1.2X as long as mid tibia; ovipositor about 2.7X gonostylus or 1.7X mid tibia; gonostylus about 1.8X as long as mid tibial spur; exserted part of ovipositor about 0.4X as long as mid tibial spur. Male: unknown.   
Female (holotype): length, including ovipositor, 1.21mm; excluding ovipositor, 1.18mm (CPD).  
Head black with weak, blue and coppery purple reflections on frontovertex; scrobal area mostly with a purple sheen merging to coppery laterally on gena; mouth margin with a slight metallic green sheen; temple metallic green; frontovertex with inconspicuous dark brown setae; antenna (Fig. 567) with radicle dark brown; scape dark brown, apical one-third yellowish; pedicel brown, apical one-third yellow; flagellum pale testaceous-yellow; thorax mostly dark brown to black; pronotum with a slight purple sheen; mesoscutum clothed in pale, silvery setae and with a weak, blue sheen mixed purple and posterior margin dark purple; tegula dark brown; axilla with a weak dark blue and purple sheen; scutellum matt, clothed with dark brown setae, sides and apex shining green with a distinct dark blue and purple sheen; metanotum with slight purple sheen; mesopleuron in posterior half with a coppery-purple sheen, anterior half with a weak violet sheen; fore coxa white; fore femur white proximally, apical half dark brown, tibia narrowly white proximally, remainder of basal half dark brown, apex very pale orange; mid coxa brown proximally, otherwise white; mid femur white in proximal one-third, and extreme apex, otherwise dark brown, tibia narrowly white proximally, a dark brown subbasal band extending a little less than half-way, remainder very pale orange; hind coxa white; hind femur white in proximal one-third, otherwise dark brown, tibia narrowly white proximally, a dark brown subbasal band extending a little more than half-way, remainder white; pretarsus slightly dusky; fore wing completely hyaline (Fig. 571), venation mostly pale yellow-brown, submarginal vein partially hyaline; propodeum dark purple-brown; sides metallic green with conspicuous silvery setae in spiracular area; gaster dark purple-brown, Gt1 largely dark metallic blue with some violet reflections; remainder of gaster mixed purple and brassy; gonostylus dark brown.  
Head about 3.7X as wide as frontovertex, not subtriangular in profile, occipital margin sharp, occiput without a shallow, median groove; ocelli forming an angle of about 65°; frontovertex slightly shiny, with conspicuous reticulate sculpture of mesh size generally very slightly smaller than diameter of eye facet; scrobes and mouth margin with shallower sculpture; gena with elongate sculpture; temple almost smooth, with shallow irregular, reticulate sculpture, of larger mesh than frontovertex and distinctly elongate posteriorly; scrobes shallow, meeting dorsally, dorsal and lateral margins weakly rounded; antenna as in Fig. 567; scape slightly broadened and flattened, about 4X as long as broad; all funicle segments subquadrate, broader and larger distad; clava slender, about as long as F2-F6 combined, sutures not oblique, sensory area small, at apex only and giving it a rounded appearance; eye very nearly reaching occipital margin, separated by less than diameter of a facet, clothed with conspicuous setae that are each at least as long as diameter of facet; inner eye margins not converging anteriorly; malar sulcus absent; mandible with three sharp teeth, upper tooth shortest. Relative measurements: HW 48, HH 49, FV 13, OD 3.5, POL 6.5, OOL 1, OCL 5, AOL 7.5, EL 33, EW 26.5, MS 21, SL 27.5, SW 7.  
Thorax (Fig. 568) with shallow, irregular, polygonally reticulate sculpture on pronotum, generally of mesh size subequal to diameter of facet; sculpture on mesoscutum generally of similar depth to that on pronotum, but more regular and of smaller mesh; sculpture on axilla similar to that on mesoscutum, but slightly deeper; scutellum with conspicuously deeper, polygonally reticulate sculpture; apex and sides narrowly completely smooth; visible part of mesoscutum about 2X as broad as long; scutellum very slightly broader than long, with a distinct subapical tuft, setae about half as long as scutellum; hind femur about 3.5X as long as broad; fore wing with venation and setation as in Figs 570, 571; costal cell with only 1 seta dorsally at apex; no naked streak present between apices of postmarginal and stigmal veins; propodeum (Fig. 568) with numerous setae in spiracular area, side naked, medially about 0.1X as long as scutellum and without distinct sculpture. Relative measurements: FWL 55, FWW 20.5; HWL 44, HWW 10.  
Gaster with hypopygium reaching about half-way to apex; syntergum slightly longer than mid tibia and with apex acute; ovipositor slightly exserted, the exserted part about 0.4X as long as mid tibial spur.  
Paratype. Funicle with linear sensilla present only on 5-F6; gaster without “glands” on Gt1 and Gt5; ovipositor as in Fig, 569, gonostylus about 2X as long as mid tibial spur. Relative measurements: OL 45.5, GL 17 [MT 27].  
Variation. Females vary in overall length from 1.21-1.27mm, otherwise little in material examined.  
Male. Unknown.  
DISTRIBUTION. Costa Rica.  
HOSTS. Unknown.  
MATERIAL EXAMINED.  
 Type material. Holotype E: COSTA RICA, Guanacaste, Pitilla (ACG), 700m, MT/YPT, 24.i-27.ii.1996 (J.S. Noyes). Paratypes: COSTA RICA, 1E, Guanacaste, Estac. Pitilla, 9km S Santa Cecilia, 700m, iv.1989 (I. Gauld). Holotype in MZUCR, paratype in NHMUK.
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 229-230, DOI: 10.5281/zenodo.8074943