Cheiloneurus janzeni, 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 : 444-446

Cheiloneurus janzeni sp.nov.

(Figs 1127-1131; Hab. E 162)

DIAGNOSIS. Female (length about 1.0- 1.5mm): body mostly orange with some brown areas with a weak to moderate metallic sheen on head, mesoscutum and gaster; mouth margin narrowly dark brown; temple with a distinct diagonal, brown streak to gena; antenna (Fig. 1131) with scape mostly pale orange with ventral margin brown; pedicel pale orange with a dark brown longitudinal streak; funicle mainly pale orange, some segments slightly dusky, F6 dark brown; clava dark brown; posterior half of mesoscutum with dense silvery setae; fore and hind coxae white, mid coxae pale orange; legs mostly white to pale orange with brown areas; fore wing (Fig. 1130) mostly infuscate with basal cell almost completely hyaline, a small hyaline area at apex of venation and an opposite hyaline area on posterior wing margin, apex hyaline; head (Fig. 1127) about 8X as wide as frontovertex, in facial view about as broad as long, subcircular with genae converging and uniformly curved, slightly more curved inwards near mouth margin; frontovertex with two setae medially above scrobes; eye separated from scrobe by about 1.3-1.4X diameter of anterior ocellus, area between eye and scrobe completely smooth, scrobal margin sharp below eye; interantennal prominence with about 24 inconspicuous setae and with a dorsal median ridge; mandible with three teeth; antenna (Fig. 1131)with scape about 3.3X as long as broad; funicle segments subquadrate; head width about equal to flagellum length; linear sensilla on F4-F6; clava 3-segmented, about as long as F3-F6 combined; sensory area enlarged and forming an oblique truncation, extending about 0.3X along ventral margin; mesoscutum (Fig. 1128) anteriorly with fine, longitudinally elongate, lineolate-reticulate sculpture; scutellum with a distinct, apical tuft of setae; wings fully developed; fore wing (Fig. 1130) about 2.5-2.6X as long as broad; parastigma slightly downcurved; costal cell dorsally naked or with one seta at apex, with a line of setae ventrally that is broadly interrupted above parastigma; area below proximal part of parastigma with a line of about four to six pale setae; apices of postmarginal and stigmal veins connected by a naked hyaline area that curves a little way into disc (Fig. 1129); apical bristle of postmarginal vein about 0.5-0.6X as long as marginal vein; mid tibial spur very slightly longer than basitarsus; propodeum with two or three setae adjacent to spiracle, side naked; syntergum about 0.9X as long as mid tibia; ovipositor about 3.7X gonostylus or about 1.4X as long as mid tibia; gonostylus about 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, 1.30mm; excluding ovipositor, 1.25mm (CPD).

Head mostly pale orange; frontovertex with a weak blue, green and purple sheen, stronger in ocellar area; temple and upper gena with a weak brassy sheen, lower gena with a very weak brassy and purple sheen, area between eye and scrobe with a slightly stronger purple sheen; scrobal area with a weak brassy and purple sheen; lower face with a median, curved, brown line between toruli and mouth margin that meets mouth margin near base of mandible; temple with a distinct, diagonal pale brown streak from temple behind eye towards torulus; frontovertex clothed with inconspicuous, pale brown setae, a line of translucent setae between eye and scrobe; maxillary palpus white; antenna (Fig. 1131) with radicle pale orange, apex narrowly ringed orange-brown; scape pale orange, distinctly margined brown ventrally, more widely so internally towards base, upper margin weakly brown; pedicel mostly pale orange with a dark brown streak internally along its length; funicle segments largely pale orange, F1-F3 slightly dusky on sides, F6 dark brown, clava dark brown; pronotum mostly orange, neck and side above coxa brown; mesoscutum anteriorly orange, posterior half shining blue-green, behind this, posterior margin brown with a weak purple sheen, anterior half of mesoscutum clothed in relatively sparse golden brown to dark brown setae, posterior half clothed in relatively dense, translucent, silvery setae mixed with a few dark brown setae; tegula orange with apex orange-brown; axilla and scutellum orange, axilla clothed with brown setae, scutellum clothed anteriorly with golden brown setae, otherwise setae dark brown, subapical tuft black; metanotum slightly dusky pale orange; mesopleuron pale orange, slightly dusky posteriorly, anterior part with a very weak brassy sheen, posterior part with a weak purple sheen; fore coxa white; fore femur concolourous with coxa basally, apex pale orange, tibia and tarsus very pale orange, tarsus slightly dusky; mid coxa pale orange; mid leg otherwise similarly coloured to fore leg, tibia with remnants of a narrow, brown, subbasal ring; hind coxa white, femur, tibia and tarsus pale orange; fore wing (Fig. 1130) mostly infuscate, hyaline towards base and at apex; submarginal vein pale yellow, venation otherwise pale brown; propodeum dusky pale orange, slightly darker on side and with a weak blue and purple sheen, 2 or 3 white setae near spiracle; gaster largely pale orange to orange-brown, apex of syntergum and apex of outer plate of ovipositor pale brown, Gt1 dark brown dorsally, Gt2-Gt4 dark brown medially, Gt5 similar but paler, Gt1 with a distinct metallic green sheen laterally, otherwise gaster generally with a mixed coppery, purple, green, blue and brassy sheen that is weakest on paler areas; gonostylus very pale orange, almost white.

Head (Fig. 1127) about 7.7X as wide as frontovertex, in profile about 1.5X as high as deep, anteriorly quite straight below top of scrobes, interantennal prominence hardly protuberant level with torulus; occipital margin sharp, not carinate; ocelli forming an angle of about 40°; frontovertex quite shiny, with shallow, fairly regular, polygonally reticulate sculpture of distinctly smaller mesh than diameter of eye facet; area between eye and scrobe hardly wider than diameter of anterior ocellus, smooth; scrobes shallow, more or less Λ-shaped, sharply margined; interantennal prominence with similar sculpture to frontovertex, dorsally with a strong, carinate, median ridge that reaches frontovertex and separates scrobes; temple and upper gena completely smooth, lower gena with shallow, irregular sculpture; antenna as in Fig. 1131; scape broadened and flattened, about 3.3X as long as broad; funicle with segments broader and larger distad, segments subquadrate; clava broadened, about as long as F3-F6 combined, sutures oblique, sensory area enlarged, extending ventrally about 0.3X along clava, giving it an obliquely truncate appearance; eye slightly overreaching occipital margin, clothed with sparse, inconspicuous short setae, each much shorter than diameter of facet; inner eye margins clearly converging in front of anterior ocellus, diverging a little way above scrobes; malar sulcus absent; clypeal margin weakly concave medially; mandible with three teeth; apical segment of maxillary palpus not enlarged, hardly longer than radicle. Relative measurements: HW 85, HH 83, FV 11, POL 5, OOL 0, OCL 5, AOL 9, EL 57, EW 49, MS 40, SL 43, SW 13.

Thorax (Fig. 1128) with irregular, polygonally reticulate sculpture on pronotum that is of similar depth to that on frontovertex; mesoscutum with polygonally reticulate sculpture in posterior half that is a little deeper than that on frontovertex, anterior half with fine, longitudinally elongate, lineolate-reticulate sculpture; axilla mostly with fairly regular, polygonally reticulate sculpture that is conspicuously deeper and coarser than that on frontovertex, scutellum with longitudinally striate-reticulate sculpture that is similar to that on anterior part of mesoscutum; visible part of mesoscutum about 2.0X as broad as long; scutellum about 1.1X as long as broad with a distinct subapical tuft, setae mostly about 0.7X as long as scutellum; hind femur about 4.7X as long as broad; fore wing with venation and setation as in Figs 1129, 1130; costal cell dorsally naked at apex; apices of postmarginal and stigmal veins connected by a distinct, naked, hyaline streak Fig. 1129; propodeum (Fig. 1128) with side completely smooth, medially about 0.16X as long as scutellum and with very shallow, irregular sculpture, virtually smooth. Relative measurements: FWL 82.5, FWW 32.5; HWL 67.5, HWW 16.5.

Gaster with hypopygium reaching about half-way to apex; syntergum about 0.9X as long as mid tibia, with apex weakly angular; ovipositor slightly exserted, the exserted part about 0.4X as long as mid tibial spur or about 0.15X mid tibia.

Paratype. Funicle with linear sensilla present only on F4-F6; gaster without “gland-like” structures on Gt1 or Gt5. Relative measurements: OL 69, GL 18.5 [MT 50].

Variation. Females vary in overall length from 1.31-1.53mm, otherwise very little in material examined.

Male. Unknown.

DISTRIBUTION. Costa Rica.

HOSTS. Unknown.

MATERIAL EXAMINED.

Holotype E: COSTA RICA, Puntarenas, RP Karen Mogensen, Send. Quebr. Perez, LN 205300 419750, 200-400m, #75744, 6.x.2003 (W. Porras) . Paratypes: COSTA RICA, 1E, Puntarenas, same data as holotype; 1E, Puntarenas, San Luis, Monteverde , LN 449250 250850, 1000-1350m, #2883, i.1994 (Z. Fuentes) . Holotype in NHMUK, paratypes in MZUCR and NHMUK .

COMMENTS. This species is named in honour of Prof. Dan Janzen for his heroic efforts to understand and preserve natural tropical ecosystems, in particular within Costa Rica.

See comments under alopes (p. 443), dirce (p. 448) and omorus (p. 455).