Georynus dionysus, 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 (1), pp. 1-921 : 1-921

Georynus dionysus sp.nov.

( Figs 423-427)

DIAGNOSIS. Female (length about 1.7mm): fore wing ( Fig. 426) mostly hyaline, but weakly infuscate below marginal vein; head without setae medially in front of anterior ocellus; area immediately below eye with some shallow sculpture; antenna ( Fig. 425) with scape about 4.5X as long as broad; funicle with segments quadrate or transverse; clava with sensory area extending about 0.5X as long ventral surface; fore wing ( Fig. 426) with linea calva closed near posterior margin; costal cell with only a single line of setae on ventral surface in apical half; syntergum about as long as mid tibia; ovipositor about 1.5X as long as mid tibia; gonostylus about 1.5X as long as mid tibial spur. Male: unknown.

Female ( holotype): length, including ovipositor, 1.68mm; excluding ovipositor, 1.61mm ( CPD) .

Head mainly black; frontovertex generally with a metallic green sheen, mixed with some blue reflections; scrobe and temple with a metallic green sheen, scrobe laterally margined coppery purple; interantennal prominence and gena coppery purple; frontovertex, gena and interantennal prominence with short, inconspicuous, translucent, pale brown setae; clava orange-brown; pronotum black with a coppery purple and brassy sheen; propleuron and prosternum dark brown; mesoscutum black with a weak coppery and coppery purple sheen mixed brassy, with some blue reflections; tegula dark brown with a slight purple and brassy sheen; axilla black with a dark purple sheen; scutellum largely metallic dark green, tending to dark blue between axillae and paler green towards apex, extreme apex coppery, side coppery mixed metallic green; dorsum of thorax clothed with slightly translucent, brown setae; metanotum dark brown with a weak brassy sheen; mesopleuron dark purple-brown with a weak brassy sheen; mesosternum dark brown; fore femur proximally white, pale orange distally, tibia and tarsus pale orange; mid femur proximally white, distally pale orange, tibia pale orange, very pale orange medially, spur and tarsus pale orange; hind femur white towards base, otherwise pale orange, tibia and tarsus pale orange; fore wing ( Fig. 426) weakly infuscate below marginal vein, with marginal vein dusky pale orange; propodeum dark brown with a weak purple and brassy sheen, setae anterior to and outside spiracle white, translucent and moderately conspicuous; gaster dark brown dorsally mainly with a coppery and purple sheen, Gt1 with some green and brassy reflections, side and venter mainly with a mixed green, blue, brassy, purple and coppery sheen; gonostylus pale orange.

Head about 7.9X as wide as frontovertex, without setae medially in front of anterior ocellus, a line of sparse setae along inner eye margin continued along lower eye margin; ocelli forming an angle of about 35°; temple and gena about as shiny as frontovertex, with slightly shallower, longitudinally elongate, strigose to striate-reticulate sculpture, area immediately below eye with some very shallow sculpture; eye separated from scrobal margin by less than 0.5X diameter of ocellus, area between eye and scrobe with shallow, transversely elongate, imbricate-reticulate sculpture; sculpture on interantennal prominence polygonally reticulate but a little shallower that on frontovertex; antenna as in Fig. 425; scape hardly broadened, about 4.6X as long as broad; all funicle segments quadrate or transverse, with F1 and F4 perhaps very slightly longer than broad,

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segments becoming wider distad, linear sensilla present only on F3-F6 or absent from F3; clava hardly broadened, about 1.1X as wide as F6, a little longer than F2-F6 combined, outer suture strongly oblique, sensory area enlarged, extending ventrally about 0.5X length of clava, apex strongly obliquely truncate. Relative measurements: HW 67, HH 68, FV 8.5, POL 4, OOL 0, OCL 8.5, AOL 10, EL 52, EW 42, MS 24, SL 37, SW 8.

Thorax with visible part of mesoscutum about 2X as broad as long; scutellum about as long as broad; fore wing with venation and distribution of setae as in Figs 423, 426; mid tibial spur very slightly shorter than basitarsus; propodeum medially about 0.16X as long as scutellum, with some shallow, irregular sculpture medially; about 5 setae anterior to and outside spiracle. Relative measurements: FWL 86.5, FWW 36; HWL 65.5, HWW 15.

Gaster with hypopygium ( Fig. 424) reaching about 0.5X towards apex; syntergum about as long as mid tibia, with apex acute; ovipositor ( Fig. 427) slightly exserted, the exserted part about half as long as mid tibial spur or about 0.15X as long as mid tibia. Relative measurements: OL 57, GS 18 [MT 39].

Variation. Only holotype examined.

Male. Unknown.

DISTRIBUTION. Costa Rica.

HOSTS. Unknown.

MATERIAL EXAMINED.

Type material. Holotype E: COSTA RICA, Limón, [ RB Hitoy Cerere], Sendero Espavel hacia el Cerco, LS 400702 570120, 560m, #52200, 19.v-19.vi.1998 ( C. Rojas) . Holotype in NHMUK .