Electroanellus belokobylskiji Simutnik, 2023

Simutnik, Serguei A. & Perkovsky, Evgeny E., 2023, Description of a new genus and species of Encyrtidae (Hymenoptera: Chalcidoidea) from Danish amber, based on a male specimen featuring an antenna with a distinct anellus, Zootaxa 5369 (3), pp. 437-445 : 442-443

Electroanellus belokobylskiji Simutnik , sp. nov.

urn:lsid:zoobank.org:act:ED01E0F0-6C19-4BD0-A32C-9C5479395E3D

Figs 1–4

Material. Holotype, NHMD 1183713 , ♁, №14, 24–1–1963; Chalcidoidea; B. V. Henningsen; Danish amber, late Eocene (deposited in NHMD). The inclusion is in a reddish, not very transparent parallelepiped piece of amber (ca. 9 × 5 × 3 mm). It is well preserved, but the ventral side of its gaster is obscured by an air bubble ( Figs 1B , 4A, B ).

Syninclusions: absent.

Etymology. The new species is named in honor of our friend, hymenopterist Dr. Sergej A. Belokobylskij.

Description. Male. Habitus as in Figs 1A, B ; 3A . Body length 1.25 mm.

Coloration. Body dark, unicolourous although its true color not determinable because it is completely covered with a thin, shiny layer of air, antennae unicolourous, dark; tegula black; wings hyaline, venation brown, forewings with small darkened area below marginal vein.

Sculpture. Head, pronotum, mesoscutum, scutellum and axillae relatively similarly reticulate, without piliferous punctures; scape, pedicel, tegula, and legs also relatively similarly but finely reticulate; sculpture of face, interantennal prominence as in Figs 2A, B .

Head. Slightly wider than mesosoma in dorsal view; occipital margin rounded ( Fig. 2D ); frontovertex broadly rounded in frontal view, about as long as broad, slightly vaulted above eyes ( Fig. 2B ); eyes bare, without visible setae, with inner orbits ventrally strongly divergent ( Figs 2A, B ); ocelli forming equilateral triangle, posterior ocelli closer to eye than occipital margin; OOL shorter than posterior ocellar diameter; OOL:POL:LOL about 1:4:4; eye reaching occipital margin ( Figs 1A , 3 ); antennal scrobes distinctly carinate, as in Fig. 2A , meeting dorsally, not extended to anterior ocellus, interantennal prominence as in Fig. 4 , dorsally rounded; antennal toruli located in middle between level of lower eye margin and mouth margin ( Figs 2A, B ); distance between toruli equal to distance between torulus and eye, about 2× width of torulus and about 0.5× length of malar space; malar space with complete malar sulcus ( Fig. 2A ), about as long as eye height; clypeus poorly emarginate, with short lateral margins; mandible apparently either 3-dentate or with 2 teeth and truncation of upper tooth ( Figs 2A, B ).

Antenna. Geniculate, with one anellus, 6 funicular segments, and entire clava; radicle short, about 2× as long as broad ( Fig. 2B ), rest of scape ~5× as long as broad, slightly flattened; pedicel as long as first three funicular segments combined, longer than any funicular segments; F1 broader than long, F2–F5 almost quadrate, F6 slightly broader than long; width of flagellomeres gradually increases toward apex; all segments of funicle, at least F2–F6, and basal part of clava with multiporous plate sensilla; clava as long as F4–F6 combined, with small oblique truncation at apex ( Figs 2 A–D ), slightly wider than F6; setae on pedicel and flagellum shorter than diameter of segments, oblique apical truncation of clava with longer and denser pubescence.

Mesosoma. Pronotum short in dorsal view, not conspicuously narrower than mesoscutum, almost vertical in lateral view, with posterior edge emarginate ( Fig. 3A ); mesoscutum broader than long in dorsal view; mesothoracic spiracle open, not concealed beneath pronotum ( Fig. 2D ); axillae meeting; scutellum as long as mesoscutum, without long setae at own apex ( Fig. 3A ); propodeum short.

Wings. Fully developed. Fore wing ~2.2× as long as broad; linea calva without filum spinosum, line of covering setae alongside basal margin of dorsal surface poorly developed ( Fig. 3B ); parastigma only slightly wider than rest of submarginal vein, hyaline break present; marginal vein as long as broad, widened, 2× as broad as postmarginal vein; stigmal vein 2.4× as long as marginal, with widened stigma, and with long narrow uncus consisting row of 3 sensilla ( Fig. 3B ); postmarginal vein 2.6× as long as marginal vein, longer than stigmal vein ( Figs 3A, B ); enlarged seta marking apex of postmarginal vein of forewing absent (as long as others on that vein); fringe setae short. Hind wing relatively wide; membrane of costal cell along marginal vein without line of long setae.

Legs. Normal in size, mesotibial spur about as long as mesobasitarsus or only slightly shorter, both relatively long; tarsi 5-segmented.

Metasoma. Shorter than mesosoma; cerci in apical third of metasoma, with long setae ( Figs 1B , 4 : cers); apical tergum longer than other terga; genitalia as in Fig. 4 , digitus with 3 small teeth.

Female. Unknown.

Figures

FIGURE 1. Electroanellus belokobylskiji, holotype male A body, dorsolateral view (anl—anellus, cer—cercus), B body, ventrolateral view (dig—digitus, cers—cercal setae).

FIGURE 2. Electroanellus belokobylskiji, holotype male: A, B head, antennae, mandible, anterolateral view C left antenna D head, mesosoma, dorsolateral view. Scale bars: 0.1 mm (A–C); 0.2 mm (D).

FIGURE 3. Electroanellus belokobylskiji, holotype male: A body, dorsal view (dm—depression on mesoscutum) B wings. Scale bars: 0.5 mm (A); 0.1 mm (B).

FIGURE 4. Electroanellus belokobylskiji, holotype male: apex of gaster, ventral view (ab—air bubble, adg—aedeagus, cers— cercal setae, dig—digitus, phl—phallobase). Scale bar: 0.1 mm.