Iteaphila rovnoensis Shamshev, Vorontsov & Perkovsky, 2026, sp. nov.

Iteaphila rovnoensis sp. nov. (Figs 1, 2) Type material. Holotype, ♂, SIZK K-25310, Rovno amber, late Eocene. The holotype is in a subrectangular lightyellow piece of amber (5 × 4 × 1.5 mm) consisting of two pieces glued by epoxy; without syninclusion(s). The two fragments were not precisely aligned, which resulted in a double (parallel) image of the right wing venation. Otherwise, the specimen is complete and in relatively good condition. The original amber piece before trimming weighed 0.9 g. Locality and horizon. Pugach quarry, Klesov, Rivne (= Rovno) Province, Ukraine; Rovno amber, late Eocene (Priabonian). Etymology. The specific name refers to the type of amber. Diagnosis. Relatively small species (body about 2 mm) with vein R 4+5 branched, distinguished by the following set of characters: postpedicel rather broad at base, nearly 3 times longer than wide at base, smoothly tapered; proboscis with labium somewhat shorter than head height; palpus two-thirds length of labrum; epandrium with narrow dorsal bridge, produced distally and sharply tapered into slender surstylus; apex of surstylus sharply pointed and slightly arched medially; phallus strongly curved at apex. Description. Male (Fig. 1). Wing length 2.2 mm. Head black in ground-colour, black setation, occiput brownish grey pruinose. Eyes holoptic, with upper ommatidia enlarged. Frons represented by small triangular space just above antennae, bare, brownish grey pruinose. Ocellar triangle prominent, with 2 moderately long, thin, proclinate setae. Postvertical and postocular setae rather long, thin; additionally, occiput covered with numerous similar setae on lower part. Antenna (Fig. 1B, inset) black; scape short, subequal to globular pedicel, both with short setae; postpedicel rather broad at base, nearly 3 times longer than width at base, smoothly tapered; stylus very short, sensillum-tipped; single article tubular, about as long as wide, apical sensillum nearly as long as article. Proboscis moderately long, projecting oblique; labium somewhat shorter than head height; palpus narrow, projecting parallel to labrum, two-thirds length of labrum. Thorax dark brown; scutum in dorsal view rather subshiny, finely brown pruinose, without visible vittae; mesopleuron greyish pruinose. Proepisternum with a few short, fine setae. Postpronotal lobe with 1 long and several short setae. Mesonotal setae: acrostichals short, biserial, arranged in 2 closely spaced irregular rows, lacking on prescutellar depression; dorsocentral setae uniserial, slightly longer than acrostichals, 2–3 distinct prescutellars; 1 posthumeral, 1–2 presutural supra-alars (with some additional setulae), 3 long notopleurals, several postsutural supra-alar setulae, 1 postalar, 5 pairs of scutellar setae. Legs, including coxae, brownish. Coxae and trochanters with unmodified hair-like setae. Fore and mid femora with short, hair-like setae. Hind femur with long anteroventral and dorsal setae along whole length (anteroventral setae mostly nearly as long as femur depth, shorter close to base). Tibiae with short setae. Tarsomere 1 of mid and hind legs with pair of rows of stiff ventral setae; tarsomere 5 not flattened on all legs; pulvilli broad, shorter than tarsal claw. Wing uniformly, finely infuscate; basal costal seta absent; pterostigma distinct, brownish, elliptical, overlapping apex of R 1; anal lobe very prominent, acute. Sc complete; R 2+3 slightly bowed posterior to pterostigma; R 4+5 branched (radial fork present), V-shaped, branched well proximal to apex of vein R 2+3; distance between apices of veins R 2+3 and R 4 shorter than that between veins R 4 and R 5; cell dm broad, longer than basal cells, nearly truncate, slightly produced apically; base of M 2 (crossvein) nearly 1/5 length of dm-m (= m-m) crossvein, M branches widely separated; dm-m crossvein slightly concave. Apex of cell cua recurved; CuA+CuP long, faint, ending short of wing margin. Halter brown. Abdomen brown, greyish pruinose; covered with long, fine, brownish setae. Terminalia (Fig. 2) concolorous with abdomen, small. Epandrium not greatly inflated laterally, covered with numerous short setae; dorsal bridge narrow; epandrial lobe produced distally and sharply tapered into slender surstylus; apex of surstylus sharply pointed and slightly arched medially. Hypandrium with numerous moderately long setae, rounded, upcurved apically, apex narrow and truncate; postgonites invisible (probably short). Phallic guide short, not extended beyond epandrium, apex narrow, rather truncate. Phallus strongly curved at apex. Cercus moderately long, narrow; apex broadly rounded, extended free from epandrium; hypoproct process long, slender, slightly longer than cercus. Female. Unknown. Remarks. Within the key to genera and species groups (males only) of Iteaphilidae Iteaphila rovnoensis sp. nov. would lead to the I. macquarti / oedalina species groups (Sinclair & Shamshev 2021). The new species is very similar to I. pumila Sinclair showing a Beringian distribution (mostly north-western North America, the Russian Far East and East Siberia as well as a record from the extreme north of the European part of Russia) (Sinclair & Shamshev 2012). Iteaphila rovnoensis sp. nov. differs from I. pumila by longer processes of the hypoproct (slightly longer than cercus versus much shorter than cercus (Sinclair & Shamshev 2012: fig. 8D)); hypandrium with apex narrow and truncate (broadly rounded apically, not produced in I. pumila); cercus moderately long, narrow, at least half length of epandrium (short quadrate, one quarter length of epandrium in I. pumila). In I. pumila, the male has holoptic eyes, not dichoptic as it was mistakenly indicated in the original description (Sinclair & Shamshev 2012: 42).