First record of the Sulia glaesaria Simutnik, 2015 (Hymenoptera, Chalcidoidea, Encyrtidae) from Rovno amber

Sulia glaesaria Simutnik, 2015 (Chalcidoidea, Encyrtidae), originally described from late Eocene Danish amber, is reported in coeval Rovno amber. A revised diagnosis of this genus is provided based on the new specimen and high-resolution photomicrographs of the holotype. Some character states, such as a short radicle, clypeus with long lateral margins, the presence of a strigil and basitarsal comb, spur vein of the hind wing, costal cell of hind wing along entire marginal vein with single line of long setae, and almost vertical syntergum with abruptly reflexed extension apically are reported in this species for the first time.

New species of the fossil ant genus Drymomyrmex (Hymenoptera, Formicidae, Formicinae) from the late Eocene Rovno amber (Ukraine)

A new species of the fossil ant genus Drymomyrmex Wheeler, 1915, D. rasnitsyni sp. nov., is described from the late Eocene Rovno amber (Ukraine). This is the first find of a worker of this genus and the first record of Drymomyrmex in the Rovno amber. Based on the analysis of the morphological features of gynes and worker it is proposed to attribute Drymomyrmex to the tribe Plagiolepidini Forel, 1886.

A new species of the genus Holocentropus (Trichoptera: Polycentropodidae) from Rovno amber

A new caddisfly species Holocentropus tutkaktut sp. nov. (Polycentropodidae) is described from Priabonian Rovno amber (Upper Eocene, 33.9–37.8 million years old). With the new species, the family Polycentropodidae is represented in Rovno amber by 19 species, and the genus Holocentropus McLachlan, 1878, by nine species.

The first fossil Coleoptera record from the Volyn Region, Ukraine, with description of a new Glesoconomorphus (Coleoptera, Mycteridae) in syninclusion with Winterschmidtiidae (Acari) and a key to species

Glesoconomorphus ekaterinaesp. nov. (Coleoptera, Mycteridae), representing the first ever fossil species of Coleoptera from the Volyn Region of Ukraine and the first mycterid from late Eocene Rovno amber, is described and illustrated. A key to species of the fossil mycterid genus Glesoconomorphus Alekseev, Pollock & Bukejs, 2019 is presented. The systematic position of Glesoconomorphus within Eurypinae J. Thomson, 1860 is briefly discussed. The oldest finding of phoretic Winterschmidtiidae Oudemans, 1923 mites, found on the type specimen of the new beetle species, is reported.

A new species of the fossil genus Electrotrichia (Insecta: Trichoptera: Hydroptilidae) from Rovno amber (Zhytomyr region, Olevsk locality)

Recent discoveries of amber deposits have resulted in numerous new caddisfly species of Rovno amber described in a series of recent papers (Melnitsky & Ivanov, 2010, 2013, 2016a, b). The list of species previously known from Rovno amber included 42 species (Ivanov et al., 2016; Perkovsky, 2017). Our study is based on a collection of Trichoptera from a new Rovno amber locality near Olevsk in Zhytomyr region. Nine amber species have been reported from this region (Legalov et al., 2021; Radchenko et al., 2021), including new ant species, a new anthribid, two new genera, and four new species of gall midges (Fedotova & Perkovsky, 2015, 2017); additional new cicadellid genus and species is described from closely connected fauna of Perebrody (Dietrich et al., 2021). It total, the new collection includes 6 pieces of Rovno Amber with six specimens of Trichoptera, two of those are described below as a new species of Electrotrichia.

A new leafhopper (Hemiptera: Cicadellidae) from late Eocene Rovno amber described based on an adult and associated last-instar nymph from Perebrody (Ukraine)

Rovnoxestus rasnitsyni gen. & sp. nov. is described from Eocene Rovno amber based on an adult female and fifth-instar nymph collected at a recently discovered locality at Perebrody, Rovno Province, Ukraine. The new fossil taxon is tentatively placed in Aphrodinae and resembles Xestocephalites Dietrich & Gonçalves from Eocene Baltic amber but has the hind femur macrosetal formula 2+2+1 and hind tarsomere I in both nymph and adult with an elongated inner preapical seta. This is the first species of Eocene leafhopper for which both the adult and nymph are described in detail.