First record of the parasitoid family Ismaridae (Hymenoptera, Diaprioidea) from Eocene Baltic and Rovno ambers with the description of a new genus and two new species.

A new genus, Lubomirus gen. nov., of the family Ismaridae (Hymenoptera, Diaprioidea) from the late Eocene Baltic and Rovno ambers is described and illustrated. The new genus is the second known genus of the family Ismaridae. The two new species, Lubomirus masneri sp. nov. from Rovno amber and Lubomirus victori sp. nov. from Baltic amber, are described. The diagnosis of the Ismaridae family and the single extant genus of the familyIsmarus Halidayare clarified. The systematic position of Cretapria Fujiyama, 1994 is discussed.

A new amber representative of the genus Ectobius Stephens, 1835 (Blattodea: Ectobiidae) from Storeblt (Denmark).

A new fossil cockroach, Ectobius danekrae sp. nov., is described on the basis of a single male adult individual from late Eocene Danish amber. This is the third representative of the genus Ectobius Stephens, 1835 from Eocene ambers. The new species exhibits plesiomorphic characters of small right stylus and subsymmetrical claws, compared to the known fossil and living species of the genus. The references to Ectobius balticus (Germar et Berendt, 1856) and Margattea Shelford, 1911 sp. presence in Danish amber are insufficient.

Unexpected Diversity of Xenoscelinae in Priabonian European Amber: The Third Xenosceline Species from Rovno Amber.

Xenophagus simutniki sp. n. is described from a late Eocene Rovno amber specimen. The new species is similar to the fossil Xenophagus popovi Lyubarsky et Perkovsky, 2017 from the late Eocene Baltic amber (W Russia), differing in the medially notched anterior margin of the pronotum. The Rovno xenosceline fauna is the richest among both extant and extinct faunas. This fauna includes the extinct genera Xenophagus Lyubarsky & Perkovsky, 2017 and Xenohimatium Lyubarsky & Perkovsky, 2012, which are closest to the extant Mediterranean Xenoscelis Wollaston 1864 and the representative of the extant boreal genus Zavaljus Reitter, 1880. A key to extinct species of the subfamily Xenoscelinae is presented. The possible reasons of xenoscelines abundance in European amber forests are discussed.

Discovery of a new extinct spider wasp (Hymenoptera, Pompilidae) from Eocene Rovno amber.

Paleogenia waichertae Loktionov, Lelej et Perkovsky, sp. nov. is a new species of extinct spider wasps. This new species is a second record of Pompilidae from Rovno amber, third yet known species of the extinct genus Paleogenia Waichert et Pitts, 2016 and 26th known extinct species of spider wasps. Sex of the holotype of the species Paleogenia indomini Colombo et Waichert, 2023 is clarified (male not female). A key to males of Paleogenia is provided.

Balticalcarus archibaldi Simutnik Gen. et sp. n. (Chalcidoidea, Encyrtidae) with the Unusually Small Mesotibial Spur from Baltic Amber.

Balticalcarus archibaldi Simutnik, gen. et sp. n., is described and illustrated based on a female specimen from late Eocene Baltic amber. The new genus is characterized by the absence of a filum spinosum, a "boat"-shaped hypopygium enclosing the ovipositor, reaching far past the apex of the syntergum, the presence of a line of long setae along the entire costal cell of the hind wing, and a transverse line of thickened setae alongside the hyaline spur vein. Moreover, like most previously described Eocene Encyrtidae, the new taxon differs from the majority of the extant ones by a number of morphological features. The new fossil differs from most extant and all known fossil Encyrtidae by its unusually small, thin, smooth (without microsetae) mesotibial spur.

Discovery of a new species of Dryinus (Hymenoptera: Dryinidae) from mid-Cretaceous Burmese amber.

Dryinus carsteni sp. nov. (Hymenoptera: Chrysidoidea: Dryinidae) is described from mid-Cretaceous Kachin (Burmese) amber. The new species is close to D. taron Martynova, Zhang, Olmi, Mller, Perkovsky, 2020, but it can be distinguished for the shorter body (about 2 mm), antennomere 3 about 5 as long as broad and protarsomere 2 produced into hook (in D. taron, the body is longer more than 5 mm, antennomere 3 is about 20 as long as broad and protarsomere 3 is produced into hook).

Discovery of the first apterous pincer wasp from amber, with description of a new tribe, genus and species of Apodryininae (Hymenoptera, Dryinidae).

Rovnodryinus khomychi new genus and new species is described from Upper Eocene Rovno amber (Ukraine). It is the first apterous pincer wasp found in amber. This new taxon is attributed to the subfamily Apodryininae and the new tribe Rovnodryinini. The key to the subfamilies and tribes of Dryinidae is modified to include the new tribe. The new genus, known by a female, is characterized by the mesosoma almost completely composed of fused sclerites, the absence of wings and the presence of ocelli in the anterior half of the face. A close relationship of the new genus with the extant Apodryininae is underlined. R. khomychi is the first apodryinine found in the Northern Hemisphere. The tribe Rovnodryinini is the first higher taxon known only from Rovno amber. Tritophania patruelis Jacobi and the tribe Elicini (Hemiptera, Fulgoromorpha, Tropiduchidae) are reported from Rovno amber for the first time.

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.

Glesoconomorphusekaterinae sp. 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.

First record of tiger beetles (Coleoptera, Cicindelidae) from Rovno amber, with the description of a new genus and species.

A new fossil tiger beetle species, Goriresina fungifora gen. n., sp. n. (Coleoptera, Cicindelidae), is described from Eocene Rovno amber. The new genus belongs to the subtribe Iresiina, tribe Cicindelini, due to the glabrous head, the labrum with six submarginal setae (latero-basal setae very long) and two apical teeth with notch between them, the glabrous and globular pronotum, the lack of setae on the metepisternum and metepimeron, as well as on the visible parts of abdominal sternites, the single long seta each on the fore- and mesotrochanter. The new species is characterized by the long and moderately convex labrum, two clypeal setae, the elongate and apicad converging elytra with an angularly, but smoothly rounded apex, the small and sharp sutural spine, the probable presence of an apical portion of the elytral humeral spot, a slightly sinuate, transverse medial fascia with an extended and downward directed apical portion, and a slightly transverse basal portion of the apical spot. This is the first record of a tiger beetle in Rovno amber and only a fourth well-preserved Cicindelidae from fossil resins.

A new species of Lonchodryinus (Hymenoptera, Dryinidae) from Upper Eocene Baltic amber.

Lonchodryinus groehni sp. nov. (Hymenoptera: Chrysidoidea: Dryinidae) is described from Baltic amber. The new species is close to L. balticus Olmi Guglielmino, 2012, but it can be distinguished for the different OPL/POL ratio and 2r-rsRs vein of the fore wing. A key to the fossil species of Lonchodryinus and a comparison with the extant species L. ruficornis (Dalman, 1818) are presented.

A new fossil species of the genus Parasinalda Heiss amp; Golub (Hemiptera: Heteroptera: Tingidae) from Upper Eocene Rovno amber.

Parasinalda sukachevae sp. nov. (Hemiptera: Heteroptera: Tingidae: Tinginae: Phatnomini) is described based on one specimen from Eocene amber of the Rovno region (Ukraine). Similarities and differences to closely related species Parasinalda baltica (Drake, 1950), P. froeschneri (Golub Popov, 1998), and P. groehni Heiss Golub, 2013 are discussed, and a key to the four known species of the genus is provided.

First Bocchus Ashmead (Hymenoptera: Dryinidae) from Upper Eocene Rovno amber: B. schmalhauseni sp. nov.

A new species of pincer wasps, Bocchus schmalhauseni sp. nov. (Dryinidae) is described from Rovno amber (Ukraine). The amber piece was collected in the Vladimirets District in the north-west of the Rovno region. Taking into account this new record, a total of five species of Dryinidae are registered from Rovno amber. A key to the fossil species of Bocchus Ashmead is presented. The possible reasons for the different distribution of Dryinus species on both coasts of Subparathetys are discussed.

A mid-Cretaceous land snail Euthema truncatellina sp. nov. (Caenogastropoda, Cyclophoroidea, Diplommatinidae) from Burmese amber.

Diplommatinidae Pfeiffer, 1857 is a speciose family of minute operculate land snails that includes more than 500 extant species occurring mainly in Southeastern Asia and northern Oceania with some species in tropical America and, arguably, in Madagascar (Kobelt 1902; Wenz 1938-1939; Haas 1961; Egorov. 2013; Yamazaki et al. 2013; Neubert Bouchet 2015; Nurinsiyah Hausdorf 2017; Páll-Gergely et al. 2017a; Greke, 2017). The fossil record of Diplommatinidae is very sparse; it was recorded from the Miocene of Poland (Harzhauser Neubauer 2018) and four species were recently described from Cretaceous Burmese amber, being the oldest known diplommatinids (Yu et al. 2018; Hirano et al. 2019; Bullis et al. 2020).