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

Abstract

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.

First fossil species of ship-timber beetles (Coleoptera, Lymexylidae) from Eocene Rovno amber (Ukraine)

“…Late Eocene Rovno amber from Ukraine is the southern coeval of the famous Baltic amber (Sokoloff et al 2018), and more than 300 arthropod species have already been described from there (Perkovsky 2018;Bukejs et al 2020;Colombo et al 2021aColombo et al , 2021bKhaustov et al 2021a, 2021b andreferences therein). Fewer than 48% of Rovno hymenopteran species (Simutnik et al 2020(Simutnik et al , 2021Colombo et al 2021aColombo et al , 2021bColombo et al , 2021cRadchenko et al 2021, our data), 32% of caddisfly species (Melnitsky et al 2021a(Melnitsky et al , 2021b(Melnitsky et al , 2021c, 24% of Nematocera (Giłka et al 2021), and less than 15% of beetle species (Legalov et al 2021a(Legalov et al , 2021bKirichenko-Babko et al 2021, 2022Kupryjanowicz et al 2021;Lyubarsky and Perkovsky 2021;Telnov et al 2021;Tshernyshev and Perkovsky 2021;Perkovsky et al 2022;this paper) are shared with Baltic amber fauna. Nearly all studied Rovno amber inclusions from the Rovno Region were collected from Klesov and the Horyn River Basin (Perkovsky et al 2010;Perkovsky 2017a;Mitov et al 2021), except new collections from Varash District (former Vladimirets and Zarechnoye Districts) in the Rovno Region and the former Manevichi District in the Volyn Region (Styr, Veselukha, and Stokhod River Basins).…”

A new species of Bocchus from upper Eocene Rovno amber (Hymenoptera, Dryinidae)

“…The new Bocchus described here is the first hymenopteran and seventh named fossil arthropod from the Volyn Region, Ukraine (Martynov et al 2021;Telnov et al 2021;Legalov et al 2022). The discovery of B. rex is indicative of the richness of Bocchus species in Rovno amber in comparison with Baltic amber: two species (29% of all dryinid species) in Rovno amber versus one (4.8% of all dryinid species) in Baltic amber.…”

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

“…It appears highly likely that the comparatively warmer climate of the Rovno amber forest [ 67 ] was more favourable to xenoscelines and many other thermophile forms [ 53 ] and references therein than the Baltic one, and this is the reason for their comparatively high diversity in the Rovno coleopterofauna [ 37 , 38 , 42 , 45 , 52 , 53 , 57 , 59 , 68 , 69 , 70 ].…”

“…Rovno amber biota was reviewed in [ 22 , 23 , 24 ], [ 25 ] and references therein). More than 70 beetle species from 35 families [ 17 , 19 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ] are reported; less than 15% of Rovno beetle species are known from Baltic amber [ 53 , 54 , 55 ] and references therein.…”