Only a half of Species of Hymenoptera in Rovno Amber Fauna is Common with Baltic Amber

Abstract

A list of all 117 hymenopteran species recorded from Rovno amber is presented for the fi rst time. Th is list includes 50 named species (43 %) known only in Rovno amber fauna. Of the remaining species, 59 (50 %) are recorded also from Baltic amber, 37 (32 %) from Bitterfeld amber, 26 (22 %) from Scandinavian amber as well. Half of the species (50 %) are known on both sides of the Subparathetys (that is, recorded in Baltic amber as well), and another half is recorded only to south of the Subparathetys (from the Rovno, Bitterfeld and Scandinavian amber only). One subfamily, Eucoilinae Th omson, one tribe, Protomicroidini Antropov, and 19 genera (Archaeocercus Simutnik, Archaeogryon Kononova & Simutnik, Astigmaton Kasparyan, Boltonidris Radchenko & Dlussky, Dipriocampe Bouček, Disogmus Főrster, Fallomyrma Dlussky & Radchenko, Foveorisus Martynova, Lissonota Khalaim, Pristomyrmex Mayr, Protomicroides Antropov, Pseudidris Kononova, Pseudotelea Kononova, Rovenosa Khalaim, Rovnoecus Antropov, Rovnoeucoila Buffi ngton & Perkovsky, Rovnosoma Simutnik, Sierola Cameron, Trjapitzion Simutnik) are recorded only from south of the Subparathetys. Th ese data provide evidence supporting the previously proposed suggestion on the diff erent origin of four main European sources of succinite. Th e data mentioned above confi rm that the source area of the Rovno amber, contrary to the Baltic amber, had been situated southwards from Subparathetys. Platystasius gracilis Kononova & Simutnik and Oxyserphus obsolescens (Brues) are recorded for the fi rst time respectively from Baltic and Scandinavian amber.

The first Eocene species of Bacanius (Coleoptera: Histeridae: Dendrophilinae) from Rovno amber

“…Moreover, five sixth of all these species are restricted by tropical regions in the distribution. Thus, with high probability we can assign the new species to a group of taxa which had the northern distribution boundary at the late Eocene lying along the southern coast of the Subparathetys [Perkovsky, 2018;Dubovikoff et al, 2020;Legalov et al, 2018, 2019, andreferences therein]. Many thermophile insects have the same northern boundary of the distribution.…”

“…It explains the absence of species shared by both, Rovno and Baltic amber, within the families of the Rovno amber fauna with high portion of the thermophile taxa, e.g. among 14 bethylid species registered in Rovno amber one species only from extant Chilean genus Lytopsenella Kieffer, 1911 was recorded also in the Baltic amber [Perkovsky, 2018;Colombo et al, 2020;our unpublished data], and many of these bethylid genera are strongly thermophile [Colombo et al, 2020].…”

Efesus trufanovi Simutnik gen. et sp.n. (Hymenoptera: Chalcidoidea: Encyrtidae) from late Eocene Danish amber

“…Size of representative collection well correlate with probability to find new ant species, because not less than 89% of specimens in all representative collections belong to 20 species, known from all four Priabonian ambers [Dlussky, Rasnitsyn, 2009;Perkovsky, 2016Perkovsky, , 2018. These 20 species are mostly dominant or at least permanent species of amber forests communities [Dlussky, Rasnitsyn, 2009].…”

First species of Ephistemus (Coleoptera: Clavicornia: Cryptophagidae) from Baltic amber

“…The climate of the southern coast of Subparathetys was much warmer than that of the Baltic amber forest [Wolfe et al, 2016;Mänd et al, 2018;Sokoloff et al, 2018;Perkovsky, Olmi, 2018;Perkovsky, 2018], which determined a much higher share of the tropical elements in the fauna [Perkovsky, 2013[Perkovsky, , 2016[Perkovsky, , 2017. Some tropical elements from Bitterfeld and Rovno amber, e.g.…”