New Records of Upper Eocene Chrysidoid Wasps (Hymenoptera: Chrysidoidea) from Basins of Styr and Stokhod Rivers (Rovno Amber)

A golden age for ectoparasitoids of Embiodea: Cretaceous Sclerogibbidae (Hymenoptera, Chrysidoidea) from Kachin (Myanmar), Charentes (France) and Choshi (Japan) ambers

“…The fauna of Burmese amber forest was even richer, with 12.7% of Sclerogibbidae (7 from 55 species). Burmese amber bethylids are very understudied, but we can usefully compare the diversity of Burmese sclerogibbids and dryinids, which are nearly equally studied: the number of described Burmese dryinids is only 2.9 times higher than the number of sclerogibbids (Martynova et al, 2019b). The latter is incomparable to the ratio of the extant fauna.…”

“…Of course, the amber was deposited from a huge territory during thousands (or rather tens of thousands) of years; still, its relative diversity is notably greater than that of any other extant or fossil fauna. Martynova et al (2019b) showed that Sclerogibbidae were previously known to comprise only 20 extant species out of 7438 extant chrysidoids (0.27%), and only four species from 198 fossil chrysidoids (2%). Furthermore, the Cretaceous fauna had a comparatively higher percentage of sclerogibbids (2 of 87 species, 2.3%) (Martynova et al, 2019b;Colombo et al, 2020;Zhang et al, 2020) which significantly increases with transfer of Chosia and descriptions of new taxa herein (10 of 95 species, 10.6%).…”

Figure 1 from: Simutnik SA, Perkovsky EE, Vasilenko DV (2020) First record of Leptoomus janzeni Gibson (Hymenoptera, Chalcidoidea) from Rovno amber. Journal of Hymenoptera Research 80: 137-145. https://doi.org/10.3897/jhr.80.58882

“…The amber containing the specimen of L. janzeni was found at the village of Velyki Telkovichi (Vladimirets Distr., Rovno Region, Ukraine) and is housed at the Schmalhausen Institute of Zoology of the National Academy of Sciences of Ukraine, Kiev (SIZK). The localities and composition of the Rovno amber fauna were recently characterized in a series of reviews by Perkovsky et al 2010 (Perkovsky and Olmi 2018;Martynova et al 2019;Mamontov et al 2020) or from Baltic and Bitterfeld ambers Perkovsky 2018, 2020).…”

“…,Jałoszyński and Perkovsky (2016),Perkovsky (2016Perkovsky ( , 2018 andMartynova et al (2019). Including Ektopicercus punctatus Simutnik(Simutnik and Perkovsky 2020), and L. janzeni, 135 species of Hymenoptera are now known from Rovno amber, with 66 (49%) in common with Baltic amber(Radchenko and Perkovsky 2020; this paper).Nearly all studied Rovno amber inclusions from Rovno Region were collected from Klesov and the Horyn River Basin(Perkovsky et al 2010; Perkovsky 2017) except new collections from the more western basins of the Styr and Stokhod rivers and especially the Veselukha River floodplain between them (Lyubarsky and Perkovsky 2020).…”

First record of Embolemus tauricus (Hymenoptera: Embolemidae) at continental Ukraine

“…Fossil representatives of embolemid wasps are eleven described species: six of them belong to extinct genera †Baissobius Rasnitsyn 1975, †Cretembolemus Olmi et al 2014 and †Embolemopsis Olmi, Rasnitsyn et Guglielmino, 2010; five more species are assigned to extant genera Embolemus and Ampulicomorpha. The palaeontological chronicle records Embolemidae starting from Lower Cretaceous (Aptian) and includes imprints from Orapa, Bon-Tsagaan and Baissa and specimens fossilized in Burmese, Alava, Baltic, Rovno and Dominican ambers (Martynova et al, 2019).…”