Eocene Of Ukraine Research Articles

‘Where there are many cattle’ in the Eocene of Ukraine: Review of Ambositra Masner (Hymenoptera, Diapriidae, Ambositrinae) from Rovno amber, with the description of three new species

Three species of the genus Ambositra: A. epicnemia sp. nov., A. bicarinata sp. nov. and A. masneri sp. nov. are described from Eocene Rovno amber. The new combination Ambositra villumi (Brazidec & Vilhelmsen) comb. nov. is suggested for the extinct diapriid wasp Basalys villumi described from Baltic amber. The female of A. villumi is described. A detailed illustration of the single extant species Ambositra famosa Masner and the original illustrated key for all known Ambositra species is given. The diagnosis of the genus Ambositra is clarified.

The first neotropical ground beetle (Coleoptera, Carabidae) from the Eocene of Ukraine: finding the first Old World ant nest beetle related to Eohomopterus in the Rovno amber

ABSTRACTThe first record of the tribe Paussini Latreille is reported based on a specimen from late Eocene Rovno amber. It is the first known close relative of the genus Eohomopterus (subtribe Carabidomemnina) in the Old World. The recent and Neogene distribution of Eohomopterus is Neotropical, with extant representatives in Ecuador, Brazil and the West Indies, and extinct species in Dominican and Mexican amber. The occurrence of the Neotropical Carabidomemnina in Rovno amber and the presence of the Oriental Protopaussini in Dominican amber are of significant interest as evidence of the probable transarctic migrations of their ant host in the early Eocene.

Diverse bone microanatomy in cetaceans from the Eocene of Ukraine further documents early adaptations to fully aquatic lifestyle

Basilosauridae, fully aquatic archaeocetes from the Eocene, had osteosclerotic or pachyosteosclerotic structure of ribs and, sometimes, other bones. Such a structure is far different from osteoporotic-like bones of modern cetaceans. A microanatomical and histological study was conducted on axial and limb skeleton of several basilosaurid specimens assigned to the genus Basilotritus, from Bartonian (late middle Eocene) deposits of Ukraine, remarkable for its pachyostotic bones. The postcranial skeleton of these specimens is a complex mosaic of diverse types of bone structure, which include pachyosteosclerotic, osteosclerotic and cancellous elements. The vertebrae have a pachyostotic layered cortex reaching its greatest thickness in the lumbar region. This cortex was strongly vascularized, and its layered structure is due to concentric circles mostly made by longitudinal vascular canals, in addition to cyclical growth lines. Heavy bones are concentrated in the dorsal and ventral areas. Swollen distal ends of thoracic ribs are interpreted as serving as ballast in the ventral area, as also previously proposed for Basilosaurus cetoides. Cortical bone tissue in vertebrae and ribs showed signs of intensive resorption and remodeling. This indicates the use of the axial skeleton not only for buoyancy control but also possibly for calcium and phosphorus recycling.

Poliaenus europaeus n. sp., the first cerambycid from Rovno amber (Coleoptera Cerambycidae)

ABSTRACT The first cerambycid from Eocene Rovno amber, Poliaenus europaeus n. sp. (Lamiinae, Pogonocherini) is described. The new species is the first known fossil of Poliaenus Bates, 1880, as well as the first representative of this genus in Europe. Relations with extant species and with the putative hosts of this fossil are discussed, leading to suppose the presence of Abies in Eocene of Ukraine. urn:lsid:zoobank.org:pub:0E67C646-09FE-4789-94A5-313EAB48B797

Redescription of Chama clavaticostata Klushnikov (Bivalvia) from the Middle Eocene of Ukraine

Redescription of Chama clavaticostata Klushnikov (Bivalvia) from the Middle Eocene of Ukraine

New Species of Cardiidae (Bivalvia) from the Eocene of Ukraine

Three new species of bivalves of the family Cardiidae are described from the Paleogene of Ukraine: Freneixicardia picturata (Upper Eocene, town of Dnepr), Loxocardium marmoreum (Middle Eocene, the town of Kanev), and Schedocardia imperfecta (Middle Eocene, town of Ingulets). The species Loxocardium denticostatum (Berezovsky, 1998) is redescribed, because its first description was based on specimens (besides the types), which are assigned in this work to the new species L. marmoreum.

New Species of the Genus Chelotia (Pleurotomariidae, Gastropoda) from the Middle Eocene of Ukraine

new species of the genus Chelotia, C. pervicina sp. nov., from Middle Eocene deposits of the southern outskirts of the town of Krivoi Rog (Ukraine) is described. This species is compared with the most similar species C. concava (Deshayes) based on studying Chelotia specimens from the collection of the National Museum of Natural History (Paris, France).

Taxonomic Composition of Gastropods from the Mandrikovka Beds of the Upper Eocene of Ukraine: Species List

The results of long-term collecting and investigation by the author of the composition of Upper Eocene gastropods from the Mandrikovka Beds in the vicinity of Dnepr (former Dnepropetrovsk) are generalized in the form of table. The mollusk assemblage from these beds exceeds in richness and preservation all other Paleogene assemblages of the former USSR. Gastropod assemblages from two main localities of the Mandrikovka Beds, the village of Mandrikovka and Rybalsky granite quarry, are compared. The collection of the Rybalsky assemblage is divided by years to examine features of their distribution in enclosing deposits. The last assemblage is richer, with the considerable prevalence of small-sized species obtained by washing in sieves. This method of collecting is the main cause of a greater diversity of this assemblage. However, large species, which only occur in one locality, are also present. The extremely rich Paleogene fauna from these strata undoubtedly needs further revision. The table contains the data on the revision of particular groups, including that performed by the author; references to published figures; comparisons with the species names in the monograph of Klucznikov (1958). The text provides comparisons with the richest Eocene assemblages.

New Species of Crassatellidae (Bivalvia) from the Middle Eocene of Ukraine

Three new species of Crassatellidae: Crassatella ballista sp. nov., C. calva sp. nov., and Eucrassatella depulsoris sp. nov. from the Middle Eocene deposits of the western slope of the a quarry of the Ingulets Ore Mining and Processing Enterprise (Ingulets, Ukraine), which are correlated with the Lutetian Stage, are described. The study of valves of Crassatella parisiensis Orbigny, 1852 from the Middle Eocene deposits of the Parisian Basin has shown that it differs from the species C. illustris Berezovsky, 2004, which was previously described as a subspecies of C. parisiensis. The study of variation of Crassatellidae provided substantiation of the species rank of C. artacosta Berezovsky, 2004, which was previously described as a subspecies of C. densicostata Berezovsky, 1998.

New Species of Crassatina (Bivalvia) from the Middle and Upper Eocene of Ukraine

Representatives of the genus Crassatina from the Upper Eocene Mandrikovka Beds in the vicinity of Dnepr (former Dnepropetrovsk) are discussed and figured. From the Mandrikovka assemblage, two new species, C. conquisita and C. insolita, are described. One more new species, C. subcostata, is described from the Middle Eocene deposits of southern suburbs of Krivoi Rog. Two species, C. raricostata (Klushnikov) and C. expolita (Klushnikov), which were originally established as varieties, are redescribed and their species rank is substantiated.

Some New Species of Crassatella (Bivalvia) from the Upper Eocene of Ukraine

Three new bivalve species of Crassatella (C. necopina sp. nov., C. personata sp. nov., C. singulata sp. nov.) from detrital sand of the Rybal’sky quarry of Dnepropetrovsk are described. Based on the study of additional material, the subspecies C. (C.) parisiensis Orbigny duplex Berezovsky, 2004 is ranked species (Upper Eocene; Ukraine Dnepropetrovsk, Rybal’sky quarry, Mandrikovka Beds).

Microlimus and Simbosia (Limidae, Bivalvia), two new genera from the Upper Eocene of Ukraine

Two new bivalve genera and three new species of the family Limidae from the Upper Eocene of Ukraine are described.

New bivalves of the family Mytilidae from the Middle Eocene of Ukraine

Two new genera and two new species of Mitilidae, Admytilus alius sp. nov. and Assytilus alpha sp. nov., from the Middle Eocene of a quarry near the town of Ingulets, Ukraine, are described.

New species of Limopsis (Bivalvia) from the Upper Eocene of Ukraine

Five new bivalve species (Limopsis obscura, L. indubia, L. lacunosa, L. pretiosa, and L. quadrata) from the Upper Eocene of Ukraine (Dnepropetrovsk, Rybal’sky quarry, Mandrikovka Beds) are described.

Venignia, a new genus of Arcidae (bivalvia) from the Upper Eocene of Ukraine

A new bivalve genus and species, Venignia arcula gen. et sp. nov. of the family Arcidae from the Upper Eocene of Ukraine is described.

Siptionella, a new bivalve genus of Parallelodontidae from the Upper Eocene of Ukraine

A new genus of the family Parallelodontidae (Bivalvia: Arcoidea), Siptionella gen. nov., with four species from the Upper Eocene of Ukraine and Germany and the Maestrichtian of Denmark is described. From the Upper Eocene of Ukraine, two species, the type species of the genus S. prompta (Berezovsky, 2002), previously described by the author within the genus Porterius, and the new species S. demissa sp. nov. are described and figured.

New species of the genus Acar (Bivalvia) from the Eocene of Ukraine

New bivalve species of the genus Acar from the Upper Eocene of Dnepropetrovsk (Ukraine) are described. The differences in ontogenetic development of these species from the close genus Barbatia are discussed.

The first reliable record of fossil leatherback sea turtle (Dermochelyidae) in northern Eurasia (Middle Eocene of Ukraine)

Plates of the epithecal bony shell of turtles of the family Dermochelyidae from the Middle Eocene (Lutetian) of the Ak-Kaya locality (Crimea, Ukraine) are described. This material, determined as Dermochelyidae indet., is the first reliable record of fossil dermochelyids in northern Eurasia.

Biting midges (Diptera, Ceratopogonidae) in amber forest communities based on analysis of syninclusions in Late Eocene Rovno amber

Over 2,500 pieces of unselected Rovno amber (Late Eocene of Ukraine) are studied for their contents of syninclusia depending on amber piece weight class and taxonomic position of syninclusion components. Unlike previous publications (Perkovsky et al. 2010a, 2012), ceratopogonid components enter analysis separately (as genera or genus groups) rather than as entire taxon. This changes the resulting pattern drastically. Instead of two correlation pleiades, the air-plankton one (include biting midges), and the ‘Sciarazone’ dwellers, we have six pleiades now depending on developmental environments (terrestrial saprotrophsvs. aquatic) and adult behavior (low level fliers and tree trunk visitorsvs. air plankton and others which show no preference to tree trunks). Causes of some differences are uncertain.

A new genus and species of Pelagornithidae with well-preserved pseudodentition and further avian remains from the middle Eocene of the Ukraine

ABSTRACT We describe new avian remains from the middle Eocene of eastern Ukraine. The material includes well-preserved bones of a small species of Pelagornithidae (bony-toothed birds), which was tentatively identified as Odontopteryx toliapica in an earlier study. The Ukrainian pelagornithid is, however, distinguished from this species and other early Eocene pelagornithids in several features, and we describe it as Lutetodontopteryx tethyensis, gen. et sp. nov. The new material includes the most complete pseudodentition of a small Paleogene pelagornithid, and details of pseudotooth morphology strengthen previous assumptions that the pseudodentition of pelagornithids derives from tooth-specific developmental programs and is homologous to true avian teeth on a molecular level. Most major postcranial bones of L. tethyensis are represented by well-preserved bones, and in some derived morphological features the Ukrainian species agrees with Neogene pelagornithids but differs from the early Eocene Dasornis species. We also report a partial sternum of a much larger bony-toothed bird, which resembles the sternum of the middle Eocene Gigantornis eaglesomei. We further describe previously unknown skeletal elements of the loon Colymbiculus udovichenkoi (Gaviiformes), which show that this species substantially differs, in both wing and leg morphology, from the well-known gaviiform stem-group taxon Colymboides.