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Phytoplankton as sem blage -Mid dle Paleocene (Selandian) A -Fibrocysta ovalis (Hansen, 1977) Lentin & Wil liams, 1981, Yantarny P-1, depth 67.0 m; B -Samlandia sp., Yantarny P-1 depth 53.5 m; C -Spinidinium echinoideum (Cookson & Eisenack, 1960) Lentin & Wil liams, 1976, Yantarny P-1, depth 67.0 m; D -Palaeotetradinium silicorum (Deflandre 1936) Deflandre & Sarjeant, 1970, Yantarny P-1 depth 58.0 m; E -Palaeotetradinium minusculum (Al ber ti, 1961) Stover & Evitt, 1978, Yantarny P-1, depth 57.0 m; F -Alisocysta margarita (Harland, 1979) Harland, 1979, Yantarny P-1, depth 67.0 m; G -Damassadinium californicum (Drugg, 1967) Fensome et al,. 1993, Yantarny P-1, depth 54.0 m; H -Caligodinium aceras (Manum & Cookson, 1964) Lentin & Wil liams, 1973, Yantarny P-1, depth 59.0 m; I -Isabelidinium ? viborgense Heilmann-Clausen, 1985, Yantarny P-1, depth 60.0 m
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Lithological and palynological studies of Paleogene siliciclastic deposits from the Yantarny P-1 borehole located on the western coast of the Sambian Peninsula (Kaliningrad region, Russia) show that the succession is characterized by numerous
sedimentary discontinuities related to lithification horizons and erosional surfaces. Sedimentary gaps are...
Citations
... Ukrainian Rovno amber, alongside with Baltic and Bitterfeld amber, is a source of extensive knowledge about Eocene diversity for arthropods, fungi, and higher plants (including mosses and liverworts). Rovno amber is as old as Baltic and Bitterfeld amber (Perkovsky et al. 2010;Sadowski et al. 2017;Kasiński et al. 2020), however its extraction and the subsequent studies of the inclusions (organisms and/or their parts) in this amber have only begun relatively recently in comparison with Baltic and Bitterfeld amber. The study of liverworts from Rovno amber began with the description of several species of the genus Frullania Raddi (Konstantinova et al. 2012). ...
A new fossil leafy liverwort species is described based on its inclusion in Eocene Rovno amber. This species has morphology that is characteristic of extant representatives of the families Frullaniaceae and Jubulaceae, i.e., conduplicate-trilobed leaves with a ventral lobule forming a saccate-clavate watersac with its mouth directed towards the base of the stem, larger dorsal lobes and deeply bifid underleaves. The leaf lobes in the studied plant seem to be dentate near the apex, a character state together with the shape of the underleaves and the underleaf insertion, connects the new species with the Jubulaceae, particularly the extant genera Jubula and Neohattoria, rather than with the Frullaniaceae. The minute size of the fossilized plant, as well as the shape and size of the ventral lobules is reminiscent of Neohattoria, but the more distant lobule position and presence of terminal gynoecia with a single floral series of bracts having entire margins better fit species of Jubula. The fossil is therefore better placed in Jubula, as J. polessica sp. nov., based on its overall morphological similarity with extant members of that genus.
... The age of Baltic amber has been a subject of extensive debate, leading to the implementation of various methods that have yielded different results. For instance, glauconite dating has suggested a middle Eocene (Lutetian) origin for the amber, whereas microfossil dating has indicated a late Eocene (Priabon) timeframe 29 . ...
Until now, the genus Robsonomyia was represented by two extant species: R. reducta Matile & Vockeroth, 1980 from North America and R. sciaraeformis (Okada, 1939) from Asia. This paper presents the first fossil members of the genus Robsonomyia, which is also the first record from Europe. Two new fossil species from Baltic amber are described: R. baltica Pełczyńska, Krzemiński & Blagoderov, sp. nov. and R. henningseni Pełczyńska, Krzemiński & Blagoderov, sp. nov.. The presence of fossil Robsonomyia spp. on the European continent suggests Holarctic distribution of the genus in the past. We also discuss possible pathways of its intercontinental dispersion.
... This study is based on a single inclusion in Baltic amber, based on pollen and dinoflagellate dated upper Eocene, 41.2-33.9 Ma, Bartonian/Priabonian (Kasiński et al., 2020), deposited in the collection of the Geological and Paleontological Institute and Museum (GPIH), Museum of Nature, Leibniz Institute for the Analysis of Biodiversity Change, Hamburg, Germany. Photographs were made with a Leica M205 C stereomicroscope equipped with a Leica DMC5400 camera. ...
A new genus and species of Atelestidae was found in the Eocene amber. This new taxon is described and illustrated, together with a key to extant and extinct European genera of Atelestinae.
... Some authors (Lukashina, 2010;Kasiński et al., 2020) mention multiple finds of sponges, echinoid spines, diatoms, and a large number of fish teeth from the Lubava deposits, but they have not been studied by specialists. ...
This paper discusses the current state of knowledge of Paleogene stratigraphy of Kaliningrad
Oblast, the age of local stratigraphic units and the duration of possible gaps in deposition and proposes trends
for future regional Paleogene stratigraphy. The Paleocene Chistoozerskaya and Lubava formations in total
probably correspond to the Danian–Selandian on the basis of foraminiferal zonation, but their relationship
is not entirely clear. The Zaostrovskaya Formation probably corresponds to the upper Thanetian, but its fossil
record is very poor. The Sambian Formation corresponds to the Ypresian according to foraminifera, but its
precise stratigraphical interval remains insufficiently substantiated. The Alka Formation is presumably late
Lutetian–early Bartonian. The age of the Prussian Formation is emended based on dinocysts as early–late
Priabonian, while the Palvé Formation is now dated as the latest Priabonian. The Kurshskaya Formation corresponds
to the uppermost Eocene–Oligocene–?lower Miocene. The problem of the recognition and duration
of hiatuses between formations remains relevant.
... According to the latest research based on pollen and dinoflagellate data, as well as on lithostratigraphic studies, the Blue Earth layer is suggested to be Late Eocene (only Priabonian) in age (37.8-33.9 Mya) (Kasiński et al. 2020). However, much of the Baltic amber has been secondarily redeposited in Pleistocene glaciation across the North European Plain. ...
So far, there has been no information of the pre-imaginal stages in the well-preserved fossil record of the Mecoptera. The first and well-preserved mecopteran larva was discovered in Eocene Baltic amber. The application of synchrotron X-ray microtomography enabled the reconstruction of the body structure with high accuracy, providing a comprehensive set of morphological data that classical stereoscopic microscopy could not capture. The larva is eruciform, with distinct segmentation of the body. All the most important morphological structures are documented, including the chaetotaxy system. Shape of antenna and annulated processes on the abdominal segments point to the third/four stage of development. There is no doubt that the larva belongs to Panorpidae, the most abundant family of extant Mecoptera. The morphological characters point to the closest affinity to larvae of Cerapanorpa and Panorpa but the fossil larva cannot be assigned to any extant genus of Panorpidae. Based on the results of synchrotron X-ray microtomography, it is possible to discuss the assignement of this larva to a lower systematic level than the family, and draw conclusions about the nature of the habitat preferences of Eocene panorpid.
... Measurements of the holotype were made using an ocular micrometer on a stereomicroscope. (Sadowski et al. 2017(Sadowski et al. , 2020Seyfullah et al. 2018;Bukejs et al. 2019;Kasiński et al. 2020). ...
Based on a well-preserved specimen in Eocene Baltic amber, a new species Globicornis samlandensis sp. nov. (Coleoptera: Dermestidae) is described and illustrated. The new fossil species differs from extinct congeners in having antennomere 10 short and subtriangular with a rounded apex, and about as long as wide; while the pronotum and elytra are unicolorous dark brown, and covered with unicolorous dark setae (without patches). An updated key to fossil Globicornis species known from Baltic amber is also provided.
... Type stratum. Baltic amber; Middle-Upper Eocene (Sadowski et al. 2017(Sadowski et al. , 2020Seyfullah et al. 2018;Bukejs et al. 2019;Kasiński et al. 2020). ...
... Type stratum. Baltic amber; Middle-Upper Eocene(Sadowski et al. 2017(Sadowski et al. , 2020Seyfullah et al. 2018;Bukejs et al. 2019;Kasiński et al. 2020). ...
Based on inclusions in Eocene Baltic amber, two new fossil species of the family Cantharidae, namely Podosilis groehni sp. nov. (the second fossil species of the genus) and Silis (Silis) carsteni sp. nov., are described and illustrated. These new species are compared with the other known taxa of both genera from various amber deposits.
... Baltic amber, Priabonian age (38-34 Ma). Although the age of Baltic amber was and is still being discussed (Clauer et al. 2005;Kasiński and Kramarska 2008;Kosmowska-Ceranowicz et al. 2017;Podenas and Poinar 2001;Ritzkowski 1997;Sadowski et al. 2017;Standke 1998Standke , 2008Kasiński et al. 2020), the above-mentioned age seems to be the most probable (Grimaldi and Ross 2017). ...
... The age of Baltic amber has been a subject of extensive debate, leading to the implementation of various methods that have yielded different results. For instance, glauconite dating has suggested a middle Eocene (Lutetian) origin for the amber, whereas microfossil dating has indicated a late Eocene (Priabon) timeframe [29]. ...
Until now, the genus Robsonomyia was represented by two extant species: R. reducta Matile & Vockeroth, 1980 from North America and R. sciaraeformis (Okada, 1939) from Asia. This paper presents the first fossil members of the genus Robsonomyia , which is also the first record from Europe. Two new fossil species from Baltic amber are described: R. baltica Pełczyńska, Krzemiński & Blagoderov, sp. nov. and R. henningseni Pełczyńska, Krzemiński & Blagoderov, sp. nov.. The presence of fossil Robsonomyia spp. on the European continent suggests Holarctic distribution of the genus in the past. We also discuss possible pathways of its intercontinental dispersion.
... Type stratum. Baltic amber; Middle-Late Eocene (Sadowski et al. 2017(Sadowski et al. , 2020Seyfullah et al. 2018;Bukejs et al. 2019;Kasiński et al. 2020). ...
Based on well-preserved specimen in Eocene Baltic amber, Atomaria (Anchicera) propinqua sp. nov. is described and illustrated. It is the sixth fossil species of Atomaria Stephens, 1829 reported from fossil resins. In addition, a new fossil record of A. (Anchicera) alekseevi Lyubarsky et Bukejs, 2022 from Baltic amber is presented.
