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    Tytuł:
    Les microfossiles du Jurassique superieur de Magnuszew (Pologne)
    Mikroorganizmy z górnej jury Magnuszewa
    Mikroorganizmy iz verkhnejj jury Magnusheva (Polsha)
    Autorzy:
    Gorka, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/20603.pdf
    Data publikacji:
    1965
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    microorganism
    microfossil
    Jurassic
    Źródło:
    Acta Palaeontologica Polonica; 1965, 10, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Unique finds in palynological spectra: acetolyze resistant vegetative forms of freshwater dinoflagellate based on the Lake Młynek record from northeastern Poland
    Autorzy:
    Bińka, Krzysztof
    Welc, Fabian
    Nitychoruk, Jerzy
    Sieradz, Dominika
    Lewczuk, Antoni
    Powiązania:
    https://bibliotekanauki.pl/articles/2025037.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    freshwater dinoflagellate
    microfossil
    human impact
    Holocene
    Opis:
    The freshwater dinoflagellate represent microfossils which are very rarely noted in lake deposits. In Late Holocene sediments of the Lake Młynek, the Iława Lakeland, northern Poland, we identified intense blooms of algae of the genus Palatinus. They occurred primarily in the period of strong human impact during expansion of the Monastic State of the Teutonic Order. The most amazing thing is that samples in which conventional palynological maceration has been used dinoflagellate are represented by armored vegetative forms instead of cysts. During this laboratory processes, especially acetolysis, cellulosic thecae of armored forms should be destructed. This is the second known example of acetolysis resistant thecae of modern dinoflagellate, built by substance other than cellulose. Palatinus blooms were associated probably with the hydrotechnical works made by Teutonic Knights in the catchment, which caused supply and discharge of micronutrients e.g. selenium in the basin.
    Źródło:
    Studia Quaternaria; 2020, 37; 59-67
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Skeletonized microfossils from the Lower-Middle Cambrian transition of the Cantabrian Mountains, Northern Spain
    Autorzy:
    Clausen, S
    Alvaro, J.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/21794.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    hyolith
    cambroclavid
    benthic replacement
    microfossil
    skeletonized microfossil
    Spain
    hyoliththelminth
    sponge
    chancelloriid
    Cambrian
    paleontology
    Cantabrian Mountains
    Lower-Middle Cambrian
    Opis:
    Two different assemblages of skeletonized microfossils are recorded in bioclastic shoals that cross the Lower–Middle Cambrian boundary in the Esla nappe, Cantabrian Mountains. The uppermost Lower Cambrian sedimentary rocks represent a ramp with ooid−bioclastic shoals that allowed development of protected archaeocyathan−microbial reefs. The shoals yield abundant debris of tube−shelled microfossils, such as hyoliths and hyolithelminths (Torellella), and trilobites. The overlying erosive unconformity marks the disappearance of archaeocyaths and the Iberian Lower–Middle Cambrian boundary. A different assemblage occurs in the overlying glauconitic limestone associated with development of widespread low−relief bioclastic shoals. Their lowermost part is rich in hyoliths, hexactinellid, and heteractinid sponge spicules (Eiffelia), chancelloriid sclerites (at least six form species of Allonnia, Archiasterella, and Chancelloria), cambroclaves (Parazhijinites), probable eoconchariids (Cantabria labyrinthica gen. et sp. nov.), sclerites of uncertain affinity (Holoplicatella margarita gen. et sp. nov.), echinoderm ossicles and trilobites. Although both bioclastic shoal complexes represent similar high−energy conditions, the unconformity at the Lower–Middle Cambrian boundary marks a drastic replacement of microfossil assemblages. This change may represent a real community replacement from hyolithelminth−phosphatic tubular shells to CES (chancelloriid−echinoderm−sponge) meadows. This replacement coincides with the immigration event based on trilobites previously reported across the boundary, although the partial information available from originally carbonate skeletons is also affected by taphonomic bias.
    Źródło:
    Acta Palaeontologica Polonica; 2006, 51, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Age and evolution of depositional environments of the supra-evaporitic deposits in the northern, marginal part of the Carpathian Foredeep: micropalaeontological evidence
    Autorzy:
    Szczechura, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059376.pdf
    Data publikacji:
    2000
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Carpathian Foredeep
    Middle Miocene
    microfossil
    biostratigraphy
    palaeoecology
    palaeogeography
    Opis:
    A rich assemblage of microfossils, including foraminifera, ostracodes and bolboforms (calcareous phytoplankton) have been found in the supra-evaporitic deposits of the Pecten Beds (Upper Badenian) and Krakowiec Clays (Sarmatian) of Middle-Miocene age, which occur in the Jamnica S-119 borehole near Tarnobrzeg, in the central part of the Carpathian Foredeep. Environmental conditions have been deduced from these microfossils. Comparison with other parts of the Carpathian Foredeep shows that microfauna distribution depended on location within the sedimentary basin and on hydrological conditions. Poorly-diversified and specific microfossils were associated with evaporites and overlying sediments (particularly within the lower Pecten Beds and Krakowiec Clays), indicating poorly-oxygenated near-bottom waters. Possibly, "Upper-Badenian" and "Sarmatian" biofacies had already differentiated by the end of the Badenian. Distribution of the Upper Badenian microfauna and bolboforms in the Polish part of the Carpathian Foredeep and beyond shows that there was faunal exchange between the eastern and western parts of the Polish section of the Carpathian Foredeep, and indicates connection between the Central Paratethys and Mediterranean basin areas.
    Źródło:
    Geological Quarterly; 2000, 44, 1; 81-100
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Palaeoenvironments of the Middle Miocene evaporite-bearing deposits from the Działoszyce Trough, Carpathian Foredeep, Poland, based on microfaunal studies
    Autorzy:
    Szczechura, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059430.pdf
    Data publikacji:
    2000
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Carpathian Foredeep
    Middle Miocene
    evaporites
    microfossil
    biostratigraphy
    palaeogeography
    palaeoecology
    Opis:
    Analysis of microfossil distribution (foraminifera, ostracodes and bolboforms) in evaporite-bearing deposits from the Działoszyce Trough (northern Carpathian Foredeep) has allowed the distinction of three ecozones: the Globigerinoides ecozone (Lower Badenian), the Globigerina ecozone (Middle and Upper Badenian) including an evaporitic horizon, and the Anomalinoides dividens ecozone (Sarmatian). These ecozones are of ecostratigraphical significance and reflect major sea-level changes. The highest stands of sea-level correspond with the Globigerinoides ecozone and the upper part of the Globigerina ecozone, above the evaporites, and they are considered to relate to an influx of oceanic waters. Drastic climatic changes (cooling) and a sea-level fall that weakened bottom water circulation at the boundary between the Globigerinoides and Globigerina ecozones are considered the major factors which accounted for hypoxia (an oxygen-poor environment) that accompanied evaporitic deposition. The appearance of a specific ostracod assemblage (Xylocythere carpathica Szczechura and ?Microxestoleberis sp.) in Upper Badenian deposits is linked with the occurrence of active submarine hydrocarbon seepages.
    Źródło:
    Geological Quarterly; 2000, 44, 2; 119-135
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Gonzalo Vidal [ 1943-1997 ]
    Autorzy:
    Bengtson, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/21727.pdf
    Data publikacji:
    1997
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    biography
    organic microfossil
    geological evolution
    biological evolution
    paleontology
    Vidal Gonzalo biography
    Źródło:
    Acta Palaeontologica Polonica; 1997, 42, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chondrichthyan genus Lissodus from the Lower Carboniferous of Ireland
    Autorzy:
    Duncan, M
    Powiązania:
    https://bibliotekanauki.pl/articles/21758.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Carboniferous
    fish
    Lissodus
    Hybodontoidae
    jaw reconstruction
    Ivorian
    microfossil
    Ireland
    paleontology
    Chondrichthyes
    Opis:
    A new record of the chondrichthyan hybodontoid genus Lissodus is presented from two localities within the Mississippian (Tournaisian) rocks of Ireland. Five morphotypes of the genus are described within each of which occurs morphological variance. Specimens recovered and described herein are from crinoidal limestones whose palaeoenvironments are interpreted as ranging from a moderately shallow high−energy carbonate shelf, to relatively deep off−shore. The richest fauna recovered from the high−energy carbonate shelf, contains all five morphotypes raising the possibility that they may have been derived from a single species of shark. A discussion on the relationship between the five morphotypes and other Carboniferous Lissodus teeth is offered and it is argued that although the morphotypes differ slightly from other Carboniferous Lissodus teeth, they may belong to a closely related species not formally named until additional evidence is obtained. A mouth reconstruction using the teeth recovered from the Lower Carboniferous of Ireland is proposed.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Autothecal morphs and dormancy in the camaroid graptolite Xenotheka
    Autorzy:
    Mierzejewski, P
    Powiązania:
    https://bibliotekanauki.pl/articles/23262.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Xenotheka klinostoma
    Graptolithina
    Camaroidea
    Sweden
    Ordovician
    microfossil
    ultrastructure
    paleontology
    dormancy
    camaroid graptolite
    Opis:
    The camaroid graptolite Xenotheka klinostoma Eisenack, 1937 is described from the lower Llanvirn limestones of Gilbergabrottet, northern Öland, Sweden. Two distinct autothecal morphs are recognized: (1) normal morph (described for the first time), i.e. an autotheca with an unsculptured outer surface, devoid of both an outer lining and autothecal occlusion, and inhabited by an active zooid; and (2) sealed morph, i.e. an autotheca coated and occluded, provided with a sculptured outer lining made of a unique verrucose fabric, and inhabited by an inactive or dormant zooid. In addition, the existence of a hypothetical (3) unsealed morph or re−opened autotheca, devoid of an autothecal occlusion but provided with an outer lining, and inhabited by a reactivated zooid, is predicted. The sealed morphs may represent an adaptation which allowed their inhabitants to survive adverse conditions. The outer lining of Xenotheka is compared with a peculiar outer membrane found in the modern hemichordate Rhabdopleura, from the intertidal zone of Fiji, and with camaroid extracamaral tissue.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Early Carboniferous chondrichthyan Thrinacodus from Ireland, and a reconstruction of jaw apparatus
    Autorzy:
    Duncan, M
    Powiązania:
    https://bibliotekanauki.pl/articles/23089.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    stratigraphy
    Carboniferous
    fish
    locality
    jaw reconstruction
    Thrinacodus
    microfossil
    tooth
    jaw apparatus
    paleontology
    paleoenvironment
    Chondrichthyes
    Opis:
    Specimens of the microscopic teeth of the chondrichthyan genus Thrinacodus are described from Mississippian (Tournaisian) rocks of Ireland. They are from calcareous mudstones or crinoidal limestones whose palaeoenvironments are interpreted as ranging from near shore, shallow water through moderately shallow high energy carbonate shelf, to relatively deep off−shore. The richest fauna was recovered from the high−energy carbonate shelf, containing both asymmetrical and symmetrical teeth raising the possibility that they may have been derived from a single species of shark. The teeth are assigned to Thrinacodus incurvus (Newberry and Worthen, 1866), which is suggested to be a senior synonym of Thrinacodus ferox Turner, 1982. Presently the genus is known only from isolated teeth. The asymmetrical and symmetrical teeth are described as two morphotypes, ferox morphotype and nanus morphotype. Within the morphotypes, morphological variation occurs, especially within the ferox morphotype, allowing a number of possible reconstructions of the dentition of Thrinacodus incurvus to be presented as a basis for future debate.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Burgess Shale-type microfossils from the middle Cambrian Kaili Formation, Guizhou Province, China
    Autorzy:
    Harvey, T.H.P.
    Ortega-Hernandez, J.
    Lin, J.-P.
    Yuanlong, Z.
    Butterfield, N.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/23425.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    microfossil
    Middle Cambrian
    Cambrian
    Kaili Formation
    Guizhou province
    China
    Priapulida
    acritarch
    palynology
    taphonomy
    Opis:
    Diverse carbonaceous microfossils, including exceptionally preserved remains of non−biomineralizing metazoans, are reported from a basal middle Cambrian interval of the Kaili Formation (Guizhou Province, China). The application of a gentle acid maceration technique complements previous palynological studies by revealing a larger size−class of acritarchs, a richer assemblage of filamentous microfossils, and a variety of previously unrecovered forms. Metazoan fossils include Wiwaxia sclerites and elements derived from biomineralizing taxa, including chancelloriids, brachiopods and hyolithids, in common with previously studied assemblages from the early and middle Cambrian of Canada. In addition, the Kaili Formation has yielded pterobranch remains and an assemblage of cuticle fragments representing “soft−bodied” worms, including a priapulid−like scalidophoran. Our results demonstrate the wide distribution and palaeobiological importance of microscopic “Burgess Shale−type” fossils, and provide insights into the limitations and potential of this largely untapped preservational mode.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241
    Autorzy:
    Kamikuri, S.-I.
    Motoyama, I.
    Nishi, H.
    Iwai, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/21655.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Neogene
    Radiolaria
    biostratigraphy
    fauna
    evolution rate
    Pacific Ocean
    Late Miocene
    Miocene
    Middle Miocene
    paleontology
    microfossil
    Opis:
    Radiolarians from Sites 845 and 1241 in the eastern equatorial Pacific were examined in order to evaluate the role of paleoceanographic perturbations upon the general faunal evolutionary pattern of tropical planktonic organisms during the last 17 Ma. Radiolarian appearance and extinction rates indicate no periods of mass extinctions during the past 17 Ma. However, a relatively rapid replacement of the species in the radiolarian assemblages occurs near the middle–late Miocene boundary. This replacement event represents the gradual extinction of a number of radiolarian species and their gradual replacement by evolving new species. The modern equatorial circulation system was formed near the middle–late Miocene boundary due to the closure of the Indonesian seaway. The minor faunal turnover appears to be associated with the formation of the modern equatorial circulation system near the middle–late Miocene boundary. Diatom assemblages in the equatorial Pacific became more provincial in character after about 9 Ma. The appearance and extinction rates of planktic foraminifers were relatively high near the middle–late Miocene boundary, and those of calcareous nannoplankton reached high values in the early late Miocene in the equatorial Pacific Ocean. Thus, faunal evolution from the middle Miocene type to late Miocene types occurred first, being followed by floral evolution. The middle–late Miocene boundary is not a sharp boundary for planktonic microfossils, but marks a time of transition critical for faunal and floral evolution in both siliceous and calcareous microfossil assemblages in the equatorial Pacific Ocean.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spore-like bodies in some Early Paleozoic acritarchs: clues to chlorococcalean affinities
    Autorzy:
    Kazmierczak, J
    Kremer, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/20169.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    spore-like body
    Early Paleozoic
    Paleozoic
    acritarch
    microfossil
    Chlorococcales
    phytoplankton
    evolution
    polygonomorph
    acanthomorph
    sphaeromorph
    herkomorph acritarch
    Opis:
    We present discoveries of internal bodies in problematic Silurian and Devonian organic−walled microfossils classified traditionally as polygonomorph, acanthomorph, sphaeromorph, and herkomorph acritarchs. These bodies are comparable with reproductive structures (autoand/or aplanospores) of modern unicellular green algae (Chlorococcales). Our findings suggest that many of these microfossils may represent asexually reproducing (sporulating) vegetative cells of chlorococcalean algae. The presence of spore−like bodies in the studied acritarchs supports earlier suggestions, based on ultrastructural and biomarker studies, that some acritarchs can be affined with green algae.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 3; 541-551
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cambrian microfossils from glacial erratics of King George Island, Antarctica
    Autorzy:
    Wrona, R
    Powiązania:
    https://bibliotekanauki.pl/articles/22565.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    skeletal fossil
    Antarctic
    Australia
    Middle Cambrian
    Early Cambrian
    microfossil
    Cape Melville Formation
    Cambrian
    paleontology
    Early Miocene
    King George Island
    Opis:
    Limestone erratics in the Early Miocene glacio−marine Cape Melville Formation of King George Island, West Antarctica, have yielded Early and Middle Cambrian small skeletal fossils (SSF) accompanied by calcified cyanobacteria, archaeocyath and spiculate sponges, trilobites and echinoderms. The SSF assemblage comprises disarticulated sclerites of chancelloriids, halkieriids, tommotiids, lapworthellids, palaeoscolecids, hyolithelminths, lingulate brachiopods, helcionelloid molluscs, hyoliths, and bradoriids. All 24 described species are common to Antarctica and Australia. Most are recorded here from Antarctica for the first time, including Shetlandia multiplicata gen. et sp. nov. and two new species Byronia? bifida and Hadimopanella staurata. The lithological and fossil contents of the boulders are almost identical with autochthonous assemblages from the Shackleton Limestone in the Argentina Range and Transantarctic Mountains. Cambrian outcrops around the Weddell Sea are a plausible source of the erratics. The fauna is closely similar to that from the uppermost Botomian Wilkawillina Limestone in the Flinders Ranges and Parara Limestone on Yorke Peninsula, and Toyonian Wirrealpa and Aroona Creek Limestones in the Flinders Ranges, as well as the Ramsay Limestone on Yorke Peninsula, all in the Arrowie and Stansbury Basins of South Australia. These very similar faunal and facies successions for Antarctica and Australia strongly support their common biotic and sedimentary evolution on the same margin of a greater Gondwana supercontinent throughout the Early Cambrian.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Silicified and phosphatized Tianzhushania, spheroidal microfossil of possible animal origin from the Neoproterozoic of South China
    Autorzy:
    Yin, C
    Bengtson, S.
    Yue, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/20023.pdf
    Data publikacji:
    2004
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    benthic form
    China
    Tianzhushania
    phosphorite
    animal origin
    Doushantuo Formation
    Megasphaera
    Tianzhushania tuberifera
    chert
    spheroidal microfossil
    Metazoa
    Tianzhushania ornata
    Megasphaera ornata
    Neoproterozoic
    rock matrix
    Opis:
    Comparative study of microfossils from two kinds of sediments: chert intercalations (studied in thin section) and phosphorite/phosphatic carbonate (in thin section and maceration), from the upper Neoproterozoic Doushantuo phosphorites in the Weng’an area, Guizhou Province, South China, shows that the phosphatized Megasphaera ornata and the chert−preserved Tianzhushania tuberifera should be regarded as representing the same taxon preserved by different mineralization processes. In phosphatized specimens the outer wall is often peeled off, exposing the ornamented middle wall. Some phosphatized specimens isolated from the rock matrix and specimens seen in thin sections of phosphorites show a partly preserved outer wall with spines, which can be compared to the thin−sectioned specimens from the chert beds. The small pits usually seen on the surface of the ornamented middle wall of phosphatized specimens correspond to the attachment spots of the spines in the outer wall. The presence of a spiny outer wall is a characteristic of Tianzhushania Yin and Li, 1978. Tianzhushania ornata (Xiao and Knoll, 2000) comb. nov. is here proposed as the valid name for the species. The proposed resting−egg nature of T. ornata, mainly based on the ornament type of the middle wall, cannot be excluded. The presence of a spiny outer wall, however, suggests that it is a pelagic rather than a benthic form.
    Źródło:
    Acta Palaeontologica Polonica; 2004, 49, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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