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    Wyświetlanie 1-6 z 6
    Tytuł:
    Taxonomy and taphonomy of Cenomanian (Upper Cretaceous) nautilids from Annopol, Poland
    Autorzy:
    Machalski, M.
    Wilmsen, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/139221.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    nautilids
    condensed deposits
    taphonomy
    cenomanian
    Cretaceous
    Annopol
    Polska
    tafonomia
    cenoman
    kreda
    Polska
    Opis:
    A nautilid faunule of seven specimens, comprising Eutrephoceras bouchardianum (d’Orbigny, 1840), Cymatoceras deslongchampsianum (d’Orbigny, 1840), and Cymatoceras tourtiae (Schlüter, 1876) is described from a condensed middle Cenomanian interval at Annopol, Poland. C. tourtiae is recorded for the first time in Poland. The studied material consists of reworked phosphatised internal moulds of phragmocones, which may be of early or middle Cenomanian age, given the stratigraphic range of the associated ammonites. The nautilid moulds vary in inferred mode of infilling, and in intensity of abrasion, bioerosion and mineralisation. The sediment entered the phragmocones in two ways: 1) through punctures in the shell, the result of bioerosion or mechanical damage; 2) through siphonal openings by intracameral currents. In contrast to the fossil moulds from the Albian phosphorites of Annopol, which originated via direct precipitation of apatite around and/or inside fossils, the present nautilid moulds seem to have originated through secondary phosphatisation of the initially calcareous moulds. Diversity of taphonomic signatures in nautilid material from the middle Cenomanian interval at Annopol is compatible with the complex, multievent depositional scenario proposed for this level.
    Źródło:
    Acta Geologica Polonica; 2015, 65, 4; 495-506
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oyster-bioimmured ammonites from the Upper Albian of Annopol, Poland: stratigraphic and palaeobiogeographic implications
    Autorzy:
    Machalski, M.
    Kennedy, W. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/138774.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bioimmuration
    oysters
    ammonites
    Albian
    Cretaceous
    Annopol
    Polska
    stratigraphy
    palaeobiogeography
    ostrygi
    amonity
    alb
    kreda
    Polska
    stratygrafia
    Opis:
    Ammonites Mortoniceras (Subschloenbachia) sp. are preserved as attachment scars on the oyster shells from the topmost portion of the Albian succession at Annopol, Poland. These oyster-bioimmured ammonites show a closest affinity to the representatives of Mortoniceras (Subschloenbachia) characteristic of the upper Upper Albian Mortoniceras perinflatum Zone. No ammonites indicative of the uppermost Albian–lowermost Cenomanian Praeschloenbachia briacensis Zone are recorded. Thus, the hiatus at the Albian–Cenomanian boundary at Annopol embraces the latter zone. The presence (and dominance) of Mortoniceras in the upper Upper Albian ammonite assemblage of Annopol suggests that the representatives of this Tethyan genus could migrate into the epicratonic areas of Poland directly from the Tethyan Realm, via the Lwów (Lviv) region.
    Źródło:
    Acta Geologica Polonica; 2013, 63, 4; 545-554
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First pterosaur remains from the Cretaceous of Poland
    Autorzy:
    Machalski, M.
    Martill, D. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/191793.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Pterosauria
    Albian
    Cretaceous
    Polska
    Opis:
    The first records of pterosaurs from the Cretaceous of Poland are reported, on the basis of fragmentary remains from the marine Upper Albian (Lower Cretaceous) of the Annopol Anticline, central Poland. The new material consists of four bone fragments, tentatively interpreted as: 1) a portion of wing phalanx; 2) a medial element of fused skull bones (parietal crest?); 3) a fragmentary carpal or tarsal; and 4) a distal phalanx of the pes (or a very small fragment of a long cervical vertebra). Previously, only the remains of marine vertebrates have been reported from the Cretaceous of the Annopol area. The pterosaur fossils studied most probably belonged to individuals that died while over the sea. The possibility that they represent remains dropped from floating carcasses, introduced into the marine environment by rivers, is regarded as less probable, as there are no remains of dinosaurs or other terrestrial fauna in the Annopol deposits.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2013, 83, 2; 99--104
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A late Albian ammonite assemblage from the mid-Cretaceous succession at Annopol, Poland
    Autorzy:
    Kennedy, W. J.
    Machalski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/139056.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    ammonites
    albian
    Cretaceous
    Annopol
    Polska
    condensation
    stratigraphy
    amonity
    alb
    kreda
    Polska
    kondensacja
    stratygrafia
    Opis:
    A previously unrecorded ammonite assemblage, comprising Lepthoplites sp., Callihoplites tetragonus (Seeley, 1865), C. cf. tetragonus, Arrhaphoceras cf. substuderi Spath, 1923, Cantabrigites sp., Stoliczkaiella (Stoliczkaiella) sp., Hamites cf. duplicatus Pictet and Campiche, 1861, H. cf. subvirgulatus Spath, 1941, and H. cf. venetzianus Pictet, 1847, is described from the mid-Cretaceous condensed succession at Annopol, Poland. These specimens are preserved as pale phosphates or sandstone moulds in a bed of reworked phosphatic nodules near the top of the Albian. This assemblage has many species in common with the late late Albian faunas from condensed deposits of England, Switzerland, and France. The presence of Callihoplites tetragonus indicates the lowermost upper upper Albian Mortoniceras fallax Zone. The ammonites studied are the youngest elements in the phosphate bed, which also contains taxa as old as the middle Albian Hoplites dentatus Zone. This bed originated through condensation and reworking of nodules and fossils in a period of low net sedimentation rate, being probably a reflection of a sea-level drop at the boundary between the classic ammonite zones of Mortoniceras inflatum and Stoliczkaiella dispar.
    Źródło:
    Acta Geologica Polonica; 2015, 65, 4; 545-553
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Terminal Maastrichtian ammonites from Turkmenistan, Central Asia
    Autorzy:
    Machalski, M.
    Jagt, J.W.M.
    Alekseev, A.S.
    Jagt-Yazykova, E.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/20971.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Maastrichtian
    ammonite
    Turkmenistan
    Central Asia
    Ammonoidea
    extinction
    paleobiogeography
    Cretaceous
    Paleogene
    Opis:
    A complete uppermost Maastrichtian–Danian succession in the Sumbar River section, western Kopet Dagh (southwest Turkmenistan, Central Asia), constitutes one of the few instances in the world where the fossil record of the last ammonites can be directly positioned with respect to the iridium−rich, impact−related clay layer, which defines the Cretaceous–Paleogene (K–Pg) boundary. Two ammonite taxa, Baculites cf. vertebralis and Hoploscaphites constrictus johnjagti, range up to a level directly beneath the K–Pg boundary clay in the Sumbar River section. Thus, these two forms probably survived until the very end of the Maastrichtian in the western Kopet Dagh area. The terminal Maastrichtian ammonite records from the Sumbar River area represent the southeasternmost occurrences of these essentially Boreal taxa.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Campanian and Maastrichtian mosasaurid reptiles from central Poland
    Autorzy:
    Machalski, M
    Jagt, J.W.M.
    Dortangs, R.W.
    Mulder, E.W.A.
    Radwanski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/21053.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Reptilia
    Polska
    Cretaceous
    food chain
    Platynota
    marine lizard
    Squamata
    mosasaurid reptile
    reptile
    fossil
    Upper Cretaceous
    Mosasauridae
    lizard
    paleontology
    Opis:
    Isolated marginal teeth and tooth crowns of Late Campanian and Late Maastrichtian mosasaurid reptiles (Squamata, Platynota) from the Wisła River valley area, central Poland, are described and illustrated. These comprise two Late Campanian taxa from Piotrawin quarry: Prognathodon sp. and Plioplatecarpinae sp. A., and four late Late Maastrichtian taxa from Nasiłów quarry: Mosasaurus cf. hoffmanni Mantell, 1829, M. cf. lemonnieri Dollo, 1889c, “Mosasaurus (Leiodon) cfr. anceps” sensu Arambourg (1952), and Plioplatecarpinae sp. B. In addition, the previously described fragmentary jaw with associated teeth of the Late Campanian age from Maruszów quarry (west of the Wisła River area), is reassigned to Mosasaurus cf. hoffmanni. This specimen suggests that M. hoffmanni or a closely related (ancestral?) species already appeared in Europe during the Late Campanian (well−documented European occurrences of M. hoffmanni are Late Maastrichtian in age). At least part of the described mosasaur material is likely to stem from periodic feeding in the area (broken−off or shed tooth crowns) or from floating carcasses (complete teeth and jaw fragments).
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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