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Wyszukujesz frazę "Jagt, J.W.M." wg kryterium: Autor

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    Wyświetlanie 1-5 z 5
    Tytuł:
    Thirty odd years after Alvarez’s discovery: Faunal evolution and principal bio-events of the Cretaceous Period - recent progress and future directions
    Autorzy:
    Jagt-Yazykova, E.A.
    Jagt, J.W.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/21601.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Alvarez’s discovery
    fauna evolution
    Cretaceous
    progress
    future direction
    paleontology
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Cretaceous gastropod egg capsules from the Netherlands preserved by bioimmuration
    Autorzy:
    Zaton, M.
    Taylor, P.D.
    Jagt, J.W.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/21441.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Late Cretaceous
    gastropod
    egg capsule
    Netherlands,The
    bioimmuration
    Cretaceous
    paleontology
    Opis:
    Clusters of gastropod egg capsules, inferred to be of neritoids and attached to the inner shell wall of the ultimate whorl of a large volutid gastropod, are here recorded from the upper Nekum Member (Maastricht Formation; late Maastrichtian) of the ENCI−Heidelberg Cement Group quarry, St Pietersberg (Maastricht, southeast Netherlands). Because the aragonitic shell of the volutid has dissolved, the outlines of the egg capsules are now revealed on the steinkern of indurated biocalcarenite, having been subsequently overgrown by cheilostome bryozoan colonies and preserved as mould bioimmurations. This represents the first example of gastropod eggs preserved through bioimmuration, as well as the first record of gastropod eggs from the Cretaceous.
    Źródło:
    Acta Palaeontologica Polonica; 2013, 58, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica 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
    Tytuł:
    New Late Jurassic symmetrical hermit crabs from the southern Polish Uplands and early paguroid diversification
    Autorzy:
    Fraaije, R.H.B.
    Krzeminski, W.
    Van Bakel, B.W.M.
    Krzeminska, E.
    Jagt, J.W.M.
    Powiązania:
    https://bibliotekanauki.pl/articles/945882.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Anomura
    Paguroidea
    Parapylochelidae
    carapace
    morphology
    evolution
    Jurassic
    Late Jurassic
    hermit crab
    crab
    Polska
    paguroid carapace
    Opis:
    On the basis of carapaces, three new genera and species of symmetrical paguroid anomurans are described. Diogenicheles theodorae, Masticacheles longirostris, and Pilgrimcheles karolinae constitute the oldest known members of the family Parapylochelidae. As noted previously, assemblages from sponge−reefal strata of Oxfordian (Late Jurassic) age in the southern Polish Uplands document an important radiation event amongst paguroids. Compared to the present day, the Parapylochelidae were more diverse during the mid−Mesozoic; they appear to have withdrawn from shallow, reefal waters to deep−water settings from the Late Jurassic onwards. Paguroid faunas from the Oxfordian of Europe already are highly diverse, both morphologically and phylogenetically, and comprise early members of the families Diogenidae, Pylochelidae, and Parapylochelidae. This suggests that the evolutionary history of paguroids started much earlier (i.e., in pre−Jurassic times) than previously assumed. New terms for several typical paguroid carapace regions are introduced and on the basis of carapace morphology and ecological shifts hypotheses on the early speciation of hermit crabs are put forward.
    Źródło:
    Acta Palaeontologica Polonica; 2014, 59, 3; 681-688
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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