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    Wyświetlanie 1-4 z 4
    Tytuł:
    Monotreme nature of the Australian Early Cretaceous mammal Teinolophos
    Autorzy:
    Rich, T H
    Vickers-Rich, P.
    Trusler, P.
    Flannery, T.F.
    Cifelli, R.
    Constantine, A.
    Kool, L.
    Van Klaveren, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/22297.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Early Cretaceous
    holotype
    Australia
    mammal
    Teinolophos trusleri
    Cretaceous
    Teinolophos
    Steropodontidae
    paleontology
    Opis:
    The morphology of the single preserved molar of the holotype of the Australian Early Cretaceous (Aptian) mammal Teinolophos trusleri shows that it is a monotreme and probably a steropodontid, rather than a 'eupantothere' as originally proposed. The structure of the rear of the jaw of T. trusleri supports the molecular evidence that previously formed the sole basis for recognising the Steropodontidae as a distinct family.
    Źródło:
    Acta Palaeontologica Polonica; 2001, 46, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Velociraptorine dromaeosaurid teeth from the Kimmeridgian [Late Jurassic] of Germany
    Autorzy:
    van der Lubbe, T
    Richter, U.
    Knotschke, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/21506.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    velociraptorine dromaeosaurid
    tooth
    Kimmeridgian
    Late Jurassic
    Jurassic
    Germany
    Saurischia
    Theropoda
    Dromaeosauridae
    dromaeosaurid
    paleontology
    Opis:
    Six theropod teeth from a Late Jurassic (Kimmeridgian) bone bed in Langenberg Quarry of Oker (Goslar, Germany) are identified as a new dromaeosaurid taxon, here left in open nomenclature. Direct comparison reveals that the teeth are very similar to velociraptorine dromaeosaurid teeth from the Guimarota coal mine (Late Jurassic, Portugal) and to velociraptorine dromaeosaurid teeth from Uña (Barremian, Cuenca Province, Spain). Our data indicate that the teeth from the Kimmeridgian of Lower Saxony are of velociraptorine dromaeosaurid type, and therefore represent one of the oldest occurrences of the group Dromaeosauridae.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 3; 401-408
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Australian multituberculate and its palaeobiogeographic implications
    Autorzy:
    Rich, T H
    Vickers-Rich, P.
    Flannery, T.F.
    Kear, B.P.
    Cantrill, D.J.
    Komarower, P.
    Kool, L.
    Pickering, D.
    Trusler, P.
    Morton, S.
    Van Klaveren, N.
    Fitzgerald, E.M.G.
    Powiązania:
    https://bibliotekanauki.pl/articles/22948.pdf
    Data publikacji:
    2009
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Corriebaatar marywaltersae
    Cretaceous
    new species
    multituberculate
    Gondwana
    fossil
    paleontology
    new genus
    Australia
    Multituberculata
    Cimolodonta
    Mammalia
    Opis:
    A dentary fragment containing a tiny left plagiaulacoid fourth lower premolar from the Early Cretaceous (Aptian) of Victoria provides the first evidence of the Multituberculata from Australia. This unique specimen represents a new genus and species, Corriebaatar marywaltersae, and is placed in a new family, Corriebaataridae. The Australian fossil, together with meagre records of multituberculates from South America, Africa, and Madagascar, reinforces the view that Multituberculata had a cosmopolitan distribution during the Mesozoic, with dispersal into eastern Gondwana probably occurring prior to enforcement of climatic barriers (indicated by marked differentiation in regional floras) in the Early Cretaceous.
    Źródło:
    Acta Palaeontologica Polonica; 2009, 54, 1; 1-6
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sequence of post-moult exoskeleton hardening preserved in a trilobite mass moult assemblage from the Lower Ordovician Fezouata Konservat-Lagerstätte, Morocco
    Autorzy:
    Drage, H.B.
    Vandenbroucke, T.R.A.
    Van Roy, P.
    Daley, A.C.
    Powiązania:
    https://bibliotekanauki.pl/articles/20934.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Euarthropods have a tough exoskeleton that provides crucial protection from predation and parasitism. However, this is restrictive to growth and must be periodically moulted. The moulting sequence is well-known from extant arthropods, consisting of: (i) the long inter-moult stage, in which no changes occur to the hardened exoskeleton; (ii) the pre-moult stage where the old exoskeleton is detached and the new one secreted; (iii) exuviation, when the old exoskeleton is moulted; and (iv) the post-moult stage during which the new exoskeleton starts as soft, thin, and partially compressed and gradually hardens to the robust exoskeleton of the inter-moult stage. Trilobite fossils typically consist of inter-moult carcasses or moulted exuviae, but specimens preserving the post-moult stage are rare. Here we describe nine specimens assigned to Symphysurus ebbestadi representing the first group of contemporaneous fossils collected that preserve all key stages of the moulting process in one taxon, including the post-moult stage. They were collected from a single lens in the Tremadocian part of the Fezouata Shale Formation, Morocco. Based on cephalic displacement and comparison to other trilobite moults, one specimen appears to represent a moulted exoskeleton. Four specimens are typical inter-moult carcasses. Four others are wrinkled and flattened, with thin exoskeletons compared to inter-moult specimens, and are considered post-moult individuals. These S. ebbestadi specimens illuminate the preservation and morphology of the post-moulting stage, characterised by strong anterior-posterior exoskeleton wrinkling, as well as overall body flattening and reduced visibility of thoracic articulations. Being found in the same lens, these specimens likely represent the first preserved in-the-act mass moulting event. The displayed sequence of moulting suggests the moulting process in trilobites was comparable to modern arthropods, and conserved within euarthropod evolutionary history.
    Źródło:
    Acta Palaeontologica Polonica; 2019, 64, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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