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    Wyświetlanie 1-3 z 3
    Tytuł:
    Ontogeny and variability in ribbing of Late Valanginian lamellaptychi (Ammonitina)
    Autorzy:
    Vašíček, Z.
    Klein, J.
    Janssen, N. M .M.
    Powiązania:
    https://bibliotekanauki.pl/articles/191449.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Lamellaptychi
    Mortilletilamellaptychus
    ontogeny
    Late Valanginian
    south-eastern France
    Opis:
    Late Valanginian (Early Cretaceous) lamellaptychi of the genus Mortilletilamellaptychus were collected from seven ammonite-controlled sections in south-eastern France demonstrate distinct changes in ribbing during growth. Simpler juvenile ribbing, which is essentially uniform for all of the specimens studied, differs distinctly from the complicated arrangement of the adult ribs. Changes in ribbing morphology were observed in the five species studied, two of which were identified as new (i.e. Mortilletilamellaptychus heterocostatus sp. nov. and M. bicostatus sp. nov.).
    Źródło:
    Annales Societatis Geologorum Poloniae; 2016, 86, 1; 17-28
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Aptychi from the Berriasian/Valanginian (France and Spain) : new stratigraphical and morphological details
    Autorzy:
    Vašíček, Z.
    Janssen, N. M .M.
    Klein, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/191274.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    lamellaptychi
    Berriasian
    Valanginian
    Vocontian Basin
    Betic Cordillera
    Opis:
    Late Berriasian–earliest Valanginian lamellaptychi (Cephalopoda) are described in detail for the first time. With one exception, all species belong to early representatives of Mortilletilamellaptychus. The majority of the well dated aptychi come from the cephalopod-rich sediments of the Vocontian Basin in south-eastern France; others are from south-eastern Spain. Thorolamellaptychus anglesensis sp. nov. is introduced.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2016, 86, 3; 265-272
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    First Upper Cretaceous dinosaur track assemblage from Jordan (Middle East) : preliminary results
    Autorzy:
    Klein, Hendrik
    Gierliński, Gerard
    Lallensack, Jerns N.
    Abu Hamad, Abdalla
    Al-Mashakbeh, Habes
    Alhejoj, Ikhlas
    Konopka, Marcin
    Błoński, Marcin
    Powiązania:
    https://bibliotekanauki.pl/articles/1836264.pdf
    Data publikacji:
    2020
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Ajlun Group
    Na’ur Formation
    Cenomanian
    footprints
    theropod
    sauropod
    ornithopod
    Opis:
    Dinosaur tracks from Jordan (Middle East) have only been briefly reported in geological overview papers and books. We present here the first description and documentation of Jordanian dinosaur tracks based on a new tracksite from the south-central part of the country. The track-bearing strata belong to marginal marine (tidal flat) deposits of the Na’ur Formation (Upper Cretaceous, Cenomanian). This unit largely consists of well-bedded limestones, dolomites and marls that contain abundant marine invertebrate fossils such as bivalves, ammonites and foraminifers. The dinosaur ichnofauna occurs on four different levels and comprises abundant theropod tracks and trackways as well as isolated sauropod and ornithopod tracks. Theropod trackways consist of two different morphotypes. Morphotype 1 is tridactyl (26 cm pes length) and with a broad, but short metatarsal area and resembles the ichnogenus Picunichnus from the Lower Cretaceous (Albian) of Argentina. Morphotype 2 (36 cm pes length) has extensive and narrow metatarsal impressions continuously occurring along regularly-spaced trackways. This suggests either a plantigrade movement of the trackmaker or reflects preservational factors. By their over-all-shape with thin digits, Morphotype 2 resembles described penetrative tracks suggesting a strong influence of the substrate. Sauropod tracks are relatively small (40 cm pes length) and show low heteropody with a kid-ney-shaped manus imprint, pointing to a Sauropodichnus-like form. The single ornithopod pes track (18 cm in length) is similar to material described as Ornithopodichnus from the Lower Cretaceous of Korea. Due to the incomplete material of sauropod and ornithopod prints, no concrete assignment is given to this material and further study is needed. The presence of dinosaur tracks proves a temporary subaerial exposure of the surface whereas the main part of the Na’ur Formation is dominated by subaqueous activity of marine faunas.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2020, 90, 3; 331-342
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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