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    Wyświetlanie 1-5 z 5
    Tytuł:
    A new occurrence of Dakotasuchus kingi from the Late Cretaceous of Utah, USA, and the diagnostic utility of postcranial characters in Crocodyliformes
    Autorzy:
    FREDERICKSON, JOSEPH A.
    COHEN, JOSHUA E.
    HUNT, TYLER C.
    CIFELLI, RICHARD L.
    Powiązania:
    https://bibliotekanauki.pl/articles/945241.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    crocodylomorpha
    goniopholididae
    dakotasuchus
    cretaceous
    cenomanian
    utah
    mussentuchit
    Opis:
    Cenomanian mesoeucrocodylians from North America are known primarily from isolated teeth and scutes; any associated remains of this age are noteworthy and represent welcome additions to knowledge. Herein, we describe postcranial elements belonging to a single individual goniopholidid from the Mussentuchit Member of the Cedar Mountain Formation. We argue that this individual represents only the second fossil referable to Dakotasuchus kingi, based on overlapping elements, such as the coracoid, dorsal vertebrae, and scutes, which are strikingly similar to their counterparts in the holotype. The coracoid, in particular, is readily distinguished from those belonging to other closely-related crocodilian taxa; enough so to warrant detailed comparisons in the absence of diagnostic cranial material. The new D. kingi specimen is nearly 20% larger than the holotype, with body length and mass estimates comparable to modern American alligators (Alligator mississippiensis), making it one of the largest aquatic predators in the Mussentuchit ecosystem.
    Źródło:
    Acta Palaeontologica Polonica; 2017, 62, 2; 279-286
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evidence of two lineages of metriorhynchid crocodylomorphs in the Lower Cretaceous of the Czech Republic
    Autorzy:
    Madzia, D.
    Sachs, S.
    Young, M.T.
    Lukeneder, A.
    Skupien, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082332.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Crocodylomorpha
    Thalattosuchia
    Metriorhynchidae
    Lower Cretaceous
    Valanginian
    Czech Republic
    Opis:
    Metriorhynchid crocodylomorphs were an important component in shallow marine ecosystems during the Middle Jurassic to Early Cretaceous in the European archipelago. While metriorhynchids are well known from western European countries, their central and eastern European record is poor and usually limited to isolated or fragmentary specimens which often hinders a precise taxonomic assignment. However, isolated elements such as tooth crowns, have been found to provide informative taxonomic identifications. Here we describe two isolated metriorhynchid tooth crowns from the upper Valanginian (Lower Cretaceous) of the Štramberk area, Czech Republic. Our assessment of the specimens, including multivariate analysis of dental measurements and surface enamel structures, indicates that the crowns belong to two distinct geosaurin taxa (Plesiosuchina? indet. and Torvoneustes? sp.) with different feeding adaptations. The specimens represent the first evidence of Metriorhynchidae from the Czech Republic and some of the youngest metriorhynchid specimens worldwide.
    Źródło:
    Acta Palaeontologica Polonica; 2021, 66, 2; 357-367
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The giant pliosaurid that wasn’t-revising the marine reptiles from the Kimmeridgian, Upper Jurassic, of Krzyzanowice, Poland
    Autorzy:
    Madzia, D.
    Szczygielski, T.
    Wolniewicz, A.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082281.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Pliosauridae
    Metriorhynchidae
    Crocodylomorpha
    Thalassochelydia
    Kimmeridgian
    Jurassic
    Polska
    Opis:
    Marine reptiles from the Upper Jurassic of Central Europe are rare and often fragmentary, which hinders their precise taxonomic identification and their placement in a palaeobiogeographic context. Recent fieldwork in the Kimmeridgian of Krzyżanowice, Poland, a locality known from turtle remains originally discovered in the 1960s, has reportedly provided additional fossils thought to indicate the presence of a more diverse marine reptile assemblage, including giant pliosaurids, plesiosauroids, and thalattosuchians. Based on its taxonomic composition, the marine tetrapod fauna from Krzyżanowice was argued to represent part of the “Matyja-Wierzbowski Line”—a newly proposed palaeobiogeographic belt comprising faunal components transitional between those of the Boreal and Mediterranean marine provinces. Here, we provide a detailed re-description of the marine reptile material from Krzyżanowice and reassess its taxonomy. The turtle remains are proposed to represent a “plesiochelyid” thalassochelydian (Craspedochelys? sp.) and the plesiosauroid vertebral centrum likely belongs to a cryptoclidid. However, qualitative assessment and quantitative analysis of the jaws originally referred to the colossal pliosaurid Pliosaurus clearly demonstrate a metriorhynchid thalattosuchian affinity. Furthermore, these metriorhynchid jaws were likely found at a different, currently indeterminate, locality. A tooth crown previously identified as belonging to the thalattosuchian Machimosaurus is here considered to represent an indeterminate vertebrate. The revised taxonomy of the marine reptiles from Krzyżanowice, as well as the uncertain provenance of the metriorhynchid specimen reported from the locality, cast doubt on the palaeobiogeographic significance of the assemblage.
    Źródło:
    Acta Palaeontologica Polonica; 2021, 66, 1; 99-129
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research history, taphonomy, and age structure of a mass accumulation of the ornithopod dinosaur Dysalotosaurus lettowvorbecki from the Upper Jurassic of Tanzania
    Autorzy:
    Hubner, T.R.
    Foth, C.
    Heinrich, W.-D.
    Schwarz, D.
    Bussert, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082333.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Crocodylomorpha
    Thalattosuchia
    Metriorhynchidae
    Lower Cretaceous
    Valanginian
    Czech Republic
    Opis:
    Metriorhynchid crocodylomorphs were an important component in shallow marine ecosystems during the Middle Jurassic to Early Cretaceous in the European archipelago. While metriorhynchids are well known from western European countries, their central and eastern European record is poor and usually limited to isolated or fragmentary specimens which often hinders a precise taxonomic assignment. However, isolated elements such as tooth crowns, have been found to provide informative taxonomic identifications. Here we describe two isolated metriorhynchid tooth crowns from the upper Valanginian (Lower Cretaceous) of the Štramberk area, Czech Republic. Our assessment of the specimens, including multivariate analysis of dental measurements and surface enamel structures, indicates that the crowns belong to two distinct geosaurin taxa (Plesiosuchina? indet. and Torvoneustes? sp.) with different feeding adaptations. The specimens represent the first evidence of Metriorhynchidae from the Czech Republic and some of the youngest metriorhynchid specimens worldwide.
    Źródło:
    Acta Palaeontologica Polonica; 2021, 66, 2; 357-367
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ząb morskiego krokodylomorfa z jury Wyżyny Krakowsko-Częstochowskiej
    A tooth of a marine crocodylomorph from the Jurassic of the Cracow-Czestochowa Upland
    Autorzy:
    Zatoń, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074514.pdf
    Data publikacji:
    2007
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    krokodylomorf
    metriorynchidy
    zęby
    Polska
    Crocodylomorpha
    Metriorhynchidae
    teeth
    Polska
    Opis:
    An incomplete tooth-crown showing the features characteristic of marine crocodylomorphs of the family Metriorhynchidae has been found in glauconitic marls from the uppermost Callovian/lowermost Oxfordian of Ogrodzieniec, situated in the southern part of the Cracow-Czestochowa Upland. The precise taxonomic identification is not possible, but to date only the genus Metriorhynchus has been known from the Callovian. This is the first evidence of Metriorhynchidae in the Cracow-Czestochowa Upland (Polish Jura Chain).
    Źródło:
    Przegląd Geologiczny; 2007, 55, 11; 961-964
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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