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    Wyświetlanie 1-3 z 3
    Tytuł:
    Palaeobiogeographic and evolutionary meaning of an early Late Tournaisian ammonoid fauna from the Tafilalt of Morocco
    Autorzy:
    Korn, D
    Bockwinkel, J.
    Ebbighausen, V.
    Klug, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/20107.pdf
    Data publikacji:
    2003
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Carboniferous
    Ammonoide
    ammonoid fauna
    Morocco
    distribution
    Late Tournaisian
    paleobiogeography
    paleontology
    Tournaisian
    Opis:
    An early Late Tournaisian (Early Carboniferous/Mississippian) ammonoid fauna is described from the Tafilalt of south−eastern Morocco. Twelve genera, four of which are new, and eleven new species are represented: Becanites africanus sp. nov., Triimitoceras epiwocklumeriforme gen. et sp. nov., Irinoceras minutum sp. nov., Muensteroceras quadriconstrictum sp. nov., Eurites bouhamedensis sp. nov., Ouaoufilalites ouaoufilalensis gen. et sp. nov., Helicocyclus fuscus sp. nov., Pericyclus mercatorius sp. nov., Orthocyclus(?) sp., Bouhamedites enigmaticus gen. et sp. nov., Winchelloceras antiatlanteum sp. nov., and Progoniatites maghribensis gen. et sp. nov. Palaeogeographic analysis of Late Tournaisian ammonoid assemblages shows strong endemism at the species−level, but genera and families had a nearly global distribution in the equatorial seas. The new fauna contains the stratigraphically oldest known representatives of the important Carboniferous goniatite families Girtyoceratidae and Goniatitidae.
    Źródło:
    Acta Palaeontologica Polonica; 2003, 48, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chondrichthyan remains from the Lower Carboniferous of Muhua, Southern China
    Autorzy:
    Ginter, M.
    Sun, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/22216.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Carboniferous
    China
    Chondrichthyes
    Elasmobranchii
    Euchondrocephali
    Lower Carboniferous
    Muhua
    chondrichthyan
    remains
    tooth
    Tournaisian
    paleontology
    systematics
    morphology
    Opis:
    The shallow water assemblage of chondrichthyan microremains, teeth, tooth plates and scales, from the middle Tournaisian (Mississippian) of the vicinity of Muhua village, Guizhou province, southern China, is thus far the richest and most diverse association of this age collected from a single locality and horizon, and represents a chondrichthyan community very restricted in time and space. It was recovered from a small bioclastic limestone lens, MH−1, occurring among basinal marls near the base of the Muhua Formation, and dated as to the Siphonodella crenulata conodont Zone. The majority of the fauna presented here consists of teeth with euselachian−type bases and crushing crowns belonging to bottom−dwelling durophagous chondrichthyans, most probably feeding on shelly invertebrates such as the abundant brachiopods. We assigned most of these teeth to Euselachii (six species, among them Cassisodus margaritae gen. et sp. nov.), Petalodontiformes (two species), Holocephali (five species), and Euchondrocephali incertae sedis (Cristatodens sigmoidalis gen. et sp. nov.). We also identified primitive polycuspid, clutching teeth representing Phoebodontiformes (Thrinacodus bicuspidatus sp. nov.), Symmoriiformes, and Ctenacanthiformes. The scales are typical growing, compound forms of the protacrodont, ctenacanth, and hybodont types. Two problematic denticulated plates were found, one of which resembles mandibular or palatal plates of Sibyrhynchus (Iniopterygii). Several of the identified chondrichthyan taxa have hitherto been known only from Laurussia, especially from the British Isles and central USA. In particular we found the first record of Chondrenchelyssp. and Diclitodus denshumani outside their type locality. Th. bicuspidatus sp. nov., also known from Nevada, Iran, and NW Australia, appears to be a cosmopolitan, middle Tournaisian index fossil.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new brittle star from the early Carboniferous of Poland and its implications on Paleozoic modern-type ophiuroid systematics
    Autorzy:
    Thuy, B.
    Kutscher, M.
    Plachno, B.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/22083.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    new record
    fossil
    paleontology
    brittle star zob.ophiuroid
    ophiuroid
    Early Carboniferous
    Carboniferous
    Polska
    Paleozoic
    systematics
    Echinodermata
    Ophiuroidea
    evolution
    Tournaisian
    Opis:
    The fossil record of Paleozoic ophiuroids includes a number of forms which share striking similarities with modern relatives in terms of skeletal morphology. These so called modern-type Paleozoic ophiuroids yield an enormous potential for a better understanding of ophiuroid evolution, yet the scarcity of accurate and sufficiently detailed morphological descriptions available to date precludes any further-reaching assessments. Here, we describe an articulated ophiuroid specimen from the Late Tournaisian (early Carboniferous) of Czatkowice quarry, southern Poland, as a new species Aganaster jagiellonicus sp. nov. The good preservation of the specimen allowed for a morphological analysis at a level comparable to recent ophiuroid descriptions. It shows remarkable morphological similarities with extant former ophio-lepidids Ophiomusium and Ophiosphalma. The new find thus contributes to a solid basis for future investigations on the position of the modern-type Paleozoic ophiuroid in the phylogeny of the class.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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