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    Wyświetlanie 1-13 z 13
    Tytuł:
    A glimpse into ancient food storage: Sequestrichnia and associated nucleocave Chondrites from Eocene deep-sea deposits
    Autorzy:
    Šamánek, J.
    Vallon, L.H.
    Mikuláš, R.
    Vachek, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/31341414.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Zoophycos brianteus
    Chondrites intricatus
    Helminthopsis tenuis
    Tubulichnium mediterranensis
    Scolicia strozzii
    Dactyloidites
    Megagrapton irregulare
    Planolites
    Eocene
    deep-sea deposit
    Zoophycos
    trace fossil
    fossil
    flysch
    Western Carpathians Mountains
    Czech Republic
    Źródło:
    Acta Palaeontologica Polonica; 2022, 67, 3; 767-779
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Chaetognath grasping spines from the Upper Mississippian of Arkansas [USA]
    Autorzy:
    Doguzhaeva, L A
    Mutvel, H.
    Mapes, R.H.
    Powiązania:
    https://bibliotekanauki.pl/articles/23070.pdf
    Data publikacji:
    2002
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    grasping spine
    fossil
    USA
    protoconodont
    organic spine
    phosphatized fossil
    morphology
    Arkansas
    ultrastructure
    Chaetognatha
    paleontology
    chaetognath
    Opis:
    Previously unidentified tiny (about 0.5 mm in length), hollow, gently curved, serrated spines probably originally composed of horny, organic fibers from the Upper Mississippian (Middle Chesterian = Namurian A equivalent or lower Serpukhovian) of Arkansas (USA) are described, and their probable chaetognath affinities are discussed. The specimens are preserved in an oval accumulation (about 15 mm long and 6 mm wide) of approximately 200 specimens within a small (about 25 mm in length) phosphatic concretion. For comparison, the grasping spines of the Recent chaetognath Eukrohnia hamata were examined. The Arkansas specimens are named Eoserratosagitta serrata gen. et sp. nov., and this genus is assigned to the Phylum Chaetognatha. The Upper Mississippian spines are also compared with protoconodonts. This comparison supports the hypothesis that the chaetognaths may have existed in the Cambrian.
    Źródło:
    Acta Palaeontologica Polonica; 2002, 47, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Enrolment in a Middle Ordovician agnostoid trilobite
    Autorzy:
    Bruton, D L
    Nakrem, H.A.
    Powiązania:
    https://bibliotekanauki.pl/articles/22605.pdf
    Data publikacji:
    2005
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    trilobite
    Trilobita
    preservation
    Agnostida
    Middle Ordovician
    Virginia
    Ordovician
    agnostoid trilobite
    Edinburg Formation
    life habit
    Trinodus elspethi
    paleontology
    Opis:
    Study of silicified material of Trinodus elspethi, from the Edinburg Formation, Virginia, USA, shows there is no gliding of distal parts of segments but an articulating furrow and opposing flange with prongs, acting as apodemes for muscle attachment, allowed cephalon and thorax to move as a single unit. Articulation between thorax and pygidium was more rigid with prongs from the thorax articulating in sockets on the pygidium. Support is given to the view that agnostoids lived partially enrolled with cephalon and pygidium gaping. They are unique in lacking an articulating half−ring between cephalon and thorax and the hinge joint is modified medially to provide an opening for what is interpreted as an exhalatory organ through which water passed during feeding and swimming. Peculiarities of the thorax are connected with the presence of only two thoracic segments articulating as a unit with distal tips directed anteriorly rather than posteriorly. Otherwise articulating half rings are present in the rest of the thorax and pygidium and lack of articulating facets is not unique. It is concluded that agnostoids can be shown to be trilobites.
    Źródło:
    Acta Palaeontologica Polonica; 2005, 50, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new needle stonefly with parasitic mites from the Eocene Baltic amber
    Autorzy:
    Chen, Z.-T.
    Liu, H.-L.
    Powiązania:
    https://bibliotekanauki.pl/articles/31341385.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Insecta
    Baltileuctra dewalti
    new species
    needle stonefly
    morphology
    Leuctridae
    Plecoptera
    parasitic mite
    Eocene
    Baltic amber
    Źródło:
    Acta Palaeontologica Polonica; 2022, 67, 3; 649-654
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New data on cranial anatomy of the ceratopsian dinosaur Psittacosaurus major
    Autorzy:
    You, H -L
    Tanoue, K.
    Dodson, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/20202.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    dinosaur
    Yixian Formation
    Cretaceous
    Dinosauria
    paleontology
    China
    Ceratopsia
    Psittacosaurus major
    ceratopsian dinosaur
    Liaoning
    anatomy
    Opis:
    An exceptionally preserved skull and mandible of ceratopsian dinosaur Psittacosaurus major revealed many anatomical details such as the existence of an elliptical median interpremaxillary foramen, a prominent neurovascular canal on the internal wall of the beak, long, slightly divergent basipterygoid processes developed as vertical blades with a deep cleft between them, and horizontally oriented vomer. The new specimen shows two autapomorphies of Psittacosaurus major, the transversely narrow dorsal skull roof and very prominent dentary flanges, confirming the presence of two large−skulled psittacosaur species in the Lujiatun Bed of the Lower Cretaceous Yixian Formation in Beipiao City, western Liaoning Province, China, the longand narrow−skulled P. major, and broad−skulled P. lujiatunensis.
    Źródło:
    Acta Palaeontologica Polonica; 2008, 53, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Triassic coleoid beaks and other structures from the Calcareous Alps revisited
    Autorzy:
    Doguzhaeva, L.A.
    Summesberger, H.
    Brandstaetter, F.
    Gruber, D.
    Tintori, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/31341404.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleontology
    Triassic
    coleoid
    beak
    Cephalopoda
    Coleoidea
    Phragmoteuthis
    vertebrate
    invertebrate
    structure
    cephalopod
    Phragmoteuthis bisinuata
    Lunzoteuthis schindelbergensis
    Glochinomorpha stifeli
    Calcareous Alps Mountains
    Alps Mountains
    Źródło:
    Acta Palaeontologica Polonica; 2022, 67, 3; 655-666
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new basal eusauropod from the Middle Jurassic of Yunnan, China, and faunal compositions and transitions of Asian sauropodomorph dinosaurs
    Autorzy:
    Xing, L.
    Miyashita, T.
    Currie, P.J.
    You, H.
    Zhang, J.
    Dong, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/945600.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Dinosauria
    Sauropoda
    Eusauropoda
    Jurassic
    eusauropod
    paleontology
    Middle Jurassic
    Yunnan province
    China
    fauna composition
    transition
    Asia
    sauropodomorph dinosaur
    dinosaur
    Opis:
    Many sauropod ghost lineages cross the Middle Jurassic, indicating a time interval that requires increased sampling. A wide taxonomic spectrum of sauropodomorphs is known from the Middle Jurassic of China, but the braincase of a new sauropod, named here Nebulasaurus taito gen. et sp. nov., is distinct. Nebulasaurus is sister taxon to Spinophorosaurus from the Middle Jurassic of Africa and represents a clade of basal eusauropods previously unknown from Asia. The revised faunal list indicates dramatic transitions in sauropodomorph faunas from the Jurassic to Cretaceous of Asia; these are consistent with geographic isolation of Asia through the Late Jurassic. Non-sauropod sauropodomorphs, non-mamenchisaurid eusauropods (including basal macronarians), and mamenchisaurids successively replaced previous grades through the Jurassic, and titanosauriforms excluded all other sauropod lineages across the Jurassic–Cretaceous boundary.
    Źródło:
    Acta Palaeontologica Polonica; 2015, 60, 1; 145-154
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A partial skeleton of an enantiornithine bird from the Early Cretaceous of Northwestern China
    Autorzy:
    Lamanna, M.C.
    You, H.-L.
    Harris, J.D.
    Chiappe, L.M.
    Ji, S.-A.
    Lu, J.-C.
    Ji, Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/20670.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    China
    Cretaceous
    Early Cretaceous
    paleontology
    skeleton
    partial skeleton
    bird
    Aves
    enantiornithine bird
    Enantiornithes
    Xiagou Formation
    remains
    Opis:
    Although recent discoveries from Lower Cretaceous sediments in northeastern China have greatly improved our understanding of the initial stages of avian diversification in eastern Asia, the early evolution of Aves elsewhere on the continent remains poorly understood. In 2004, a collaborative field effort directed by personnel from the Chinese Academy of Geological Sciences and Carnegie Museum of Natural History recovered multiple partial to nearly complete avian skeletons from outcrops of the Lower Cretaceous Xiagou Formation exposed in the Changma Basin of northwestern Gansu Province, China. Here we describe a thrush−sized partial skeleton comprised of a fragmentary pelvic girdle and largely complete hind limbs. A phylogenetic analysis of 20 avian ingroup taxa and 169 anatomical characters places the specimen in Enantiornithes, and within that clade, in Euenantiornithes. When coupled with additional recent discoveries from the Changma Basin, the new skeleton improves our understanding of early avian evolution and diversification in central Asia.
    Źródło:
    Acta Palaeontologica Polonica; 2006, 51, 3
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An ankylosaurid dinosaur from Mongolia with in situ armour and keratinous scale impressions
    Autorzy:
    Arbour, V.M.
    Lech-Hernes, N.L.
    Guldberg, T.E.
    Hurum, J.H.
    Currie, P.J.
    Powiązania:
    https://bibliotekanauki.pl/articles/21760.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    ankylosaurian dinosaur
    dinosaur
    Mongolia
    Dinosauria
    Ankylosauria
    Ankylosauridae
    Tarchia
    Saichania
    Late Cretaceous
    Cretaceous
    paleontology
    Opis:
    A Mongolian ankylosaurid specimen identified as Tarchia gigantea is an articulated skeleton including dorsal ribs, the sacrum, a nearly complete caudal series, and in situ osteoderms. The tail is the longest complete tail of any known ankylosaurid. Remarkably, the specimen is also the first Mongolian ankylosaurid that preserves impressions of the keratinous scales overlying the bony osteoderms. This specimen provides new information on the shape, texture, and ar− rangement of osteoderms. Large flat, keeled osteoderms are found over the pelvis, and osteoderms along the tail include large keeled osteoderms, elongate osteoderms lacking distinct apices, and medium−sized, oval osteoderms. The specimen differs in some respects from other Tarchia gigantea specimens, including the morphology of the neural spines of the tail club handle and several of the largest osteoderms.
    Źródło:
    Acta Palaeontologica Polonica; 2013, 58, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A second Cretaceous ornithuromorph bird from the Changma Basin, Gansu Province, northwestern China
    Autorzy:
    You, H.-L.
    Atterholt, J.
    O'Connor, J.K.
    Harris, J.D.
    Lamanna, M.C.
    Li, D.-Q.
    Powiązania:
    https://bibliotekanauki.pl/articles/22506.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Cretaceous
    ornithuromorph bird
    bird
    Aves
    Ornithuromorpha
    Aptian
    Early Cretaceous
    paleontology
    Changma basin
    Gansu province
    China
    Opis:
    Finely−bedded lacustrine deposits of the Aptian (Lower Cretaceous) Xiagou Formation exposed in the Changma Basin of Gansu Province, northwestern China, have yielded numerous fossil vertebrate remains, including approximately 100 avian specimens. Though the majority of these birds appear referable to the ornithuromorph Gansus yumenensis, a number of enantiornithine fossils have also been recovered. Here we report on a specimen consisting of a complete, three−dimensionally preserved sternum, furcula, and sternal ribs that represents a second ornithuromorph taxon from the Xiagou Formation at Changma. The fossil exhibits morphologies that distinguish it from all previously−known Xiagou birds and demonstrate that it represents a derived non−ornithurine member of Ornithuromorpha. Though it is morphologically distinct from the equivalent elements of all other described ornithuromorphs, the material is too incomplete to justify the erection of a new taxon. Nonetheless, it increases the taxonomic diversity of the Xiagou avifauna, thereby expanding our knowledge of Early Cretaceous avian diversity and evolution.
    Źródło:
    Acta Palaeontologica Polonica; 2010, 55, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An ailuravine rodent from the lower Eocene Cambay Formation at Vastan, western India, and its palaeobiogeographic implications
    Autorzy:
    Rana, R S
    Kumar, K.
    Escarguel, G.
    Sahni, A.
    Rose, K.D.
    Smith, T.
    Singh, H.
    Singh, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/23190.pdf
    Data publikacji:
    2008
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Ischyromyidae
    Cambay Formation
    paleontology
    Euromys inexpectatus
    Euromys cardosoi
    Rodentia
    Eocene
    India
    Ailuravinae
    Meldimys musak
    Mammalia
    ailuravine rodent
    new species
    Ailuravus michauxi
    rodent
    paleobiogeography
    Western India
    Opis:
    A new ailuravine rodent, Meldimys musak sp. nov. (Mammalia: Rodentia, Ischyromyidae), is recorded from the lower Eocene lignites of western India. It is the oldest record of Rodentia from India. M. musak is more derived than the earliest Eocene ailuravine Euromys cardosoi from Portugal and more generalized than late early Eocene E. inexpectatus and Ailuravus michauxi from France. Its dental morphology closely corresponds to the middle early Eocene species M. louisi, which lived about 52 Ma in Western Europe. Meldimys was previously known only from Europe, and ailuravines were previously reported only from Europe and North America. Its occurrence in India allows the first direct correlation between the early Eocene land mammal horizons of Europe and India, and raises the possibility of a terrestrial faunal exchange between India and Eurasia close to the Palaeocene–Eocene transition.
    Źródło:
    Acta Palaeontologica Polonica; 2008, 53, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    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:
    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
      Wyświetlanie 1-13 z 13

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