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  • 1
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    The Carboniferous Timescale (2020)
    London : The Geological Society
    Details
    Keywords: Carboniferous; Pangaea; ice age; biochronology; biostratigraphy; magnetostratigraphy; radioisotopic age
    Description / Table of Contents: 10 December 2020 --- Proposed chronostratigraphic units for the Carboniferous and Early Permian of the southwestern Gondwana margin / Carlos R. González and Pamela Díaz Saravia / Geological Society, London, Special Publications, 512, https://doi.org/10.1144/SP512-2020-48 --- 7 December 2020 --- A geomagnetic polarity timescale for the Carboniferous / Mark W. Hounslow / Geological Society, London, Special Publications, 512, https://doi.org/10.1144/SP512-2020-102 --- 1 December 2020 --- Carboniferous Smaller Foraminifera: Convergences and Divergences / Daniel Vachard and François Le Coze / Geological Society, London, Special Publications, 512, https://doi.org/10.1144/SP512-2020-42 --- 30 November 2020 --- Carboniferous Crinoids / William I. Ausich, Thomas W. Kammer and Georgy V. Mirantsev / Geological Society, London, Special Publications, 512, https://doi.org/10.1144/SP512-2020-71 --- 27 November 2020 --- Carboniferous macrofloral biostratigraphy – an overview / Stanislav Opluštil, Christopher J. Cleal, Jun Wang and Mingli Wan / Geological Society, London, Special Publications, 512, https://doi.org/10.1144/SP512-2020-97 --- 26 November 2020 --- The biostratigraphy of Carboniferous chondrichthyans / Michał Ginter / Geological Society, London, Special Publications, 512, https://doi.org/10.1144/SP512-2020-91 --- 25 November 2020 --- Carboniferous isotope stratigraphy / Jitao Chen, Bo Chen and Isabel P. Montañez / Geological Society, London, Special Publications, 512, https://doi.org/10.1144/SP512-2020-72 --- 24 November 2020 --- Carboniferous conodont biostratigraphy / James E. Barrick, Alexander S. Alekseev, Silvia Blanco-Ferrera, Natalia V. Goreva, Keyi Hu, Lance L. Lambert, Tamara I. Nemyrovska, Yuping Qi, Scott M. Ritter and Javier Sanz-López / Geological Society, London, Special Publications, 512, https://doi.org/10.1144/SP512-2020-38
    Pages: Illustrationen, Diagramme, Karten
    Edition: online first
    URL: https://sp.lyellcollection.org/online-first/512
    Language: English
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    E-BOOK
  • 2
    Electronic Resource
    Electronic Resource
    The oldest dinosaurs (1992)
    Springer
    Naturwissenschaften 79 (1992), S. 171-172 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01134434
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    Paper (German National Licenses)
    Fulltext
  • 3
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    A new baenid turtle from the early Paleocene (Torrejonian) of New Mexico and a species-level phylogenetic analysis of Baenidae (2016)
    Paleontological Society
    Details
    Publication Date: 2016-07-02
    Description: New cranial and postcranial material of the baenid turtle Neurankylus from the Paleocene Nacimiento Formation (Torrejonian NALMA) of northwestern New Mexico represents a new species, Neurankylus torrejonensis . The material consists of a fragmented but mostly complete skull, a partial carapace and plastron, portions of both humeri, a partial pelvis, a complete right femur, and a distal phalanx. The small, undivided cervical scale, wide vertebrals, complete ring of marginals, and large size (carapace length 520 mm) diagnose the new taxon as belonging to Neurankylus . The narrow fifth vertebral scale and scalloped posterior shell margin reveal affinities with Neurankylus baueri Gilmore, 1916, which is known from Campanian sediments in New Mexico and Utah. The holotype of Neurankylus torrejonensis is the youngest known specimen of the Neurankylus lineage, which is known to reach at least back to the Late Cretaceous (Santonian). A nearly complete species-level analysis of baenids confirms the basal placement of Neurankylus outside of Baenodda and the split of Baenodda into two primary subclades, herein named Palatobaeninae and Eubaeninae.
    Print ISSN: 0022-3360
    Electronic ISSN: 1937-2337
    Topics: Geosciences
    Published by Paleontological Society
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  • 4
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    Vertebrate palaeontology in Central America: a narrative and analytical history (2016)
    Geological Society (of London)
    Details
    Publication Date: 2016-05-25
    Description: Central American vertebrate fossils are primarily of late Cenozoic age and represent all of the major taxonomic groups of vertebrates. The vertebrate fossils of Central America play an important part in understanding the great American biotic interchange after the closure of the Panamanian isthmus. We divide the narrative history of vertebrate palaeontology in Central America into three periods: earliest discoveries (1858–1936); a developing record (1937–80); and a vertebrate palaeontological renaissance (1980–present). An analytical history, applying the ‘model’ proposed by Basalla of how science diffuses into any non-European nation, indicates a poor fit of Central American vertebrate palaeontology to this ‘model’. Central American vertebrate palaeontology mostly remains in the first phase of Basalla's ‘model’, primarily providing vertebrate fossils for study by palaeontologists in the USA; phase 2 (colonial science) was essentially skipped and phase 3 (establishment of an independent scientific programme) is in an early stage. The development of vertebrate palaeontology in Central America better fits the idea that all three phases of Basalla's ‘model’ are ongoing and intermingled. Vertebrate palaeontology is a science of little economic significance and this largely explains its slow development in Central America, where political instabilities and economic disadvantages have long affected the development of science.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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  • 5
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    Permian tetrapod biochronology, correlation and evolutionary events (2017)
    Geological Society (of London)
    Details
    Publication Date: 2017-09-30
    Description: The most extensive Permian tetrapod (amphibian and reptile) fossil records from the western USA (New Mexico to Texas) and South Africa have been used to define 11 land vertebrate faunachrons (LVFs). These are, in ascending order, the Coyotean, Seymouran, Mitchellcreekian, Redtankian, Littlecrotonian, Kapteinskraalian, Gamkan, Hoedemakeran, Steilkransian, Platbergian and Lootsbergian. These faunachrons provide a biochronological framework with which to assign ages to, and correlate, Permian tetrapod fossil assemblages. Intercalated marine strata, radioisotopic ages and magnetostratigraphy were used to correlate the Permian LVFs to the standard global chronostratigraphic scale with varying degrees of precision. Such correlations identified the following significant events in Permian tetrapod evolution: a Coyotean chronofaunal event (end Coyotean); Redtankian events (Mitchellcreekian–Littlecrotonian); Olson's gap (late Littlecrotonian); a therapsid event (Kapteinskraalian); a dinocephalian extinction event (end Gamkan); and a latest Permian extinction event (Platbergian–Lootsbergian boundary). Problems of incompleteness, endemism and taxonomy, and the relative lack of non-biochronological age control continue to hinder the refinement and correlation of a Permian timescale based on tetrapod biochronology. Nevertheless, the global Permian timescale based on tetrapod biochronology is a robust tool for both global and regional age assignment and correlation. Advances in Permian tetrapod biochronology will come from new fossil discoveries, more detailed biostratigraphy and additional alpha taxonomic studies based on sound evolutionary taxonomic principles.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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  • 6
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    The Permian timescale: an introduction (2017)
    Geological Society (of London)
    Details
    Publication Date: 2017-11-25
    Description: The Permian timescale has developed over about two centuries of research to the current chronostratigraphic scale advocated by the Subcommission on Permian Stratigraphy of three series and nine stages: Cisuralian (lower Permian) – Asselian, Sakmarian, Artinskian, Kungurian; Guadalupian (middle Permian) – Roadian, Wordian, Capitanian; and Lopingian (upper Permian) – Wuchiapingian and Changhsingian. The boundaries of the Permian System are defined by global stratotype sections and points (GSSPs) and the numerical ages of those boundaries appear to be determined with a precision better than 1. Nevertheless, much work remains to be done to refine the Permian timescale. Precise numerical age control within the Permian is very uneven and a global polarity timescale for the Permian is far from established. Chronostratigraphic definitions of three of the nine Permian stages remain unfinished and various issues of marine biostratigraphy are still unresolved. In the non-marine Permian realm, much progress has been made in correlation, especially using palynomorphs, megafossil plants, conchostracans and both the footprints and bones of tetrapods (amphibians and reptiles), but many problems of correlation remain, especially the cross-correlation of non-marine and marine chronologies. The further development of a Permian chronostratigraphic scale faces various problems, including those of stability and priority of nomenclature and concepts, disagreements over changing taxonomy, ammonoid v. fusulinid v. conodont biostratigraphy, differences in the perceived significance of biotic events for chronostratigraphic classification and correlation problems between provinces. Future research on the Permian timescale should focus on GSSP selection for the remaining undefined stage bases, the definition and characterization of substages, and further development and integration of the Permian chronostratigraphic scale with radioisotopic, magnetostratigraphic and chemostratigraphic tools for calibration and correlation.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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  • 7
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    The Permian timescale: an introduction (2017)
    Geological Society (of London)
    Details
    Publication Date: 2017-11-30
    Description: The Permian timescale has developed over about two centuries of research to the current chronostratigraphic scale advocated by the Subcommission on Permian Stratigraphy of three series and nine stages: Cisuralian (lower Permian) – Asselian, Sakmarian, Artinskian, Kungurian; Guadalupian (middle Permian) – Roadian, Wordian, Capitanian; and Lopingian (upper Permian) – Wuchiapingian and Changhsingian. The boundaries of the Permian System are defined by global stratotype sections and points (GSSPs) and the numerical ages of those boundaries appear to be determined with a precision better than 1. Nevertheless, much work remains to be done to refine the Permian timescale. Precise numerical age control within the Permian is very uneven and a global polarity timescale for the Permian is far from established. Chronostratigraphic definitions of three of the nine Permian stages remain unfinished and various issues of marine biostratigraphy are still unresolved. In the non-marine Permian realm, much progress has been made in correlation, especially using palynomorphs, megafossil plants, conchostracans and both the footprints and bones of tetrapods (amphibians and reptiles), but many problems of correlation remain, especially the cross-correlation of non-marine and marine chronologies. The further development of a Permian chronostratigraphic scale faces various problems, including those of stability and priority of nomenclature and concepts, disagreements over changing taxonomy, ammonoid v. fusulinid v. conodont biostratigraphy, differences in the perceived significance of biotic events for chronostratigraphic classification and correlation problems between provinces. Future research on the Permian timescale should focus on GSSP selection for the remaining undefined stage bases, the definition and characterization of substages, and further development and integration of the Permian chronostratigraphic scale with radioisotopic, magnetostratigraphic and chemostratigraphic tools for calibration and correlation.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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  • 8
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    Outline of a Permian tetrapod footprint ichnostratigraphy (2016)
    Geological Society (of London)
    Details
    Publication Date: 2016-12-11
    Description: Tetrapod footprints are among the most common fossil remains in continental Permian strata and thus are of biostratigraphic interest. Based on the vertical distribution of the 13 best-known Permian tetrapod ichnotaxa, three footprint biochrons are suggested for the period: (1) Dromopus – latest Carboniferous (approximately Gzhelian) to late Early Permian (approximately Artinskian), representing ichnoassemblages dominated by tracks of temnospondyls, reptiliomorphs, pelycosaurs and early diapsids; (2) Erpetopus – late Early Permian (approximately Kungurian) to late Middle Permian (approximately Capitanian), representing ichnoassemblages dominated by tracks of non-diapsid eureptiles; and (3) Paradoxichnium – Late Permian (Wuchiapingian and Changhsingian), representing ichnoassemblages dominated by tracks of medium- and large-sized parareptiles, non-diapsid eureptiles and early saurians. This is the most conservative ichnostratigraphic concept, and it may be possible to refine it to almost stage-level resolution by future comprehensive analysis, especially of Permian captorhinomorph and therapsid footprints. Other major tasks to improve Permian tetrapod footprint ichnostratigraphy include enhanced knowledge of Middle Permian tetrapod footprints, and clarification of the palaeoenvironmental factors that may control the distribution of tetrapod footprints in space and time.
    Print ISSN: 0305-8719
    Electronic ISSN: 2041-4927
    Topics: Geosciences
    Published by Geological Society (of London)
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  • 9
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    Vertebrate Trackways Among a Stand of Supaia White Plants on An Early Permian Floodplain, New Mexico (2012)
    Paleontological Society
    Details
    Publication Date: 2012-07-01
    Description: A bstract Little is known about the habit and spatial distribution of Early Permian tropical vegetation, a sharp contrast with the Pennsylvanian from which many in-situ "T 0 " assemblages are known. Even less is known about the potential interaction of plants and vertebrates. Here we report the discovery of a small stand of 34 probable Supaia White plants from the Abo Formation of New Mexico. The plants were growing on a mudflat, subject to periodic flooding and exposure. The same mudflat hosts trackways of vertebrates that appear to have walked around or between the Supaia plants. The stems are preserved as molds, and vary from 20 mm to 70 mm in diameter, averaging 42.4 mm, indicating heights of approximately 2.5–4 m. The plants, which may be described as small trees given their estimated height, are as close as 110 mm to their nearest neighbor and average nearly 300 mm apart. A series of lines or filled fissures, which we interpret as roots, radiates from the base of each stem. Leaves of Supaia thinfeldioides White are the only foliage found in association with these stems, on bedding planes above and at the base of the lowest expression of the stem molds. Associated vertebrate trackways either congregate around some of the stems or wend their way between the stems and include those of a single large temnospondyl amphibian ( Limnopus Marsh) and many of small predatory parareptiles ( Dromopus Marsh). This study demonstrates that S. thinfeldiodes were small-statured, weedy, opportunistic plants. It also shows that contemporaneous vertebrates prowled such environments, presumably either for food, shelter, or both given detectable pace and path.
    Print ISSN: 0022-3360
    Electronic ISSN: 1937-2337
    Topics: Geosciences
    Published by Paleontological Society
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  • 10
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    No gap in the Middle Permian record of terrestrial vertebrates: COMMENT (2013)
    Geological Society of America (GSA)
    In: Geology
    Details
    Publication Date: 2013-08-09
    Print ISSN: 0091-7613
    Electronic ISSN: 1943-2682
    Topics: Geosciences
    Published by Geological Society of America (GSA)
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