New insights into the origins and radiation of the mid-Palaeozoic Gondwanan stem tetrapods
| Autor: | John A. Long, Alice M. Clement, Brian Choo |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
010506 paleontology Paleozoic Tetrapodomorpha biology Koharalepis biology.organism_classification 010603 evolutionary biology 01 natural sciences Devonian Paleontology Gondwana Geography Tetrapod (structure) General Earth and Planetary Sciences Late Devonian extinction Siltstone 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Earth and Environmental Science Transactions of the Royal Society of Edinburgh. 109:139-155 |
| ISSN: | 1755-6929 1755-6910 |
| DOI: | 10.1017/s1755691018000750 |
| Popis: | The earliest tetrapodomorph fishes appear in Chinese deposits of Early Devonian age, and by the Middle Devonian they were widespread globally. Evidence for the earliest digitated tetrapods comes from largely uncontested Middle Devonian trackways and Late Devonian body fossils. The East Gondwana Provence (Australasia, Antarctica) fills vital gaps in the phylogenetic and biogeographic history of the tetrapods, with the Gondwanan clade Canowindididae exhibiting a high degree of endemism within the early part of the stem tetrapod radiation. New anatomical details of Koharalepis, from the Middle Devonian Aztec Siltstone of Antarctica, are elucidated from synchrotron scan data. These include the position of the orbit, the condition of the hyomandibular, the shape of the palate and arrangement of the vomerine fangs. Biogeographical and phylogenetic models of stem tetrapod origins and radiations are discussed. |
| Databáze: | OpenAIRE |
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