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Earliest Mississippian rugose corals of eastern Australia: post-disaster fauna across the Devonian-Carboniferous Boundary?
Denayer, J.; Webb, G.E. (2017). Earliest Mississippian rugose corals of eastern Australia: post-disaster fauna across the Devonian-Carboniferous Boundary? Palaeobiodiversity and palaeoenvironments 97(3): 655-667. https://dx.doi.org/10.1007/s12549-016-0261-0
In: Palaeobiodiversity and palaeoenvironments. SPRINGER HEIDELBERG. ISSN 1867-1594; e-ISSN 1867-1608, meer
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Devonian-Carboniferous Boundary; Extinction; Recovery; Tournaisian;Corals; Gondwana |
| Auteurs | | Top |
- Denayer, J., meer
- Webb, G.E.
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| Abstract |
The most earliest Mississippian rugose corals are post-disaster taxa occurring in a biosphere strongly modified by the crises associated with the Devonian-Carboniferous Boundary. In Western Europe, basal Tournaisian rugose corals belong to the genera Conilophyllum, Hebukophyllum and Kizilia. Conilophyllum and Hebukophyllum are either homeomorphs or close relatives of each other and are likely post-disaster fauna showing wide morphological plasticity but with an unknown origin. Kizilia is a Lazzarus taxon, known also from basal Tournaisian strata of China, that suddenly reappeared at the Devonian-Carboniferous Boundary being related to the mid-Devonian stringophyllids. The deeper basinal facies of Western Europe (Montagne Noire, Rhenish Mts, Thuringia, Upper Franconia) yield mostly small non-dissepimented solitary rugose corals, together with some dissempimented ones, amongst which are mostly long-ranging taxa. In N America, Vesiculophyllum, a genus very similar, and probably related, to Kizilia occurs together with non-dissepimented long-ranging corals. Like most of the basal Tournaisian dissepimented rugose corals, Cystodactylon orbum gen. et sp. nov. and Gudmania darumbalae gen. et sp. nov. from the basal Tournaisian of eastern Australia are interpreted as post-disaster fauna. Their origin is not understood to date and they seemingly left no descent in the Carboniferous. Their stratigraphic range is extremely limited as they so far are known only in small reefs at the base of the lower Tournaisian Gudman Formation in the type area. |
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