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Lower and Middle Famennian (Upper Devonian) rugose corals from southern Belgium and northern France
Denayer, J.; Poty, E.; Marion, J.-M.; Mottequin, B. (2012). Lower and Middle Famennian (Upper Devonian) rugose corals from southern Belgium and northern France. Geol. Belg. 15(4): 273-283
In: Geologica Belgica. Geologica Belgica: Brussels . ISSN 1374-8505; e-ISSN 2034-1954, meer
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| Trefwoorden |
Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Upper > Famennian
Breviphrentis; Cyathaxonia; Rugosa † [WoRMS]; Tabulata † [WoRMS]
Belgium, Ciney [Marine Regions]; Belgium, Gembloux [Marine Regions]; Belgium, Sivry-Rance [Marine Regions]; Belgium, Verviers [Marine Regions]; France, Nord, Pas-de-Calais
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| Author keywords |
Rugosa, Tabulata, Breviphrentis, Cyathaxonia fauna, post-extinction diversification |
| Abstract |
After the late Frasnian extinctions, the rugose corals slowly recovered during the Lower and Middle Famennian (crepida to marginifera conodont zones) in southern Belgium and northern France (Avesnois) (Namur–Dinant Basin). Six genera represented by seven species are recognized and described here; one species (Breviphrentis superstes) is new. The rugose coral fauna described herein includes small solitary forms belonging to the so-called Cyathaxonia fauna and is similar or very close to those previously described within the same stratigraphic interval in Australia, China and Germany. It also contains a large species belonging to the genus Breviphrentis which was considered as extinct since the end of the Givetian (Middle Devonian) (“Lazarus taxon”). The tabulate corals from the Lower and Middle Famennian of this area, mainly represented by auloporids, are also briefly discussed. Rugosa only constituted a minor part of the fauna after the end-Frasnian crisis in the Namur–Dinant Basin contrary to the brachiopods, which were abundant and relatively diversified, and no rugose corals have been recovered from the early Lower Famennian (triangularis Zone). The first important Famennian coral radiation only took place during the Latest Famennian (Strunian). |
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