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Les Ostracodes du Famennien inférieur au stratotype de Coumiac (Montagne Noire, France): la reconquête post-événementielleLower Famennian ostracods from the Coumiac stratotype (Montagne Noire, France):the post-event recovery
Lethiers, F.; Casier, J.-G. (1999). Les Ostracodes du Famennien inférieur au stratotype de Coumiac (Montagne Noire, France): la reconquête post-événementielle Lower Famennian ostracods from the Coumiac stratotype (Montagne Noire, France): the post-event recovery. Bull. Kon. Belg. Inst. Natuurwet. Aardwet. = Bull. - Inst. r. sci. nat. Belg., Sci. Terre 69: 47-66
In: Bulletin van het Koninklijk Belgisch Instituut voor Natuurwetenschappen. Aardwetenschappen = Bulletin de l'Institut Royal des Sciences Naturelles de Belgique. Sciences de la Terre. KBIN: Brussel. ISSN 0374-6291, more
Peer reviewed article  
Available in  Authors 
Keywords
    Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian
    Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Upper
    Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Upper > Famennian
    Ostracoda [WoRMS]
    France [Marine Regions]
    Marine/Coastal
Author keywords
    Ostracods - Extinction - Recovery - Lower Famennian - Coumiac, Ostracodes - Extinction - Reconquête - Famennien inférieur - Coumiac
Authors  Top 
  • Lethiers, F.
  • Casier, J.-G., more
Abstract
    Fifty-nine ostracod species are recorded in the lower Famennian at Coumiac. Podocopida, with numerous Bairdiacea, predominate; Myodocopida remain very scarce and Metacopida are absent. Eleven species belong to the Thuringian ecotype. This assemblage shows that the paleoenvironment was a well oxygenated outer carbonated platform, moderately deeper than during the late Frasnian. Seventeen surviving species and forty-two newly arriving species recolonize biotopes during 1.5 million years following the F/F boundary. Some of these last come from subspeciations, others from speciations. All are allopatric. either between different platform areas or between plaform and epibathyal areas. The forty-two species occurring in the early Famennian at Coumiac are figured. Six new species are erected: Rectella? abdita nov. sp., Grammia famenniensis nov. sp., Orthonaria? biconvexa nov. sp., Famenella inflexa nov. sp., Acratia sagittaeformis nov. sp. and Bairdia quasifabaeformis nov. sp.
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