Les Ostracodes survivants a l'extinction du Dévonien Supérieur dans la coupe du Col de Devils Gate (Nevada, U.S.A.)
Casier, J.G.; Lethiers, F. (1998). Les Ostracodes survivants a l'extinction du Dévonien Supérieur dans la coupe du Col de Devils Gate (Nevada, U.S.A.). Géobios 30(6): 811-821. dx.doi.org/10.1016/S0016-6995(97)80181-7
In: Géobios. Association Européenne de Paléontologie: Lyon. ISSN 0016-6995; e-ISSN 1777-5728, meer
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| Trefwoorden |
Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Upper > Famennian
Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Upper > Frasnian
Ostracoda [WoRMS]
USA, Nevada [Marine Regions]
Marien/Kust |
| Author keywords |
extinction; Frasnian-Famennian boundary; ostracods; Lazarus effect;Devils Gate; Nevada |
| Auteurs | | Top |
- Casier, J.G.
- Lethiers, F.
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| Abstract |
For the study of the Late Devonian mass extinction in the Devils Gate Pass section of Nevada, ostracods have been extracted from 36 samples of the linguiformis (latest Frasnian) and of the Early and Middle triangularis (earliest Famennian) conodont Zones. Among 45 ostracod species of the late Frasnian, 12 survived the Frasnian-Famennian biological crisis and are dealt with detail herein. Seven of these species are new and 5 are formally described: Westmontia devilensis nov. sp., Decoranewsomites angelicus nov. sp., Acratia "Cooperuna" nevadaensis nov. sp., Bairdiacypris martinae nov. sp. and Bairdiacypris anteroangulosa nov. sp. This assemblage does not contain any metacopids and the survival of some species is considered to be related to the "Lazarus effect". The surviving species were probably ubiquitous, and they seem to have subsisted in a very shallow-marine environment and during the influx of hypoxic water onto the shelf. Such a shelter possibly played the same role for the survival of the ostracod fauna at Coumiac, France. This process is probably widespread during the Frasnian-Famennian boundary crisis. |
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