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Origine des tétrapodes, scénarios, théories erronées et évènements évolutifs

Abstract : A renewal of interest has been led to the problem of origin of tetrapods for several years. It is concerned, among other topics, with the age of their oldest representative and the life environment of their Devonian species. After the most recent discoveries (Eifelian tracks and traces from Poland), it seems that we can date the most ancient tetrapod at ca. – 397 My, or even older when taking into account an earliest Devonian trace fossil from Australia at ca. – 416 My. This makes the origin of tetrapods some 30 My older than what was thought some years ago. Palaeoenvironmental analyses which have been made either on Devonian fossil tetrapod-bearing sediments or on Middle to Late Devonian ichthyofaunal assemblages with tetrapod remains do conclude to shallow water coastal marine to land-sea transitional environments (intertidal, lagoonal, « lagoonal-marine »). A critical analysis of most recent publications on this matter leads to some general considerations about « events » in evolutionary palaeontology, about the fate of scenarios in palaeontology, and about the persistence of erroneous theories.
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  • HAL Id : hal-01331834, version 1



Alain Blieck. Origine des tétrapodes, scénarios, théories erronées et évènements évolutifs. Annales de la Société Géologique du Nord, 2010, 2e série, 17, pp.37-46. ⟨hal-01331834⟩



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