Ordovician faunas of Burgess Shale type
Van Roy, P.; Orr, P.J.; Botting, J.P.; Vinther, J.; Lefebvre, B.; el Hariri, K.; Briggs, D.E.G. (2010). Ordovician faunas of Burgess Shale type. Nature (Lond.) 465(7295): 215-218. https://dx.doi.org/10.1038/nature09038
In: Nature: International Weekly Journal of Science. Nature Publishing Group: London. ISSN 0028-0836; e-ISSN 1476-4687, meer
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| Auteurs | | Top |
- Van Roy, P., meer
- Orr, P.J.
- Botting, J.P.
- Vinther, J.
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- Lefebvre, B.
- el Hariri, K.
- Briggs, D.E.G.
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| Abstract |
The renowned soft-bodied faunas of the Cambrian period, which include the Burgess Shale, disappear from the fossil record in the late Middle Cambrian, after which the Palaeozoic fauna(1) dominates. The disappearance of faunas of Burgess Shale type curtails the stratigraphic record of a number of iconic Cambrian taxa. One possible explanation for this loss is a major extinction(2,3), but more probably it reflects the absence of preservation of similar soft-bodied faunas in later periods(4). Here we report the discovery of numerous diverse soft-bodied assemblages in the Lower and Upper Fezouata Formations (Lower Ordovician) of Morocco, which include a range of remarkable stem-group morphologies normally considered characteristic of the Cambrian. It is clear that biotas of Burgess Shale type persisted after the Cambrian and are preserved where suitable facies occur. The Fezouata biota provides a link between the Burgess Shale communities and the early stages of the Great Ordovician Biodiversification Event. |
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