DOI: 10.1016/j.palaeo.2016.05.029
论文题名: Diversity and morphological evolution of Jurassic belemnites from South Germany
作者: Dera G. ; Toumoulin A. ; de Baets K.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 457 起始页码: 80
结束页码: 97
语种: 英语
英文关键词: Belemnite
; Cephalopod
; Evolution
; Extinction
; Morphological disparity
英文摘要: Belemnites are extinct cephalopods whose evolutionary history is representative of successful adaptive radiations during the Mesozoic. Nevertheless, a detailed understanding of the dynamics and palaeoenvironmental drivers of this evolution is still lacking. In order to fill this gap, we analyze the diversity and morphological disparity of Jurassic rostra from South Germany, and compare these patterns with other Euro-Boreal trends. We show that, after an early apparition of few dissimilar groups during the Hettangian-Sinemurian interval, belemnites experienced four periods of diversification (i.e., Early Pliensbachian, Middle-Late Toarcian, Early Bajocian, and Oxfordian) marked by morphological disparifications of rostra towards forms potentially optimized for different hydrodynamic properties. These adaptive radiations were interrupted at regional scale by four biological crises corresponding to morphological bottlenecks (i.e., Pliensbachian-Toarcian, Aalenian, Late Bajocian, and Kimmeridgian). Most of them were morphoselective, except the Aalenian extinction, which could be related to a prominent sea level fall. By comparing our results to palaeoenvironmental data, we show that warm temperate seawater temperatures might have favoured the diversification of belemnites, potentially by accelerating their metabolic rates, the population turnovers, and the evolutionary rates on the long term. Conversely, cooling or hyperthermal events correspond with biological crises. Migrations towards refuge areas located in the Arctic and Mediterranean domains could have been key factors for rapid post-crisis recoveries. Finally, the available data suggest a trend towards increased streamlining of the rostrum through the Jurassic. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68343
Appears in Collections: 过去全球变化的重建
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作者单位: GET, UMR 5563, Université Paul Sabatier, CNRS, IRD, Toulouse, France; Geozentrum Nordbayern, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
Recommended Citation:
Dera G.,Toumoulin A.,de Baets K.. Diversity and morphological evolution of Jurassic belemnites from South Germany[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,457