Bibliographic Details
| Title: |
Good Genes and Good Luck: Ammonoid Diversity and the End-Permian Mass Extinction. |
| Authors: |
Brayard, Arnaud, Escarguel, Gilles, Bucher, Hugo, Monnet, Claude, Brühwiler, Thomas, Goudemand, Nicolas, Galfetti, Thomas, Guex, Jean |
| Source: |
Science (pre-March 2025). 8/28/2009, Vol. 325 Issue 5944, p1118-1121. 4p. |
| Subjects: |
Ammonoidea, Species diversity, Biological extinction, Fossil marine animals, Fossil cephalopoda, Permian paleoentomology, Triassic paleopedology, Benthos |
| Abstract: |
The end-Permian mass extinction removed more than 80% of marine genera. Ammonoid cephalopods were among the organisms most affected by this crisis. The analysis of a global diversity data set of ammonoid genera covering about 106 million years centered on the Permian-Triassic boundary (PTB) shows that Triassic ammonoids actually reached levels of diversity higher than in the Permian less than 2 million years after the PTB. The data favor a hierarchical rather than logistic model of diversification coupled with a niche incumbency hypothesis. This explosive and nondelayed diversification contrasts with the slow and delayed character of the Triassic biotic recovery as currently illustrated for other, mainly benthic groups such as i bivalves and gastropods. [ABSTRACT FROM AUTHOR] |
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| Database: |
Psychology and Behavioral Sciences Collection |
