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The Cambrian Conundrum: Early Divergence and Later Ecological Success in the Early History of Animals
- D. Erwin, M. Laflamme, S. Tweedt, E. Sperling, D. Pisani, K. Peterson
- Geography, Environmental ScienceScience
- 25 November 2011
A compilation of the patterns of fossil and molecular diversification, comparative developmental data, and information on ecological feeding strategies indicate that the major animal clades diverged many tens of millions of years before their first appearance in the fossil record.
Pattern of marine mass extinction near the Permian-Triassic boundary in South China.
- Y. Jin, Y. Wang, W. Wang, Q. Shang, C. Cao, D. Erwin
- Environmental Science, GeologyScience
- 21 July 2000
A statistical analysis of the occurrences of 162 genera and 333 species confirms a sudden extinction event at 251.4 million years ago, coincident with a dramatic depletion of delta13C(carbonate) and an increase in microspherules.
Calibrating the End-Permian Mass Extinction
High-precision geochronologic dating constrains probable causes of Earth's largest mass extinction and reveals that the extinction peak occurred just before 252.28 ± 0.08 million years ago, after a decline of 2 per mil (‰) in δ13C over 90,000 years, and coincided with a δ 13C excursion that is estimated to have lasted ≤20,000 Years.
Gene Regulatory Networks and the Evolution of Animal Body Plans
This work identifies a class of GRN component, the kernels, of the network, which, because of their developmental role and their particular internal structure, are most impervious to change.
The Fossils of the Burgess Shale
Extinction: How Life on Earth Nearly Ended 250 Million Years Ago
- D. Erwin
This book describes the development of filter feeding in the Permo-Triassic period and its role in the evolution of Jurassic and Tournaisian dinosaurs.
The Permo–Triassic extinction
- D. Erwin
- Geography, Environmental ScienceNature
The end-Permian mass extinction brought the Palaeozoic great experiment in marine life to a close during an interval of intense climatic, tectonic and geochemical change. Improved knowledge of latest…
Abrupt and Gradual Extinction Among Late Permian Land Vertebrates in the Karoo Basin, South Africa
The vertebrate fossil data show a gradual extinction in the Upper Permian punctuated by an enhanced extinction pulse at the Permians-Triassic boundary interval, particularly among the dicynodont therapsids, coinciding with negative carbon-isotope anomalies.
Lessons from the past: Biotic recoveries from mass extinctions
- D. Erwin
- Geography, Environmental ScienceProceedings of the National Academy of Sciences…
- 1 December 2000
Empirical studies reveal a more complex dynamic, including positive feedback and an exponential growth phase during recoveries, which is far from a model of refilling ecospace, which must be rebuilt during recovery.
DISPARITY: MORPHOLOGICAL PATTERN AND DEVELOPMENTAL CONTEXT
- D. Erwin
- Environmental Science, Geography
- 1 January 2007
Concern with disparity is a question about temporal variation in the production of morphological innovations, a debate over the relative significance of the generation of new morphologies vs. differential probabili- ties of their successful introduction, and the relative importance of constraint, convergence and contingency in the evolution of form.