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Table of contents

Hardouvelis, Gikas A. John M. Andrew Karolyi, "undated". Solnik, Bruno H. Lustig, H. RAMOS, Roll, Richard, Vassalou, Maria, Ferreira, Miguel A. Stehle, Richard E, Harvey, Gibbons, Michael R. Frans A.

Diversification, revisited

Wayne E. Siegel, Zhang, Xiaoyan, This would add further evidence that something as simple, yet critical for lineage continuity, as PGC determination mode could account for much of the variation in diversification rates and morphological disparity we see in the history of life. To conclude, we present a caveat and tied to the caveat, a plea.

The caveat is not insignificant but is based on the data available to us. Like Buss before us, our hypothesis is constrained by the available data. Even though there is much more data than in , many of the groups' PGC determination modes are based on one or few exemplars. The same is true for the sister clade comparisons; while convincing in the congruence of sister clade asymmetrical species numbers, the comparisons are few as are the exemplars for those clades.

This leads to the plea. The PGC determination mode needs to be studied in more species to test our hypotheses and our hope is that workers will be intrigued enough to collect such data.

What to Do when Traditional Diversification Strategies Fail – Revisited

BC conducted the analyses and wrote the original draft manuscript. MW and AJ contributed to versions of the draft. All authors contributed to the ideas that form the foundation of the study.


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All authors read and approved the final manuscript. The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. Fontenot and C. Beachy kindly helped with the statistics and T. Struck generously provided the most recent annelid systematics and species diversity. Font and C. Criscione provided insight on flatworms. Vasa is localized and the PGCs are set aside in the early developing embryo, classic marks of a determinative mechanism.

Lin et al. This case is more tricky.

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We think this is probably due to translational control, as recently described in sea urchins Swartz et al. However, if the family Aphididae is compared with its sister family Lachnidae, there is an asymmetry of to species. Perhaps the aphidids evolved a determinative mechanism which led to its rapid diversification von Dohlen and Moran, and actually represent a case in support of our argument. Barraclough, T. Sister-group analysis in identifying correlates of diversification.


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