New Precambrain time scale: Reply

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Geology. A new period for the geologic time scale.

clicking here. colleagues, clients, or customers by , you can order high-quality copies for your If you wish to distribute this article to others here. following the guidelines can be obtained by Permission to republish or repurpose articles or portions of articles ): July 24, 2011 www.sciencemag.org (this infomation is current as of The following resources related to this article are availab...

A new time-scale for ray-finned fish evolution.

The Actinopterygii (ray-finned fishes) is the largest and most diverse vertebrate group, but little is agreed about the timing of its early evolution. Estimates using mitochondrial genomic data suggest that the major actinopterygian clades are much older than divergence dates implied by fossils. Here, the timing of the evolutionary origins of these clades is reinvestigated using morphological, ...