Image: Ichthyosauria phylogeny

Description: Phylogeny of Ichthyosauria. Thin lines represent ghost lineages, thick black lines indicate the stratigraphic range of a species. Thick grey lines refer to the straticraphic range of the corresponding genus.
Title: Ichthyosauria phylogeny
Credit: http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0029234
Author: Valentin Fischer, Michael W. Maisch, Darren Naish, Ralf Kosma, Jeff Liston6, Ulrich Joger, Fritz J. Krüger, Judith Pardo Pérez, Jessica Tainsh, Robert M. Appleby
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