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On Friday December 6th 2013, at 8pm est,7pm cst and 5 pm pst we will be having a discussion on Rhipidistians Lobefin Fish with Ken McKeighen. Should be rather interesting to learn how these fish have evolved and survived over the years. Please join us as Ken will joined by co-host Ken Boorman and a very informative episode.
The Rhipidistia were lobe-finned fishes that are the ancestors of the tetrapods. Taxonomists traditionally considered the Rhipidistia a subgroup of Crossopterygii that described a group of fish that lived during the Devonian consisting of the Porolepiformes and Osteolepiformes. However as cladistic understanding of the vertebrates has improved over the last few decades a monophyletic Rhipidistia is now understood to be an ancestor for the whole of Tetrapoda and of the extant lungfishes.
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It's good to talk.