[1207.3624] How to Grow an Organism Inside-Out: Evolution of an internal skeleton from an external skeleton in bilateral organisms
Abstract: An intriguing unanswered question about the evolution of bilateral animals with internal skeletons is how an internal skeleton evolved in the first place. Computational modeling of the devel...
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- I can't claim much knowledge regarding developmental biology. The thing that really struck me about the paper was how sparse it was in terms of biology and absence of any references to the existing body of work in this field. The author seems...naive about biology?Aug 29, 2012
- Wait, no. Insects use a different tissue altogether to form an exoskeleton; they aren't in any way homologous. I just read the paper and it makes no sense at all, because they seem to be ignoring the actual biology of the organisms involved.Aug 29, 2012
- Yes, it all seems quite peculiar, hence as I said before, the author seems rather naive about biology...actually I'll correct that statement - the author seems hopelessly ignorant about biology.Aug 29, 2012
- Yeah, the homology between vertebrate and arthropod ectoderm, for instance, is pretty solid. It doesn't even work to say one is an invert of the other: the vertebrate skeleton is mesodermally derived, while the arthropod exoskeleton is ectodermally derived. And both groups generate mesoderm in similar ways, by involution/ingression during gastrulation.
We also have organisms that have internal skeletons in larval forms and ectoskeletons as adults -- echinoderms. They don't turn inside out at metamorphosis.Aug 29, 2012
- There's a big push among the genomics peeps to get stuff on to ArXiv. I hope it won't get abused by bio cranks and make it less appealing. Is that a problem for communities already using it?Aug 29, 2012
- PZ Myers+3I actually put up a post about it -- the closer I looked, the more irritated I got. He got help from Francis Hitching? Jebus.Aug 29, 2012