euarchontoglires love



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  • Or conversely, if the mechanisms used by the afrotheria, the xenarthra, and the other mammalian groups that lack an appendix to switch off appendix development were identical, that would suggest that the last common ancestor of the eutheria had that mechanism, lacked an appendix, and those euarchontoglires definitely did re-evolve the appendix.

    Evolution of the appendix? - The Panda's Thumb 2009

  • If the appendixes in marsupials and euarchontoglires are actually homologous, that should imply that their last common ancestor had a cecum/appendix…and the pattern is explained by widespread and frequent loss of the organ.

    Evolution of the appendix? - The Panda's Thumb 2009


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