tag:blogger.com,1999:blog-38902250.post7124456386941412037..comments2023-10-25T04:04:15.348-07:00Comments on When Pigs Fly Returns: If you didn't know it before, you know it nowZachhttp://www.blogger.com/profile/08692080707969333711noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-38902250.post-8904670328873290462008-01-22T17:08:00.000-08:002008-01-22T17:08:00.000-08:00Dinosauria is defined as:The most recent common an...<B><I>Dinosauria is defined as:<BR/><BR/>The most recent common ancestor of Triceratops and Columba, and all its descendants.</I></B><BR/><BR/>Uh...no. It's not <I>Columba</I> (though that'd be a good choice given its common-ness!), it's <I>Passer</I>. Specifically, a definition has to be anchored by species, not "genera" (because genera are clades, and things with more than one member can't anchor a clade because there's too much risk that one of the members might later be yanked out and put somewhere else, destabilizing the definition -- I seem to have learned that <A HREF="http://www.taxonsearch.org/dev/taxon_edit.php?Action=View&tax_id=343" REL="nofollow">the hard way</A>), so the definition <I>can't</I> be anchored by <I>Triceratops</I> and <I>Passer</I> (or <I>Columba</I>) -- it's properly anchored by <I>Triceratops horridus</I> and <I>Passer domesticus</I>.dinogamihttps://www.blogger.com/profile/14959197175594052460noreply@blogger.com