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New basal "dinosaur" genus classified



Dear All,
First let me say that the "professional" advice was duly noted, but all it demonstrates to me is that professional insider information (which the rest of us might not be privy to for years) gives the "professionals" a distinct advantage. If I had such information, my classifications would be far more cutting edge. It must be nice to have such "light" to "scrutinize with" long before the rest of us do. But I don't consider my energies misspent if I can help explain cladifications to the rest of the world. If I am creating problems for the "professionals", they certainly have the power to block my posts (I believe it only takes 3 people according to the rules). So one of these days my posts could just suddenly stop. So it goes.
Anyway, this new basal almost-dinosaur "Agnostiphys" (spelling?) is a great example of a Plesion that is easily inserted. Below is the classification I posted here about 4 weeks ago, and following that is the same classification modified to reflect the views of Fraser et al. Note that I simply inserted a Plesion for the new genus, and I also moved the {{Ornithischiformes}} marker to show that they are proposing the ejection of herrerasaurs and Eoraptor from the cladistic dinosauria (which was node 4, but becomes node 7). The new topology does not require major name changes with my system (and it can show many alternative toplogies just by simply recoding).


ORDER SAURISCHIFORMES (on Jan. 2)
    1  Lagerpetonidae
    2  Lagosuchidae
    3  Plesion Lewisuchus
    4  {{Ornithischiformes}}
    5  Herrerasauridae
    6  Plesion Eoraptor
    7  Plesion Saturnalia ...
    B    and other sauropodomorph taxa
    C    ...
    8  Guaibasauridae
    9  Coelophysidae
   10  Ceratosauridae ....
         and the rest of theropods


ORDER SAURISCHIFORMES (on Jan. 31) 1 Lagerpetonidae 2 Lagosuchidae 3 Plesion Lewisuchus 4 Herrerasauridae 5 Plesion Eoraptor 6 Plesion "Agnostiphys" (spell?) 7 {{Ornithischiformes}} 8 Plesion Saturnalia ... B and other sauropodomorph taxa C ... 9 Guaibasauridae 10 Coelophysidae 11 Ceratosauridae .... and the rest of theropods

NOTE: It is possible Fraser's cladogram has Herrerasauridae and Eoraptor changing places (but I prefer Jaime's view). In any case, this gives you the overall picture of what is being discussed. If it is too "cluttered", I apologize to Mr. tetanurae, but I think it eliminates the need for even more cladistic "nomenclatural" clutter (now and in the future). And by the way, I did not coin the term plesion or holophyly, both of which have been around for many, many years.
----- Cheers,
Ken Kinman



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