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Re: Phylogenetic taxonomic definitions in Xiaotingia paper



True.  It's almost as though we need some kind of code to govern
phylogenetic nomenclature, isn't it?  A kind of "phylo-code", if you
will.

Someone ought to write one.

-- Mike.



On 27 July 2011 22:48, Mickey Mortimer <mickey_mortimer111@msn.com> wrote:
>
> Ack.  I wish people would stop redefining clades left and right.
>
> Coelurosauria is part of a simple node-stem triplet.  We don't need to define 
> Sinraptor and Carcharodontosaurus out of it.
> Avialae is ALSO part of a simple triplet, and Troodon does not need to be 
> defined out of it.
>
> The whole point of phylogenetic definitions is to be stable so that we know 
> what clade we're discussing at any time.  If we keep on adjusting them, that 
> defeats the purpose.
>
> Mickey Mortimer
>
>
> ----------------------------------------
>> Date: Wed, 27 Jul 2011 13:44:06 -0400
>> From: tholtz@umd.edu
>> To: dinosaur@usc.edu
>> Subject: Phylogenetic taxonomic definitions in Xiaotingia paper
>>
>> >From the supplemental material:
>>
>> "We used the following definitions of several higher-level theropod taxa
>> in this paper: Coelurosauria, the most inclusive clade containing Passer
>> domesticus Linnaeus 1758 but not Allosaurus fragilis Marsh 1877, Sinraptor
>> dongi Currie and Zhao 1993, and Carcharodontosaurus saharicus Depéret and
>> Savornin 1927; Paraves, the most inclusive clade containing Passer
>> domesticus Linnaeus 1758 but not Oviraptor philoceratops Osborn 1924;
>> Avialae, the most-inclusive clade containing Passer domesticus Linnaeus
>> 1758 but not Dromaeosaurus albertensis Matthew and Brown 1922 or Troodon
>> formosus Leidy 1956; Deinonychosauria, the most-inclusive clade containing
>> Dromaeosaurus albertensis Matthew and Brown 1922 but not Passer domesticus
>> Linnaeus 1758; Archaeopterygidae, the most inclusive clade including
>> Archaeopteryx lithographica Meyer 1861 but not Dromaeosaurus albertensis
>> Matthew and Brown 1922 or Passer domesticus Linnaeus 1758."
>>
>>
>> Thomas R. Holtz, Jr.
>> Email: tholtz@umd.edu Phone: 301-405-4084
>> Office: Centreville 1216
>> Senior Lecturer, Vertebrate Paleontology
>> Dept. of Geology, University of Maryland
>> http://www.geol.umd.edu/~tholtz/
>> Fax: 301-314-9661
>>
>> Faculty Director, Science & Global Change Program, College Park Scholars
>> http://www.geol.umd.edu/sgc
>> Fax: 301-314-9843
>>
>> Mailing Address: Thomas R. Holtz, Jr.
>> Department of Geology
>> Building 237, Room 1117
>> University of Maryland
>> College Park, MD 20742 USA
>>
>
>
>