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Troodon

North American Tyrannosaurids what is Described that are Sold

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Susan from PA

Thanks for putting this together for us, Troodon!  I used to get hung up on identifying specimens from the Judith River Formation down to species name.  I don't have much from this area, but not having something specific on my labels drove me crazy.  It doesn't anymore, and I changed my labels to Tyrannosaurid indet.  In my mind, I can't justify putting a name to a certain specimen unless there is scientific evidence out there to support it.  

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doushantuo

All of which means that i feel compelled to post a bit of testing of  tyrannosaurid cladistics.From 2009,no less,so hopelessly outdated...

In the interest of completeness.

Put 3 cladists in a room with the same dataset,and three different cladograms will emerge,even with the same outgroup choice

Seresatte2009TyraCompCladistics.pdf

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doushantuo

Another view,from NATURE.

 

brusatytnaturetryransrep20252.pdf

 

 

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Susan from PA

The above article in lecture form.  Sometimes, it's easier to hear it than read it.  :popcorn:

 

 

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