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Re: Triassic mammal-like reptiles?
Let's see if I can send mail to the list from home...
3) While Ax did suggest including them as mammals,
(Hennig himself seems to have implied the same. But he feared fossils
The reverse solution, restraining popular taxa to
crown clades, has proven much more effective (although in some
cases still contentious, e.g., _Aves_).
This has only been used for quite a few cases, and many people, such as
myself, don't see why there should be a default solution in the first place.