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Re: Strange thoughts on PN - was Re: BAD vs. BADD
On 8/23/06, David Marjanovic <firstname.lastname@example.org> wrote:
Isn't it less useful than:
- primarily flightless dinosaurs
- primarily wingless dinosaurs
- primarily featherless dinosaurs
- Mesozoic dinosaurs
- non-neornithean dinosaurs
- extinct dinosaurs (now _that_ is paraphyletic!)
You could find more. You probably will.
Others non-monophyletic group with usefull meaning in some context:
*Plant-eater dinosaurs - probably poliphyletic (if incisivosaur and
segnosaurs turn out to be really herbivorous theropods). Ex:
plant-eater dinosaurs could exhert a great selective pressure on
*African (North-American, South-American, Chinese, Australian, etc)
dinosaurs. Ex: African dinosaurs constitute a fauna quite similar to
that of North America during Early Cretaceous time.
*Four-legged (two-legged) dinosaurs. Ex: Four-legged dinosaurs
evolved independently many times.
*Female (male, young) dinosaurs. Ex: Female dinosaurs was probably
choosy due to reproductive cost greater then male reproductive cost.