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I'm looking for some diagnoses that I can't found. I'd like to know
diagnoses of subdivisions within Tyrannosauridae, Troodontidae,
Ornithomimosauria and Dromaeosauridae. I'm also confused about the
Bullatosauria, Spinosauridae & Irritator mess. Where does Archaeornithoides
fit; and Baryonyx?
Can someone help?

Thanks in advance

Felix Landry
e-mail: forelf@internet19.fr