Quote:
Originally Posted by ATTC
Despite your own vacuous rant this was your only attempt at an explanation for the origin of dinosaurs.
The predictably "authoritative" wikipedia entry that refers to archosaurs which is merely a set of species that INCLUDES dinosaurs. Notice the original post where this is referenced. I have looked much more into this topic than you have or will honestly even be willing to do.
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This is a pretty good example of the problem you're having. You found what you thought was a hole in the theory and ran back here to exploit it without actually attempting to understand what you'd read.
All dinosaurs are considered archosaurs, but not all archosaurs are dinosaurs. What the Wikipedia article was attempting to explain (and did so in relatively simple terms in the second section) was that there are a large number of archosaurs that predate the rise of dinosaurs, but exhibit some features associated with dinosaurs.
Spondylosoma spp. for example, have been dated to about 230 million years ago (the very beginning of the "dinosaur age". There is debate as to whether to they ought to be included as true dinosaurs or grouped with early archosaurs such as
Rauisuchia. If you're still searching for your "transitional" species (a quest that has adequately been addressed by several other posters), this would be it - a species that is neither definitively dinosaur nor pre-dinosaur archosaur, but a species that does not fit neatly into either clade.
Speaking of Rausuchia, it's pretty easy to see the link between
Ticinosuchus (a genus of pre-dinosaur archosaurs) and a dinosaur such as an anklyosaur.
A word of advice as well (and don't take this as an insult or as me being snide, it isn't meant as such) - don't claim to have looked "much more into this topic" than any of us without having made it to paragraph #2 of the wikipedia entry you were provided with.