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Sphenochians and birds
I was re-reading recently a _quite_ old but interesting book written by the
Cserkases with help from Olson. It spoke of a possible origin of birds within
the sphenosuchians, the fossil called *protoavis*, having elongated forelimbs
thus thought to have had a arboricole ( is this the correct word? ) life but
found with no evidence of feathers. It was thought to be derived from animals
like *terretrisuchus* placing the first bird-like reptiles back to the triassic
period. The text said that embryology showed that the missing fingers in birds
were not the same as in theropods but were the same to those of crocodilians.
I'm not very sure I've understood all the scientific explanations but it seemed
very convincing to me. How about this theory? Is it still debated or has it
been abandonned for ever?
Thanks for your answers
- The swift bird may steel the farmer's seeds but only the second mouse will
eat his cheese -