Re: bird evolution

On Mon, 01 Dec 2003 12:43:26 +0000, Dawid Mazurek wrote:

> There were always two theories as of from what type of vertebrates did
> birds arose: from dinosaur or from other reptiles.

Well, except a very few diehard people, virtually all palaeontologists
accept that birds evolved from theropod dinosaurs.

> Now we know that: a)
> birds probably arose from theropod dinosaurs; and b) that classic
> Reptilia is so really polifiletic, and that all classis as Dinosauria or
> Synapsida should be seperate types in Vertebrata or should divided into
> two types: Synopsida and Sauropsida. So "reptiles" is only a
> non-proffesional name, and what for one scientist is a "reptile" for
> another may not be.

Not sure what you meant by "non-professional name". Reptilia is clearly
defined in both Linnean & Cladisitic classification, though they are
different. 

-- 

Gautam Majumdar

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