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Re: neoflightless dinosaurs

On Sunday, September 29, 2002, at 12:26  AM, GSP1954@aol.com wrote:

So the conventional hypothesis is deceased. There are two
alternatives. Dromaeosaurs split off before the Archy-bird clade and
developed advanced flight independently. Or, Archaeopteryx split off before
the dromy-bird clade and the sickle-claws inherited advanced flight from
basal birds. Both are definitely plausible.

What about a third hypothesis: Archy is more closely related to modern birds, but flight developed earlier, before the Dromy + Aves node. So both may have inherited advanced flight, but were in the process of losing it.

Just playing devils advocate. (But before you ask, my favourite movie is not King Kong. :-))

John Conway, Palaeoartist

"All art is quite useless." - Oscar Wilde

Systematic ramblings: http://homepage.mac.com/john_conway/
Palaeoart: http://homepage.mac.com/john_conway/_palaeoart.html