[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: More questions about birdies....



In a message dated 95-10-17 22:29:40 EDT, DSmith0531@aol.com writes:

>What do we know about the flying abilities of pre-triosseus-canal birds? 

_Archaeopteryx_ definitely did not have the triosseous canal, but it did have
flight feathers and presumably was able to fly well enough to warrant
evolving the flight-feather shape. In _Archaeopteryx_, the glenoid was
rotated outward from its original downwardly directed orientation (seen in
most cursorial theropods), a position en route to the upward orientation seen
in advanced flying birds.

G.O.