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Re: flight stroke (pretty short)



----- Original Message -----
From: "Williams, Tim" <TiJaWi@agron.iastate.edu>
Sent: Wednesday, May 08, 2002 6:04 PM

> _Rahonavis_ (probably a weak flier) lived near the end of the Cretaceous.
> [...] _Rahonavis_ may have deliberately kept a conservative anatomy
> (and physiology) because it suited its lifestyle.

It's more complicated than that... *Rahonavis* has much longer wings than
*Archaeopteryx* (and *Confuciusornis*; it's closer to *Sapeornis*) and a
joint between scapula and coracoid (the scapula has a facet for the coracoid
like in Enantiornithes). Also like Enantiornithes and *Patagopteryx*, but
unlike *Confuciusornis*, it grew slowly to stay small.