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

RE: SPECULATION: pterosaur extinction versus bird survival



Don't highly pneumaticised bones of Pterosaurs point to an air sac system?
Also, I thought that ventilation in birds was mainly accomplished by
expansion and contraction of abdominal air sacs, which pteros seem to have
had space for.