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SV: ventilation in
Yes, this occurs in some Pelecaniformes. In these cases the respiration
is through "secondarily external nares" at the angle of the mouth. In
the Sulidae even the openings in the bone for the external nares have
There are other groups (outside Pelecaniformes) that have a flap
(operculum) over the nares, e. g. the Rhinocryptidae.
Från: owner-DINOSAUR@usc.edu [mailto:owner-DINOSAUR@usc.edu] För Augusto
Skickat: den 27 september 2009 00:55
Till: Dinosaur Mailing List
Ämne: ventilation in
I know some of you really know about birds... do someone know if there
are cormorants and pelicans with completely obliterated external
nares? In such a case, how do they ventilate? Are they at least
intermittently with the mouth at least somewhat open?