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Re: Ichthyornis Predentary?

Jaime wrote...

Darren Naish wrote of the suggestion that *Ichthyornis* 
probably didn't have a predentary, forwarding the idea that 
this was neomorphic to ornithischians exclusively within 
dinosaurs (it would be neomorphic even if convergent, but
that's not the point); 

No - it was Dave Marjanovic who was noting suggestions 
that ichthyornithids might not have this structure. Among 
Aves, only hesperornithiforms and teratornithids then have 
predentaries - it therefore seems the neomorph neomorphed 
twice within Theropoda, not three times.

Darren Naish
School of Earth & Environmental Sciences
University of Portsmouth UK, PO1 3QL

email: darren.naish@port.ac.uk
tel: 023 92846045