Re: ptero embryo ID

[David Marjanovic <david.marjanovic@gmx.at>]

----- Original Message -----
From: "Dann Pigdon" <dannj@alphalink.com.au>
Sent: Saturday, April 09, 2005 11:27 PM

> David Peters wrote:
>
> >  JH wrote: You'd expect a lot of anatomical development and change
> > between embryo and adult.
> >
> > >>>>>  Not if they were able to fly shortly after hatching (sensu
> > Unwin). And not if they were days or minutes from hatching as this one
> > apparently was.
>
> How do hatchling megapodes compare skeletally to adults? They can fly
> soon after hatching, but they still seem to have the usual juvenile
> 'cuteness'.

Those features that are not age-related but size-related must still change 
with growth. An example is relative eye size; relative brain size probably 
also counts. Those features that are directly related to growth must of 
course also change. This concerns various sutures and fusions all over the 
skeleton.