A dermal specialization?

Question

A dermal specialization characteristic of the surviving dinosaur descendants in subphylum vertebrata, class aves

Answer 1

The following links have a detailed account about the question you have asked = ===To write / type it here will require a lot of my time and space = so click on the links and browse through =====

http://en.wikipedia.org/wiki/Aves#Dinosa...

http://en.wikipedia.org/wiki/Origin_of_b...

http://en.wikipedia.org/wiki/Aves#Feathe...

http://en.wikipedia.org/wiki/Aves#Scales

http://en.wikipedia.org/wiki/Feather

http://en.wikipedia.org/wiki/Lizards#Des...

Answer 2

FEATHERS

Aves= birds and yes birds are classified under the lizard order in taxonomy that is based on actual ansectral relationships