weiknarf said:
I would have proposed it also.
But usually, birds and mammals (except bats) are Good, while insect-like and reptilian are Evil. It's cliché, but it's unconsciously obeyed. Scaly angel would be weird; and with all those pics of St Michael slaying the dragon; having St Michael being a dragon would be even weirder.
This, of course, is a good reason for creating a draconal.
Bat-celestials would be chiropterals, the name alone is enough to forget the idea (desmodal would be even worse). Viper celestials would be viverals, it's already a bit better.
BTW -- Cervidals are more deer than goats. Deer are cervidae, while goats are caprinae.
Just for fun, what would you say of a porcinal ?

It would fit well with a batracial.
More seriously, delphinal would be interesting. There's not enough aquatic outsiders, and they're rather on the fiendish side.