I have wondered the same thing, my guess would be yes. I try to think of it like we do with the Kingdom, Phylum, Class, Order, Family, Genus, Species. Dragons would be considered in the Order or Family section I am guessing because their Class would be Reptile ( I am pretty sure this is how it would go) I am leaning more towards the "Order", like how "Primates" are an "Order" from the "Class" Mammal. So "Dragons" would be an "Order" from the "Class" Reptile. If I am correct (or at least in the ball park) this would mean that there would still be different Family, Genus and Species of Dragons, which would result in a plethora of different types and looks of dragons.
Heh,I'll make sure you can never make that grin again.I'll chop you up!Ground you up!Dry you in the sun!Break you to pieces!Bury you in the ground!Piss on you!Then i'll dig you up!Pull you!Stretch you!Drag you around!I'll Never Forgive You-Viktor