In Black Marsh do reptiles, dinosaurs and dragons exist?

Black Marsh is a swampy place home to Argonians, Argonians are sort of reptiles, dinosaurs such as spinosaurus lived in swampy places in reality, and dragons such as blood dragon would fit fine in Black Marsh but do they exist there. I know that Skyrim is like Norway, Sweden and a little bit like Finland. Elsweyr is like half desert half savannah. Cyrodiil is like Italy and Germany, but what of the rest.

Skyrim has nordic creatures and animals

Cyrodiil has nordic and middle europian animals and creature

Elsweyr has african creatures and animals including elephants 

Morrowind has creatures and animals from dark and swampy places

Valenwood has probably cougars, gorillas, chimps, tigers... (jungle-animals)

Black Marsh has hopefully reptiles, swampy-dinosaurs... (I don't know)

and so on.

Hopefully TES Online will clear that out. My question is WHAT KIND OF ANIMALS AND CREATURES EXIST IN BLACK MARSH?