Do wyrms have wings?

[Blasphemous]

I was reading the descriptions of great stone wyrms and comparing them with tile images.

My belief has always been that dragons are more like lizards (4 limbs) with wings while wyrms are closer to snakes, with no appendages.
Tiles seem to support that conclusion yet the monster memory of a great stone wyrm contradicts its tile appearance - "(...) and the gusts of wind created by its incredibly massive wings (...)".
Apparently great white wyrms suffer from the same inconsistency although at least in that description, the wings are "tattered and broken", with no sign of wings on the tile image.
No mention of wings for red, black or karmic wyrms though.
Blue wyrms however are mentioned as serpentine, while the great grey wyrm is described as possessing muscled legs, claws and wings.
Tile appearance for all indicates no wyrms have any limbs or wings.

So which is it? Or perhaps this is a bug? Or an oversimplification of the GUI?