Here is my part of an art trade with
It's the descendants of his Snaiadi species, the polypods.
Here's a quick cap on each species:
Windriders: These are polypods that have developed their visual sails (yes, they see with these sail-like things, I figure it must be kinda blurry) into flexible kites that catch the wind. They still retain their visual sense though! They can flex their eyesails for better focus. Their ten legs have developed into a combo of filter feeder appendages and oars... and they eat airborne seeds. Capable of darting a short distance to evade. They live exclusively in the sky, since they can't move on land and would become easy prey.
Skyspeeders: Maybe the Snaiadi answer to our mysterious rods, they have evolved eyesail stalks that enables it to see in almost 360 degrees. Denser nerves in the sails makes for a somewhat better vision, and like the Windriders, they can't move in the ground save for slithering. They have developed their legs into oarlike wings, and they can beat at high rates of speed. Since they have better vision they tend to hunt stuff, usually by zooming into them.
Landthorns: These are not related to the Waterthorns in the same family, but they both developed similar tactics. These Landthorns crawl at a snail's pace, while their legs develop into spines. Not poisonous, but these legs are very hard. They are saprovores, and their eyesails haven't improved much.
Waterthorns: Living in the seas are Waterthorns. They have developed smaller but more effective eyesails, and they are poisonous. A prick can cause hallucinations and fever, and prolonged exposure to this toxin can kill. It mainly crawls on the seafloor, but can swim awkwardly when necessary. Its spines are flexible, unlike the Landthorns. Eats bigger mollusks by boring their shells with acid, and eating their insides.