I am designing a starfish-like alien and I am wondering if a tube feet like design would work for a large land-dwelling creature?
The creature unlike starfish has strong muscles in its limbs which allow it to leap and crawl at speed but it can also glide across the ground using just its tube feet.
The creatures weight is around 100 kg and is about 3 meters wide. I envisioned them at times with all limbs raised up as their eyes are at the tips of their limbs, so at those times only a small amount of tube feet which are on the underside central body segment and base of the limbs will be supporting the whole weight, but this part is less important than just having functional tube feet.
As it is land-dwelling it wont use the same mechanism of hydraulic pressure the push water to contract the foots muscle but could that mechanism be replaced by something like the papillae of cephalopods skin or another design of muscular protrusions? Would something like papillae or other muscular protrusions acting like tube feet be able to hold up the creatures weight on land and be a main form of locomotion?