Purpletop

The purpletop has split from stickyballs. It is very similar to its ancestor but forms a hollow sphere rather than a solid one. The purpletop cells have differentiated into two types. Those that no longer function photosynthetically (dark violet colored) but continue to excrete the sticky fluid. They operate as a pseudo-foot, sticking to anything like its ancestor but with more potent adhesion, making it very difficult to forcibly detach. The remaining cells (purple colored) have become super efficient photosynthesis.

The purpletop's hollow interior serves no purpose at the moment but it could evolve to use this space as storage (e.g. water during dry periods). This enables it to survive under arid desert conditions.