Complex sentence: The last alternates between a mobile stage, similar in form to the other pedinellids, and a feeding stage, in which the body is spherical with extended axopods over its entire surface and the flagellum is curled up into a small figure eight.
Split into simpler sentences: The last alternates between a mobile stage, similar in form to the other pedinellids, and a feeding stage. In this the body contracts into a sphere, with extended axopods developing over the entire surface, and the flagellum is curled up into a figure eight.