Answer: heliozoan

AnswerCrossword Clue
heliozoanrelated to the Heliozoa, sun-animalcules, an order of Protozoa also HELIOZOIC / a member of the Heliozoa
heliozoanprotozoan of the order Heliozoa, having a spherical body and radiating pseudopods
heliozoanbelonging or pertaining to the Heliozoa