Parakyota

Olimar's Clown (Olimarplasma crypta) is a enigmatic and very unusual unicellular microbe species found on Neo-Macroceana. This species usually habits on hydrothermal vents and animal body parts. 

Also they have both prosperikaryote and prokaryote characteristics and three spiral organelle that is actually evolved from prokaryote symbiont, which is no longer a living, like other organelles that are originated from living beings. However, they don't have cytoskeleton at all.