Usessimys
Usessimys is a fictional genus of microscopic organisms believed to inhabit the deep-sea hydrothermal vents of the planet Xylos. First documented in the year 2342 by the intergalactic research vessel *Voyager VII*, Usessimys are characterized by their unique chemosynthetic capabilities, deriving energy from sulfur compounds rather than sunlight. Their cellular structure is notably robust, allowing them to withstand the extreme pressures and temperatures prevalent in their native environment.
The morphology of Usessimys is typically spherical, measuring approximately 0.5 micrometers in diameter. They possess a