Hypermastigia (hypermastigids) within microbiology, is the name used for a group of flagellate endosymbionts which were placed under the Excavata class.
They are now treated as belonging to one of the groups Tritrichomonadea, Hypotrichomonadea, or Trichomonadea within the Parabasalia.
[1] This microbiology-related article is a stub.
You can help Wikipedia by expanding it.