Aquatic Oligochaete Worm (Opistocysta) is a biological genus in the family Opistocystidae (Aquatic Oligochaete Worm) and order Tubificida (Aquatic Oligochaete Worm).
Opistocysta funiculus
Opistocysta serrata
Opistocysta
Crustipellis
Trieminentia