Rhombozoa is a term used to represent a group of parasitic flatworms that have a rhomboid shape. However, this term is not widely used in the scientific community. Instead, other terms such as Monogenea, Polyopisthocotylea, or Gyrodactylidea may be used to describe these flatworms. Monogenea refers to a group of flatworms that have only one set of reproductive organs, while Polyopisthocotylea refers to those that have multiple sets of reproductive organs. Gyrodactylidea, on the other hand, refers to a specific family of parasitic flatworms that are known to infect fish. Thus, in scientific literature, different terms may be used to represent the same group of organisms, depending on their specific characteristics.