What type of group is created when hybridization occurs between two known species?

When hybridization occurs between two known species, a genospecies is created. This term refers to a group of individuals that are genetically similar enough to be considered a distinct species, often arising from the combination of genetic material from two parent species. Genospecies emphasizes the genetic makeup and relationships of organisms, which becomes particularly relevant when studying hybrids and their unique genetic characteristics that distinguish them from their parent species.

In contrast, the other terms represent different concepts in taxonomy. A polyphyletic group includes organisms that are grouped together based on traits but do not share a common ancestor, indicating a more artificial grouping that does not adequately reflect evolutionary relationships. A paraphyletic group encompasses a common ancestor and some, but not all, of its descendants, leading to incomplete lineage representation. Lastly, the term "biospecies" is not commonly used in scientific taxonomy, which further differentiates the concept of genospecies by focusing specifically on genetic relationships rather than broader biological characteristics.

Therefore, the correct choice reflects the genetic implications of hybridization, categorizing the resultant group effectively based on their genetic lineage and characteristics.