It seems to me that it would help clarify where real differences lie and what has to be investigated to reach a conclusion. They are fuzzy. The old working definition of an interbreeding population is also fuzzy.
Hybridisation takes place between species and between genera.
The Basic Type is composed of members which have such similar developmental pathways that hybridisation linkages are feasible. The link is with creatures which reproduce after their kind. That is, there is a constraint which is represented by the developmental pathway. They are terms that have no value as far as taking the debate forward.