User blog comment:WikiBuilder1147/Classification of species/@comment-1743498-20130212212521/@comment-4844180-20130212222109

Firstly: If there is a species that can go into more than one class, then make another class that is a hybrid between the two which in turn has it's own specialised sections.

Secondly: The one tier system of this that you made wouldn't let people see what sort of creature there is, because they would have to look at every single creature page made to look at those combinations already made.

With the heirarchy you could see what hasn't been made yet by making stuff that doesn't fit into a certain section of the heirarchy and then making more sections to accomadate it. This would also allow for more "alien" life if people do this.

Thirdly: The categories you have made there can easily be accomadated into the heirarchy system.