User blog:Nomad27/New Species Category

I've been going around looking at a few species most notably the Immortal Species, a few races though I have noticed are ones who have a very long rate of maturity, that is species that do not mature for years or even decades. This is just a though idea but maybe we can create a category for this type? Don't exactly have a word to describe this category but I'm sure there is one, a scientific one.