You forgot the Laisney-Ege, subtype A caveat; species that exist and are likely sentient, but humans failed to recognized sentience due to humans failure to invent cross species language. This is followed up by sub-tybe C, where AI facilitates communication between species, such as dolphins telling stories around Smart Buoys like campfires on the plains of cavemen days, and the SBs record dolphin histories and allow human participation in stories. Sub-type B, obviously, is AI.