I might be too proud of this exchange:
The three species are chimp, gorilla, and mathematician. - sullivant #siaman12
@michiexile Heh, three species of what genus?
@puellavulnerata Let's see… Gastrointestinal canal, 2x nostril-to-mouth, I'd say genus 3 unless the mathematician has piercings.
@michiexile I should have seen that coming... :)