Xenofauna

Humanoid, Human-Like, Human-Resembling
Language-Using or otherwise Sentient
 * Gnomes
 * Yuan-Ti
 * Mind Flayers

Sapience or Lack Thereof Hitherto Unknown
 * Elves
 * Invisible Stalker

'''Non-Sapient, Non-Language-Using
 * Orcs
 * Squealers
 * Trolls

Non-humanoid xenofauna that do not violate known laws of anatomy

Other Xenofauna
 * Ogre
 * Skeleforms