Yallitos was a planet located in the Yalitia star system in the space of the galaxy's Delta Quadrant. This world was the home to the Yallitian civilization and Koko whale lifeforms. The Talaxian traveller Neelix visited Yallitos once, in the summer, and believed Yallitos to be the coldest world in that quadrant of space. (ST reference: Star Trek Cookbook)