Riileb precursor species

A species of insects were native to the planet Riileb in Hutt Space where they eventually evolved into the sentient Riileb species. The species were social in nature and possessed antennae. They lived on the few islands amongst the swamps of their homeworld where they built complex labyrinth like mounds to live in.

Behind the scenes
The Riilebs' precursor species was first mentioned in 1997 in the thirteenth issue of the Star Wars Adventure Journals, a series of supplements to Star Wars: The Roleplaying Game, a roleplaying game by West End Games. They were mentioned in the article "Alien Encounters" which was written by Brian Smithson and was later republished in a reduced form in the book Alien Encounters in 1998 which was a collection of all the "Alien Encounters" articles compiled by Paul Sudlow.