Rykogene
From Warhammer 40k - Lexicanum
The Rykogene were a Xenos species that was encountered by the Imperium in the Great Crusade, and which later attempted to kill the Emperor during a boarding attack on his flagship, the Bucephelus. The attempt failed; following this, the Imperium launched a campaign of annihilation against the Rykogene, which caused their species's extinction.[1]
See also
Sources
- 1: The Horus Heresy Book Seven - Inferno, pg. 283