The earliest Romulans gave the name Iruhe to an individual or group sentience of lifeforms in residence in the 4408 A/B Trianguli star system that were capable of using powerful broadcast telepathy to alter perceptions of passing travelers, in order to attract outsiders and feed on their neural energy. (TOS - Rihannsu novel: The Romulan Way)

It has been theorized that the Iruhe and the intellivore encountered in 2371 by the USS Enterprise-D are one and the same, or at the very least related. (TNG novel: Intellivore)