Real World article
(written from a Production point of view)

The Serilians were a space-faring species mentioned in the script for the Star Trek: Deep Space Nine episode "Meridian". Before an ambassador from this species arrived at space station Deep Space 9, the security protocols were checked by Kira Nerys. She requested that Odo inform her when the ambassador arrived.

According to, the conjectural homeworld of this species was named Serilia and the Serilians were identified as Tiron's species.