T'Lor was a Tiburonian Starfleet science officer stationed on Deep Space 9 in the early 2370s.
He was part of an away team that visited the cormaline rich Torga IV to assess the possibility of establishing a mining operation there. T'Lor was killed by a Jem'Hadar strike force after the Starfleet officers found a crashed Jem'Hadar ship. (DS9: "The Ship")
T'Lor was played by stunt actor Ken Lesco who received no credit for this appearance.
Although it was not established in dialogue, the script says he is from Tiburon
. Also, T'Lor has the enlarged ears common to natives of that world.