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Some fans believe the ancient humanoid seen when the interplanetary DNA code is assembled in ST:TNG "The Chase" may have been the same species known as "The Preservers" (ST:TOS "The Paradise Syndrome") ProfessorTrek 01:19, July 20, 2011 (UTC)

There were also the Promellians and the Menthars from ST:TNG "Booby Trap".

The Iconians of course and probably the Hur'Q.

There's also been mention of the Debrune, Sargon's race, the D'Arsay, the Kurlans, the inhabitants of Exo III, and the Dominion might also qualify, although they're not extinct.- 03:07, February 11, 2012 (UTC)

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