B'nurlac was a civilization. In 2358, one of Professor Picard's students mentioned it as an example of an ancient civilization (TNG novel: The Buried Age).

According to Federation archeologist Miliani Langford, the B'nurlac civilization was destroyed when their bioengineered slave races rose up to eradicate them. The B'nurlac were described as having low, ankylosaurian bodies with bony dorsal carapaces and clubbed tails. (TNG novel: The Buried Age)

Jean-Luc Picard used information from a B'nurlac archeological database in his research into mysterious timeless objects rumored to exist from before the legendary galactic Great Extinction. (TNG novel: The Buried Age)