The rare species of Ibex, native to northern Spain, was officially declared Extinct in 2000 when the last known individual was found dead.
However, due to the efforts of several companies that are globally making an investment in storing tissue samples of species from around the world, the DNA of the extinct species was then able to be reintroduced into an egg of a sister goat and the species was reborn.
Although the individual did not survive long, with congenital defects of the lungs (which are consistent with other cloned specimens issues) the reborn species soon fell back into extinction.
Although the animal perished, this effort has broken forever the barrier between extinct and not-extinct. One can only wonder what eventual terminology will be created for a "re-animated" species.