Lonesome George (Chelonoidis nigra abingdonii) was the last remaining example of the Pinta race or subspecies of Giant Galapagos Tortoises. He was cared for at the Darwin Centre on Santa Cruz Galapagos Ecuador. The subspecies, abingdoni from Pinta Island, is now considered extinct following the death of Lonesome George on June 24, 2012. He was believed to have been more than 100 years old.

http://www.pettortoise.co.uk/lonesome_george.php

http://www.telegraph.co.uk/earth/wildlife/9468918/Lonesome-George-could-be-resurrected-after-cells-are-frozen-by-scientists.html

IUCN Red List EXTINCT (EX)
A taxon is Extinct when there is no reasonable doubt that the last individual has died. A taxon is presumed Extinct when exhaustive surveys in known and/or expected habitat, at appropriate times (diurnal, seasonal, annual), throughout its historic range have failed to record an individual. Surveys should be over a time frame appropriate to the taxon’s life cycle and life form.

http://www.iucnredlist.org/static/categories_criteria_3_1