There is a distinct local form of the marginated tortoise on the island, however, and that seems to have originated from a deliberate introduction by humans, perhaps by Greek or Roman landowners in the classical antiquity. While the local marginated tortoises show evidence of pronounced genetic drift and may thus justifiably regarded as a subspecies despite the absence of lineage sorting, the Greek tortoises of Sardinia are probably best considered an introduced population not yet worthy of taxonomic separation pending further research.
There is a distinct local form of the marginated tortoise on the island, likely introduced by humans in ancient times, possibly by Greek or Roman landowners. While these local tortoises show genetic drift and may be considered a subspecies despite lacking lineage sorting, the Greek tortoises of Sardinia are probably best viewed as an introduced population that doesn't yet warrant taxonomic separation until further research is conducted.