Extinction
Despite being the most species-rich family among the giant lemurs, all four genera of sloth lemur, including Archaeoindris, have gone extinct. Radiocarbon dating of the stratigraphic level of some of the Archaeoindris remains were dated to 8000 BP, while two other specimens were dated to 2362–2149 BP (412–199 BCE) and 2711–2338 BP (761–388 BCE). From these dates, it is likely that Archaeoindris was still alive on the high plateau in 350 BCE when the first humans reached the west coast of Madagascar, despite being rare by that time. Consequently, it would have been especially vulnerable to hunting and habitat loss.
Read more about this topic: Archaeoindris
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