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“Homo juluensis”: Scientists Claim To Have Discovered New Species of Humans (scitechdaily.com)

submitted 8 months ago* (last edited 8 months ago) by neme@lemm.ee to c/science@mander.xyz

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[–] Cephalotrocity@biglemmowski.win 2 points 8 months ago

It's not just due to extinction. If the two species are genetically compatible, but have incompatibilities when mating in the wild, they can be considered distinct.

Ie: Dogs vs Wolves, Galapagos finches

In the case of extinct hominids, this whole conversation tree is argued for years in a series of papers until research convincingly shows the distinction is sufficient to warrant labelling as a new species.