[Taxacom] Phylogenetic divergence dating

Kenneth Kinman kinman at hotmail.com
Wed Jun 7 21:43:17 CDT 2017


Well,

       I include Homo sapiens heidelbergensis in Homo sapiens, and it goes back to about 600,000 to 700,000 years ago.  And it is known from Spain, so specimens in Morocco 300,000 years ago  would be no surprise at all.


       As for an East African center of origin, that is only valid if one excludes heidelbergensis from Homo sapiens.  Did they compare these specimens to heidelbergensis?


________________________________
From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu> on behalf of John Grehan <calabar.john at gmail.com>
Sent: Wednesday, June 7, 2017 9:14 PM
To: taxacom
Subject: [Taxacom] Phylogenetic divergence dating

Just an interesting recent claim for fossil Homo sapiens at 300,000 years,
100,000 older than the previous oldest fossil

"The newfound Homo sapiens fossils — three young adults, one adolescent and
a child of 7 or 8 — date back roughly 300,000 years, says a study in this
week’s *Nature*. The next-oldest fossils of Homo sapiens, the scientific
name for humans, are about 200,000 years old."

Just makes the point that the oldest fossil is only the oldest fossil and
therefore the minimum age of a taxon, as is any molecular extrapolation no
matter how many molecular systematists continue to misrepresent their
divergence estimates.

The 300,000 year old fossils are from Morocco, which does not fit well with
the East Africa center of origin model - although no doubt someone later
will say that the Moroccan fossils are not really H. sapiens.

John Grehan
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