[Taxacom] How old?

[John Grehan]

OK. Interesting. Looks like the authors did not include that, unless they
did in the article. But as you say, if the spores are land plants then not
100 Ma difference.

John Grehan


On Thu, Jun 14, 2018 at 12:57 PM, Kenneth Kinman <kinman at hotmail.com> wrote:

> John,
>
>        That article is not really accurate.  It was proposed back in 2003
> (an article in Nature) that they had found fossil spores of the earliest
> land plants which were dated to 475 million years ago.   So 500 million
> years ago based on molecular data isn't much different from 475 million
> years ago based on fossil spores.  Needless to say these dates are
> somewhat controversial, but they certainly are not 100 million years
> apart.
>
> Weblink to the 2003 article in Nature:
>
> https://www.nature.com/articles/nature01884
>
>
>                       ------------------------Ken
>
>
> ------------------------------
> *From:* Taxacom <taxacom-bounces at mailman.nhm.ku.edu> on behalf of John
> Grehan <calabar.john at gmail.com>
> *Sent:* Thursday, June 14, 2018 11:24 AM
> *To:* taxacom
> *Subject:* [Taxacom] How old?
>
> In relation to Ken's recent objections about gaps being too big, here's a
> whoppa:
>
> "Now, new research suggests the first land plants began taking root 500
> million years ago, 100 million years earlier than scientists thought. Until
> now, scientists used the oldest known land plant fossils, roughly 420
> million years old, to date their arrival on Earth's continents. In the
> latest study, scientists used molecular clock analysis to more accurately
> pinpoint the origin of the earliest land plants.
> https://www.upi.com/Land-plants-are-older-than-scientists-thought/
> 2731519132728/
>
>
> So, these molecular theorists propose an origin that requires land plants
> to have stuck around for at least 100 Ma with no fossil record.
>
> John Grehan
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