[Rockhounds] 0.76 meter-long Arthropleura fossil found on Northumberland beach

[Timothy Blackwood]

No worries. At 35% atmospheric O2 back then, the diffusion rate wouldn't have been much of a problem. : )


Timothy J. Blackwood
E-mail: Tim_Blackwood1 at hotmail.com<mailto:Tim_Blackwood1 at hotmail.com>
Phone: (218) 999-0603
Home Address:
120 NW 5th Street Apartment 101
Cohasset, Minnesota, USA 55721

________________________________
From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> on behalf of Tim Fisher <nospam at orerockon.com>
Sent: Saturday, January 1, 2022 5:39 PM
To: 'Rockhounds at drizzle.com: A mailing list for rock and gem collectors' <rockhounds at rockhounds.drizzle.com>
Subject: Re: [Rockhounds] 0.76 meter-long Arthropleura fossil found on Northumberland beach

I should have read your reply first lol. So it's the diffusion rate that
affects oxygen transfer. Same principle, I think.

-----Original Message-----
From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On
Behalf Of Timothy Blackwood
Sent: Saturday, January 01, 2022 10:05 AM
To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
Subject: Re: [Rockhounds] 0.76 meter-long Arthropleura fossil found on
Northumberland beach

Actually, insects do have hearts. But oxygen enters their bodies through
openings in the sides of their bodies...and that oxygen enters the "blood"
by diffusion.

Tim


Timothy J. Blackwood
E-mail: Tim_Blackwood1 at hotmail.com<mailto:Tim_Blackwood1 at hotmail.com>
Phone: (218) 999-0603
Home Address:
120 NW 5th Street Apartment 101
Cohasset, Minnesota, USA 55721

________________________________
From: Rockhounds <rockhounds-bounces at rockhounds.drizzle.com> on behalf of J
Bryan Kramer <codeburner at gmail.com>
Sent: Saturday, January 1, 2022 8:30 AM
To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
<rockhounds at rockhounds.drizzle.com>
Subject: Re: [Rockhounds] 0.76 meter-long Arthropleura fossil found on
Northumberland beach

O2 increased to 35% in the Carboniferous which may explain the large size.
As I understand it arthropods size is limited by O2 transfer since they do
not have a lungs-heart system.

BK

""There exists a law...inborn of our hearts...by natural intuition. ... If
our lives are endangered by plots or violence or armed robbers or enemies,
any and every method of protecting ourselves is morally right.""
Cicero

J Bryan Krämer       North Florida, USA
photos at: http://pbase.com/photoburner


On Fri, Dec 31, 2021 at 9:58 PM Paul <etchplain at att.net> wrote:

> Largest-ever millipede fossil found on Northumberland beach By Jonah
> Fisher, BBC, December 21, 2021
> https://www.bbc.com/news/science-environment-59734747
>
> Scientists find fossil of largest arthropod to ever live, a car-size
> millipede Harry Baker, Live Science, December 21, 2021
> https://www.livescience.com/giant-ancient-millipedes-uk
>
> Giant millipede fossil discovered in England reveals 'the biggest bug
> that ever lived' l ABC7, December 30, 2021
> https://www.youtube.com/watch?v=Ku-PG-7yLic
>
> The open access paper is:
>
> Davies, N.S., Garwood, R.J., McMahon, W.J., Schneider, J.W. and
> Shillito, A.P., 2021. The largest arthropod in Earth history: insights
> from newly discovered Arthropleura remains (Serpukhovian Stainmore
> Formation, Northumberland, England). Journal of the Geological
> Society.
> Abstract:
> https://jgs.lyellcollection.org/content/early/2021/11/19/jgs2021-115
> PDF:
>
> https://jgs.lyellcollection.org/content/jgs/early/2021/11/19/jgs2021-1
> 15.full.pdf
>
> Yours,
>
> Paul H.
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