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Re: How large insects may have come about
Would that also apply for non-insect giant arthropods? As a layman, a
problem I also had with the oxygen hypothesis as permitting gigantism
(before this toxic oxygen avoidance hypothesis) was that the largest
arthropods today, as in the Paleozoic, were found in the waters, where
oxygen is more diluted.
Water arthropods seem to be larger thanks to their relative weight
being lesser in water, which would save them from gravity problems as
in the the case of mammals, and perhaps because of their more
mineralized exoskeletons compared with terrestrial arthropods, which
seem to provide stouter levers. Many terrestrial crabs are larger than
largest insects, araneans, and chilopods. Did Paleozoic large
arthropods show support enhancements as mineralized, or relatviely
much thicker exoskeletons?