Eurypterids - Paleozoic 'sea scorpions' that could grow several meters long - were thought to have been aquatic. Computer tomography reveals that respiratory organs of a new fossil eurypterid resemble arachnid book lungs, supporting the hypothesis that eurypterids - and perhaps arachnid ancestors - were amphibious.
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| http://dx.doi.org/10.1016/j.cub.2020.09.052 | DOI Listing |
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