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IRMNG taxon detailsGeissonaspis Thorsteinsson & Elliott, 2022 †
marine
fossil only
Thorsteinsson, R.; Elliott, D.K. (2022). Silurian and Devonian Heterostraci (Vertebrata) of the Canadian Arctic Archipelago. <em>Palaeontographica Canadiana.</em> 40., available online at https://gac.ca/wp-content/uploads/2022/12/PalCan40-ToC.pdf [details]
IRMNG (2026). Geissonaspis Thorsteinsson & Elliott, 2022 †. Accessed at: https://irmng.org/aphia.php?p=taxdetails&id=11954724 on 2026-04-25
original description
Thorsteinsson, R.; Elliott, D.K. (2022). Silurian and Devonian Heterostraci (Vertebrata) of the Canadian Arctic Archipelago. <em>Palaeontographica Canadiana.</em> 40., available online at https://gac.ca/wp-content/uploads/2022/12/PalCan40-ToC.pdf [details]
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