English: Derived from File:Geographical_distribution_of_chasmataspidid_fossils.png
Geographic distribution of chasmataspidids. Occurrences are shown on paleogeographic reconstructions for the Middle–Late Ordovician, Early–Middle Silurian, and Early–Middle Devonian. Hoplitaspis is indicated by a star while other chasmataspidids are represented by circles. Ba = Baltica, Eu = Euramerica, Go = Gondwana, La = Laurentia, Si = Siberia. Paleogeographic reconstructions
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File:Geographical distribution of chasmataspidid fossils.png
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