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†Psephaspis Orvig 1961
urn:lsid:organismnames.com:name:521849
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vLDvixiv
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†Psephaspis Orvig 1961
Orvig 1961. Notes on some early representatives of the Drepanaspida (Pteraspidomorphi, Heterostraci). Arkiv for Zoologi, 12 1961: 515-535