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†Borealaspis Ludvigsen 1976
urn:lsid:organismnames.com:name:2235585
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†Borealaspis Ludvigsen 1976
Ludvigsen 1976. New cheirurinid trilobites from the Lower Whittaker Formation (Ordovician), southern Mackenzie Mountains. Canadian J Sci, 13(7) 1976: 947-959,2