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†Cyrtometopella Nikolaisen 1961
urn:lsid:organismnames.com:name:2339488
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†Cyrtometopella Nikolaisen 1961
Nikolaisen 1961. The Middle Ordovician of the Oslo region, Norway. 7. Trilobites of the suborder Cheirurina. Norsk Geologisk Tidsskrift, 41(2-4) 1961: 279-309