Template:Mortensen, 1920

• Mortensen, O.T.J. 1920. Notes on some Scandinavian Echinoderms with descriptions of two new Ophiuroids. Videnskabelige Meddelelser fra den Naturhistoriske Forening i Kjøbenhavn. 72: 45–79. BHL.  
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Nomenclatural acts

• Date of publication: 05 June 1920

New names (3)

• Amphiura griegi
• Ophiactis nidarosiensis
• Ophiocomina Koehler