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Lehnert, H. (1993). Die Schwämme von Cozumel (Mexiko). Bestandsaufnahme, kritischer Vergleich taxonomischer Merkmale, und Beschreibung einer neuen Art (The sponges from Cozumel (Mexico). Inventory, critical comparison of taxonomic characters and description of a new species. Acta Biolologica Benrodis. 5: 35-127 (in German, with abstracts in German and English).