1. 
   Opalina
   A genus of parasitic protozoans found in the guts of frogs and toads. They look superficially like ciliates, but are classified in a separate group as they have a number of similar nuclei.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   Opalina
   <protozoa> A genus of parasitic protozoans found in the guts of frogs and toads. They look superficially like ciliates, but are classified in a separate group as they have a number of similar nuclei. ... (18 Nov 1997) ...
   Found op http://www.mondofacto.com/facts/dictionary?Opalina
   
   
3. 
   Opalina
   Opalina (so named by J. E. Purkinje and G. Valentin), is a genus of Protozoa found in the intestines of frogs and toads. It is without a mouth or contractile vacuole, covered with nearly equal flagelliform cilia, and possessing numerous nuclei, all similar. All the species are obligate endosymbiont...
   Found op http://en.wikipedia.org/wiki/Opalina
   
   
4. 
   Opalina
   Opalina is a member of the order of Holotricha.
   Found op http://www.probertencyclopaedia.com/browse/BO.HTM
   
   
5. 
   opalina
   1) Member of the order of holotricha
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/opalina/1
   
   

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