Marinkelle CJ. Notes on Colombian Opalinids. I. <i>Opalina</i>, <i>Zelleriella</i>, and <i>Cepedea</i>. Rev. Biol. Trop. [Internet]. 1965Dec.1 [cited 2024Nov.30];13(2):203–206. Available from: https://revistas.ucr.ac.cr/index.php/rbt/article/view/28632