[1]
Marinkelle, C.J. 1965. Notes on Colombian Opalinids. I. <i>Opalina</i>, <i>Zelleriella</i>, and <i>Cepedea</i>. Revista de Biología Tropical. 13, 2 (Dec. 1965), 203–206. DOI:https://doi.org/10.15517/rev.biol.trop.1965.28632.