Strueder-Kypke, Michaela C., Andre-Denis, G. Wright, Foissner, Wilhelm, Chatzinotas, Antonis, and Lynn, Denis H. 2006. "
Molecular Phylogeny of Litostome Ciliates (Ciliophora, Litostomatea) with Emphasis on Free-Living Haptorian Genera."
Protist. 157:261–278.