Christoffersen, Martin L. 2007. “Clitellate Evolution and Leech Diversity: Glossiphoniidae Excl. Helobdella (Annelida: Hirudinea: Rhynchobdellida) from South America”. Gaia Scientia 1 (2). https://periodicos.ufpb.br/ojs2/index.php/gaia/article/view/2269.