Christoffersen, Martin L. “Species Diversity and Distributions of Microdrile Earthworms (Annelida, Clitellata, Enchytraeidae) from South America”. Zootaxa 2065, no. 1 (April 6, 2009): 51–68. Accessed April 4, 2025. https://mapress.com/zt/article/view/zootaxa.2065.1.3.