Aspe, Nonillon M., and Samuel W. James. “New Species of Pheretima (Oligochaeta: Megascolecidae) from the Mt. Malindang Range, Mindanao Island, Philippines”. Zootaxa 3881, no. 5 (November 7, 2014): 401–439. Accessed April 30, 2025. https://mapress.com/zt/article/view/zootaxa.3881.5.1.