Sousa, S.C., Hernández-García, L.M. & Rousseau, G.X. (2020) A new species of Pontoscolex earthworm (Rhinodrilidae, Clitellata) from the Gurupi Biological Reserve, along with records of earthworm species from the Amazon region of Maranhão, Brazil. Zootaxa, 4801 (1), 105–114.