MORAES-DA-SILVA, A.; AMARO, R. C.; NUNES, P. M. S.; RODRIGUES, M. T.; CURCIO, F. F. Long known, brand new, and possibly threatened: a new species of watersnake of the genus Helicops Wagler, 1828 (Serpentes; Xenodontinae) from the Tocantins-Araguaia River Basin, Brazil. Zootaxa, Auckland, New Zealand, v. 4903, n. 2, p. 217–241, 2021. DOI: 10.11646/zootaxa.4903.2.3. Disponível em: https://www.mapress.com/zt/article/view/zootaxa.4903.2.3. Acesso em: 2 may. 2025.