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Moraes-da-Silva, A.; Amaro, R.C.; Sales Nunes, P.M.; Rodrigues, M.T.; Curcio, F.F.
2021
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 4903(2): 217-241.