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Moraes-da-Silva, A.; Walterman, S.; Citelic, N.; Nunes, P.M.S.; Curcio, F.F.
2021
A new oviparous species of Helicops Wagler, 1828 (Serpentes, Xenodontinae) from Brazilian Amazonia with reflections on the evolution of viviparity among hydropsine watersnakes.
Zoologischer Anzeiger 296: 91-109.