Published as part of Nogueira, Cristiano C., Argôlo, Antonio J. S., Arzamendia, Vanesa, Azevedo, Josué A., Barbo, Fausto E., Bérnils, Renato S., Bolochio, Bruna E., Borges-Martins, Marcio, Brasil-Godinho, Marcela, Braz, Henrique, Buononato, Marcus A., Cisneros-Heredia, Diego F., Colli, Guarino R., Costa, Henrique C., Franco, Francisco L., Giraudo, Alejandro, Gonzalez, Rodrigo C., Guedes, Thaís, Hoogmoed, Marinus S., Marques, Otavio A. V., Montingelli, Giovanna G., Passos, Paulo, Prudente, Ana L. C., Rivas, Gilson A., Sanchez, Paola M., Serrano, Filipe C., Silva Jr., Nelson J., Strüssmann, Christine, Vieira-Alencar, João Paulo S., Zaher, Hussam, Sawaya, Ricardo J. & Martins, Marcio, 2019, Atlas of Brazilian Snakes: Verified Point-Locality Maps to Mitigate the Wallacean Shortfall in a Megadiverse Snake Fauna, pp. 1-274 in South American Journal of Herpetology 14 (s 1) on page 35, DOI: 10.2994/SAJH-D-19-00120.1, http://zenodo.org/record/10061686

Hydrops caesurus Scrocchi et al., 2005 Type locality. “Isla Paloma, Canal de los Jesuitas, Rio Paraná, Itapúa, Paraguay.” Distribution. Known from Argentina, Brazil, and Paraguay, along the Paraguay River drainage (Plt. 290A). In Brazil,recorded in the Pantanal and Cerrado (Plt. 290A) at low elevations (Plt. 290B). Observed in the field in rivers and seasonally flooded areas (Scrocchi et al., 2005; Duleba et al., 2015).