First record of predation of Helicops leopardinus (Squamata: Dipsadidae) by a pitviper Bothrops gr. atrox (Squamata: Viperidae) in the Parnaíba River Delta, Piauí, Northeastern Brazil. Somma: Revista Científica do Instituto Federal do Piauí, v. 12, p. 1–6 (e031226), 17 mar.2026.