Colour in preservative of dorsum of Scinax onca sp. n. Dorsal colour variation of preserved specimens of Scinax onca sp. n. Specimens from middle (A−C) and southern (D−F) Purus-Madeira Interfluve, Brazilian Amazonia. AINPA-H 34581, male, SVL 34.3 mm BINPA-H 34583, female, SVL 35.5 mm CINPA-H 34582 male, SVL 31.5 mm DINPA-H 34594, male, SVL 32.6 mm EINPA-H 34589, female, SVL 38.9 mm FINPA-H 34593, male, SVL 34.5 mm.