Figure 1From: Alkaloids from single skins of the Argentinian toad Melanophryniscus rubriventris (ANURA, BUFONIDAE): An unexpected variability in alkaloid profiles and a profusion of new structuresPhotographs showing the bright coloration and patterns typical of M. rubriventris toads in Argentina. Specimens are from: a) Huaico Chico, Salta (skins #3, 4); b) Tablada, Jujuy (skins #5, 6); c) Abra Colorada and d) Tiraxi (see Figure 2).Back to article page