FIGURE 23 in A review of Northern Peruvian glassfrogs (Centrolenidae), with the description of four new remarkable species

FIGURE 23. Variation in the distribution iridophores on the pericardium in Hyalinobatrachium. a) H. carlesvilai from Puente Chino, Ucayali, Peru (voucher MHNC 13958). This individual was sequenced and is included in our phylogenetic analysis. b) A recently collected topotypic specimen of H. esmeralda, Boyaca Colombia (courtesy of M. A. Rada); note pigmentation on the dorsal surface of the pericardium. In the original description of H. esmeralda, the pericardium was described as transparent (Ruiz-Carranza & Lynch 1998, pg. 580). However, in figure 4C of the same paper, a female is shown with a white pericardium. In addition, partial pigmentation of the pericardium has been observed in a paratype (M. A. Rada pers comm.). c) Three males of H. fleischmanni from a stream near San Gabriel Mixtepec, Oaxaca, Mexico. Adults exhibited variation in the condition of the pericardium within this population. Considering the variation observed in these three species, this character state appears to be variable in several species.