Fig. 2

Gut contents in ceratophryid tadpoles. a. Food content in the foregut of the small tadpole (Stage 37) of Chacophrys pierottii, the presence of small particles of detritus and macerated shrimp are observed. b. Ventral view of the coiled gut in a large tadpole of Ch. pierottii (Stage 37). Shrimps are observed by transparency. c. Detail of the macerated shrimp, pieces of wood and filamentous of algae in the gut of the specimen shown in b. d. Gut content in a tadpole of C. cranwelli (Stage 37), in which pieces of tadpoles are predominant. e. Diet during larval stages in Lepidobatrachus llanensis and L. laevis. Stomachs are full of food at all larval stages in both species. Furthermore, the whole alimentary tracts contain digested organic matter. Crustaceans and tadpoles are frequent. Occasionally, tadpoles of these species may eat insects and snails