the overlap of these two processes in rapidly developing frog species(Elinson and del Pino 2012) Overlap of gastrulation and body elongation is associated with rapid development in the unstable conditions of the reproductive C. stolzmanni, Aoating foam-nest development in Engystomops , and suspension of eggs on the vegetation, in the case of centrolenids frogs (Table 1),(Elinson and del Pino 2012).The distinct modes of gastrulation likely relate to the reproductive mode of frogs, rather than to phylogenetic relationships