Heterocronía y variación morfológica en anuros

heterochrony is a concept referred to ontogenetic variation and is frequently used in comparative morphology. it involves single traits, the whole organism, size, shape and has implicit the timing in which an ontogenetic trajectory occurs. the study of heterochrony has produced terms, definitions and models in which sometimes the heterochronic variation overlaps with its morphological results and evolutionary processes. herein, the revision of some of these terms and definitions is discussed with data of developmental variation in anurans.