The current young morphologist has a background in cellular and molecular biology, where the production of knowledge is very intense and rapid. However, as demonstrated in this review, quantitative methods in morphology, especially allometry, may be significant in demonstrating relationships between size and shape, ontogeny, and phylogeny. These themes are essential to the morphologist and should not be neglected because it improves the morphologists capacity for criticism and proposing projects. In this text, both ontogenetic and phylogenetic allometries in bivariate and multivariate studies are commented. Therefore, it is an initial text for those who have not yet been introduced to the topic, which gives the basis for being increased in the future, with more specific literature.
KEY WORDS: Scaling; Evolution; Slope; Growth; Principal components analysis.