“…A good taxonomic approach also requires knowledge of the early phases of life cycles of species, particularly those that show complex life cycles involving metamorphosis. Furthermore, such knowledge allows several studies such as ecological, physiological, biogeographic, amongst others (Negreiros-Fransozo et al, 2002;Anger, 2003;Marques et al, 2003;Figueiredo et al, 2008;Vergamini & Mantelatto, 2008;Sotelo et al, 2009;González-Gordillo et al, 2010;Demain et al, 2011;Ragionieri & Schubart, 2013;Bolla Jr et al, 2014). Shen (1935) published the pioneer and detailed description of juvenile development in a brachyuran representative (the portunid Carcinus maenas (Linnaeus, 1758)), described up to the ninth juvenile stage.…”