“…The latter condition is usually present in adults of some species, as seen in M. poecilus Eigenmann, 1912, M. iheringi Gomes, 1946(Mees, 1974, M. pellopterygius Mees, 1978(Mees, 1978, M. robustus Ruiz & Shibatta, 2010(Ruiz & Shibatta, 2010, M. xylographicus Ruiz & Shibatta, 2011, M. oliveirai Ruiz & Shibatta, 2011(Ruiz & Shibatta, 2011, M. lundbergi (Jarduli & Shibatta, 2013), and M. leniceae. As noted in juvenile of M. maculatus Shibatta, 2014(Shibatta, 2014, the hooks of the anterior margin of the pectoral fin spine are retrorse in the beginning with addition of antrorses hooks throughout the development. In M. leniceae the development is similar, but among antrorses and retrorses hooks, there is a bifurcated hook, which is formed after the development of 8 to 9 proximal retrorse hooks.…”