A new parrotfish (Scaridae) from Brazil, and revalidation of Sparisoma amplum (Hanzani, 1842), Sparisoma frondosum (Agassiz, 1831) Sparisoma axillare (Steindachner, 1878) and Scarus trispinosus (Valenciennes, 1840) - Moura, Rodrigo Leão de; Figueiredo, José Lima de; Sazima, Ivan (Bulletin of Marine Science, 2001)