Abstract
Snappers of the family Lutjanidae contain several of the most important reef-fishery species in the tropical western Atlantic. Despite their importance, substantial gaps exist for both systematic and ecological information, especially for the southwestern Atlantic. Recent collecting efforts along the coast of Brazil have resulted in the discovery of many new reef-fish species, including commercially important parrotfishes (Scaridae) and grunts (Haemulidae). Based on field collecting, museum specimens, and literature records, we describe a new species of snapper, Lutjanus alexandrei, which is apparently endemic to the Brazilian coast. The newly settled and early juvenile life stages are also described. This species is common in many Brazilian reef and coastal estuarine systems where it has been often misidentified as the gray snapper, Lutjanus griseus, or the schoolmaster, L. apodus. Identification of the new species cast doubt on prior distributional assumptions about the southern ranges of L. griseus and L. apodus, and subsequent field and museum work confirmed that those species are not reliably recorded in Brazil. The taxonomic status of two Brazilian species previously referred to Lutjanus, Bodianus aya and Genyoroge canina, is reviewed to determine the number of valid Lutjanus species occurring in Brazil. Twelve species of Lutjanus are now recognized in the western Atlantic, eight of which occur in Brazil (one endemic). A key for the identification of all western Atlantic Lutjanus species and their known distributional ranges is also provided.
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