TY - JOUR T1 - Systematics and biogeography of the genus Phalloceros Eigenmann, 1907 (Cyprinodontiformes: Poeciliidae: Poeciliinae), with the description of twenty-one new species JO - Neotropical Ichthyology A1 - Lucinda, Paulo Henrique Franco SN - 1679-6225 UL - 10.1590/S1679-62252008000200001 VL - 6 Y1 - 2008 PB - Brasil ER -