Filaria is a genus of nematodes belonging to the family Filariidae. The genus has cosmopolitan distribution. Species: * Molin, 1858 * Molin, 1858 * Delle Chiaje, 1829 * Gmelin, 1791 * Rudolphi, 1809 * Sambon, 1907 * Diesing, 1851 * von Linstow, 1877 * Railliet, 1893 * Leuckart, 1892 * Leuckart, 1892 * Manson, 1893