Echinuria cygni Morini, Colombo & Martin, 1959

Host: Cygnus melancoryphus . SI: proventriculus 2. Lo: Buenos Aires Zoological Garden, Buenos Aires city 1; La Plata Zoological Garden, Buenos Aires Province 2. References: Rodríguez & Boero (1964) 1; Boero & Led (1968) 2. Comment: the females of this species were originally described by Morini, Colombo & Martín in the proceedings of a meeting “ Actas y Trabajos del primer congreso Sudamericano de Zoología ” in 1959. Rodríguez & Boero (1964) and Boero & Led (1968) consider it a valid species, and described the males.