Microtetrameres sp.

Host: Coryphospingus cucullatus . SI: proventriculus. Lo: La Plata Zoological Garden, Buenos Aires Province. Reference: Boero & Led (1968).

Host: Cyanocorax chrysops . SI: proventriculus. Lo: La Plata Zoological Garden, Buenos Aires Province. Reference: Boero & Led (1968).

Host: Sturnus vulgaris . SI: proventriculus. Lo: Bernal (-34.6956, -58.2667), Buenos Aires Province. Material deposited: MLP–He 6734. Reference: Valente et al. (2014).