Family Stomylotrematidae Poche, 1926

Stomylotrema Looss, 1900

Stomylotrema vicarium Braun, 1901

Natural host: Larus dominicanus Lichtenstein.

Experimental hosts: Gallus gallus domesticus (L.), Vanellus chilensis (Molina) . Site of infection: intestine, cloaca.

Locality: Buenos Aires Province.

Life history: Hi1: Probably Pomacea canaliculata (Lamark) . Hi2: larvae of Megadytes glaucus (Brullé)

from Buenos Aires Province; metacercariae encysted in visceral cavity. References: Szidat (1964), Ostrowski de Núñez (1978).

Stomylotrema sp.

Natural hosts: Plegadis chihi (Vieillot), Agelaius thilius petersii (Laubmann) . Site of infection: not reported.

Locality: Buenos Aires Province.

Life history: Hi2: adults of Belostoma elegans (Mayr) and B. oxyurum (Dufour) from Buenos Aires Province and B. foveolatum (Mayr) from Misiones Province; metacercariae encysted in body cavity.

Material deposited: MLP, 4812–4826.

Reference: Digiani (2002).

Comments: Digiani (2002) report the presence of excysted metacercariae in the intestine of Rhamdia

sapo (Valenciennes) (MLP, 4827).