Family Microphallidae (Ward, 1901) Travassos, 1920

Levinseniella Stiles & Hassall, 1901

Levinseniella cruzi Travassos, 1920

Hosts: Rollandia rolland chilensis (Lesson), Himantopus melanurus Vieillot, Vanellus chilensis lam­

pronotus (Wagler).

Site of infection: ceca.

Localities: Los Talas; Chascomús lagoon and Mar Chiquita coastal lagoon, Buenos Aires Province. Life history: Hi1: Heleobia conexa (Gaillard), H. parchappei (d’Orbigny) (natural hosts). Hi2: Palaemonetes argentinus Nobili (experimental and natural host); metacercariae in muscles, gonads, connective tissue.

Material deposited: MLP, 3303C–3306C, USNPC 84905–84908. References: Martorelli (1988), Martorelli & Schuldt (1990), Martorelli & Ivanov (1996).

Levinseniella (Monarrhenos) anenteron (Szidat, 1964) Deblock, 1978 Syn.: Austromicrophallus anenteron Szidat, 1964 .

Hosts: Larus dominicanus Lichtenstein, L. maculipennis Lichtenstein. Site of infection: intestine.

Localities: San Carlos de Bariloche and Nahuel Huapí Lake, Río Negro Province; Huechulaufquen Lake,

Lanín National Park, Neuquén Province.

Reference: Szidat (1964).

Maritrema Nicoll, 1907

Maritrema bonaerensis Etchegoin & Martorelli, 1997 Hosts: Larus maculipennis Lichtenstein, L. dominicanus Lichtenstein, L. atlanticus Olrog. Site of infection: intestine.

Localities: Mar Chiquita coastal lagoon and Orense beach, Buenos Aires Province.

Life history: Hi1: Heleobia australis australis (d'Orbigny) (natural host). Hi2: Cyrtograpsus angulatus Dana (natural and experimental host), Chasmagnathus granulata Dana. (natural host); metacercariae in hepatopancreas.

Material deposited: MLP, 3661a–b, 4583; USNPC, 87019, 87020.

References: Etchegoin & Martorelli (1997a), Cremonte et al. (1999).

Maritrema orensensis Cremonte & Martorelli, 1998

Host: Larus dominicanus Lichtenstein.

Site of infection: intestine.

Locality: Orense beach, Buenos Aires Province.

Material deposited: MLP, 3955–3956; IPCAS, D­405.

Reference: Cremonte & Martorelli (1998).

Microphallus Ward, 1901

Microphallus simillimus (Travassos, 1920) Martorelli, 1991

Host: Himantopus melanurus Vieillot.

Site of infection: intestine.

Locality: Mar Chiquita coastal lagoon, Buenos Aires Province. Life history: Hi1: Heleobia conexa (Gaillard) (natural host); metacercariae in hepatopancreas and gonads. Material deposited: MLP, 3100 D­3102 D

Reference: Martorelli (1991).

Microphallus szidati Martorelli, 1986

Natural hosts: Himantopus melanurus Vieillot, Pardirallus sanguinolentus sanguinolentus (Swainson),

Larus atlanticus Olrog.

Experimental host: Mus musculus L.

Site of infection: intestine, ceca.

Localities: Mar Chiquita coastal lagoon and Los Talas, Buenos Aires Province. Life history: Hi1: Heleobia conexa (Gaillard), H. parchappei (d’Orbigny) (natural hosts). Hi2: Cyrtograpsus angulatus Dana, Chasmagnathus granulata Dana (natural hosts); metacercariae in hepatopancreas; Palaeomonetes argentinus Nobili (natural and experimental host); metacercariae in muscles, gonads and connective tissue.

Material deposited: MLP, adult: 1319 C, metacercariae: 1319 D. References: Martorelli (1986a, 1986b, 1989a), Martorelli & Schuldt (1990), Etchegoin et al. (1996).

Odhneria Travassos, 1921

Odhneria odhneri Travassos, 1921

Hosts: Phalacrocorax brasilianus (Gmelin), Larus dominicanus Lichtenstein. Locality: Fracasso beach, San José Gulf, Chubut Province. Site of infection: intestine.

Material deposited: MLP, 4868.

Reference: Cremonte & Etchegoin (2002).