Family Acuariidae Seurat, 1913

Ancyracanthopsis Diesing, 1861

Ancyracanthopsis winegardi Wong & Anderson, 1990 Location: under koilin of the Gizzard.

Locality: Balneario Orense, Buenos Aires province (Argentina). Life history: H1: Uca spp.

Reference: Cremonte et al. (2000).

Cosmocephalus Molin, 1858

Cosmocephalus obvelatus (Creplin, 1825)

Syn.: Cosmocephalus tanakai

Other host: Larus californicus Lawrense, Larus audouinii, Payraudeau, Larus marinus (L.).

Location: Oesophagus and under Koilin in gizzard.

Localities: Otago Peninsula, Ranginata Island, Lyttelton Harbour (New Zealand), Chubut Province (Argentina), Brazil (named as C. tanakai by Rodrigues & Vicente, 1963), Talcahuano (Chile).

Life history: H1 amphipods. H2 fish.

References: Rodrigues & Vicente (1963), Bowie (1981), Diaz et al. (2001), Latham & Poulin (2002). Present study.

Paracuaria Krishna Rao, 1951

Paracuaria adunca (Creplin, 1846)

Location: Under Koilin at the junction of the proventriculus and gizzard. Localities: Puerto Madryn, Fracaso Beach (Argentina). References: Diaz et al. (2004).

Pectinospirura Wehr, 1933

Pectinospirura argentata Wehr, 1933

Other Host: L. atlanticus .

Location: Proventriculus.

Localities: Balneario Orense, Mar del Plata and Bahía Blanca coasts Buenos Aires Province (Argentina).

References: Cremonte & Navone (1999), Labriola & Suriano (2001), La Sala et al. (2009).

Sciadiocara Skrjabin, 1916

Sciadiocara haematopodi Cremonte et al., 1999 Location: under koilin in gizzard.

Locality: Balneario Orense, Buenos Aires Province (Argentina). Reference: Cremonte et al. (1999b).

Sciadiocara tarapunga Clark 1978

Other host: L. n. scopulinus .

Location: Under koilin in gizzard.

Locality: Otago Peninsula (New Zealand). Reference: Latham & Poulin (2002).

Skrjabinoclava Sobolev, 1943

Skrjabinoclava sp.

Location: Proventriculus.

Locality: Mar del Plata (Argentina).

Reference: Labriola & Suriano (2001).

Skrjabinoclava andersoni Cremonte & Navone, 1999 . Other host: L. atlanticus .

Location: Proventriculus.

Locality: Balneario Orense and Bahia Blanca, Buenos Aires Province (Argentina). Reference: Cremonte & Navone (1999), La Sala et al. (2009).