Contracaecum pelagicum

(Johnston & Mawson, 1942)

Host: Eudyptes chrysocome (cited as E. crestatus). SI: intestine. Lo: not reported. Reference: Boero et al. (1972b). Comment: cited as Contracaecum spheniscus Boero & Led, 1970 .

Host: Spheniscus magellanicus 1, 2, 3. SI: intestine 1, stomach 2, 3. Lo: not reported 1, Península Valdés (-42.06667 to -42.8833, -63.63 to -64.5), Chubut Province 2, 3; and Mar del Plata (-38.0833, -57.6333), Buenos Aires Province 2. Material deposited: MLP–He 55912, 3. References: Boero et al. (1972b) 1; Garbin et al. (2007) 2; Díaz et al. (2010) 3. Comment: cited as C. spheniscus by Boero et al. (1972b).

Host: Thalassarche melanophris (cited as Diomedea m.). SI: stomach. Lo: Península Valdés (-42.0667 to -42.88333, -63.633 to -64.50), Chubut Province. Material deposited: MLP–He 5591. Reference: Garbin et al. (2007).

Comment: Contracaecum spheniscus was described in the proceedings of a congress in 1970, based only on male specimen found in the proventriculus of S. magellanicus from the La Plata Zoological Garden. Boero et al. (1972b) considered it valid, and reported males and females parasitizing penguins. Finally, Garbin et al. (2019a) synonimized C. spheniscus with C. pelagicum .