Cosmocephalus obvelatus (Creplin, 1825)

Host: Larus dominicanus . SI: esophagus. Lo: Chubut Province. Material deposited: MLP–He 4811-1 (cited as 4811) and CNP–Par 17. Reference: Díaz et al. (2011a).

Host: Spheniscus magellanicus . SI: esophagus. Lo: Península (-42.0667 to -42.8833, -63.633 to -64.5), Chubut Province. Material deposited: MLP–He 4811. References: Díaz et al. (2001, 2010).