Saemundssonia (Saemundssonia) lari (Fabricius & O. 1780)

are ectoparasites of

• Global Biotic Interactions: Chroicocephalus ridibundus (Linnaeus 1766) (Black-headed Gull)
• Global Biotic Interactions: Larus hyperboreus Gunnerus 1767 (Glaucous Gull)
• Global Biotic Interactions: Pagophila eburnea (Phipps 1774) (Ivory Gull)
• Global Biotic Interactions: Arenaria interpres (Linnaeus 1758) (Ruddy Turnstone)
• Global Biotic Interactions: Larus atricilla Linnaeus 1758 (laughing gull)

are parasitized by

• Global Biotic Interactions: Dibrachys fuscicornis (Walker 1836)

have host

• Global Biotic Interactions: Larus dominicanus Lichtenstein & Mhk 1823 (Kelp Gull)
• Global Biotic Interactions: Larus belcheri Vigors 1829 (Belcher's Gull)
• Global Biotic Interactions: Larus fuscus Linnaeus 1758 (Lesser Black-backed Gull)
• Global Biotic Interactions: Larus argentatus Pontoppidan 1763 (European Herring Gull)
• Global Biotic Interactions: Larus argentatus Pontoppidan 1763 (European Herring Gull)

parasitize

• Global Biotic Interactions: Larus marinus Linnaeus 1758 (Great Black-backed Gull)
• Global Biotic Interactions: Larus smithsonianus Coues 1862 (American Herring Gull)
• Global Biotic Interactions: Pagophila eburnea (Phipps 1774) (Ivory Gull)
• Global Biotic Interactions: Pagophila eburnea (Phipps 1774) (Ivory Gull)
• Global Biotic Interactions: Larus glaucoides Meyer & B 1822 (Iceland Gull)