Ophryocotyle proteus Friis 1870

are endoparasites of

• World Register of Marine Species: Charadrius hiaticula Linnaeus 1758 (Common ringed plover) (adult)
• World Register of Marine Species: Calidris alpina (Linnaeus 1758) (Dunlin) (adult)
• World Register of Marine Species: Larus canus Linnaeus 1758 (Mew gull) (adult)

body length

• MADtraits: 0.155 mm (single measurement)
• MADtraits: 15.5 mm (single measurement)
• MADtraits: 0.17 mm (max)
• MADtraits: 25 mm (max)
• MADtraits: 0.02 mm (single measurement)

body shape

• MADtraits: lathlike
• MADtraits: sphere

body width

• MADtraits: 0.62 mm (max)
• MADtraits: 0.1 mm (single measurement)
• MADtraits: 0.11 mm (max)
• MADtraits: 0.6 mm (single measurement)

geographic distribution

• United States Species List: United States
• Sweden Species List: Sweden
• New Zealand Species List: New Zealand
• World Register of Marine Species: Spanish Exclusive Economic Zone
• World Register of Marine Species: European waters (ERMS scope)

number of hosts

• MADtraits: 2
• MADtraits: 1

trophic guild

• MADtraits: parasite
• MADtraits: parasite
• World Register of Marine Species: endoparasite
• World Register of Marine Species: endoparasite
• World Register of Marine Species: endoparasite