Proleptus obtusus Dujardin 1845

are endoparasites of

• World Register of Marine Species: Raja Linnaeus 1758 (adult)
• World Register of Marine Species: Scyliorhinus canicula (Linnaeus 1758) (Small-spotted catshark) (adult)
• World Register of Marine Species: Scyliorhinus stellaris (Linnaeus 1758) (Nursehound) (adult)
• World Register of Marine Species: Raja clavata Linnaeus 1758 (Thornback ray) (adult)
• World Register of Marine Species: Haploblepharus edwardsii (Schinz 1822) (埃氏宽斑鲨) (adult)

geographic distribution

• World Register of Marine Species: South African part of the Indian Ocean
• World Register of Marine Species: Mediterranean Sea
• World Register of Marine Species: Iberian Atlantic
• World Register of Marine Species: Peruvian Exclusive Economic Zone
• World Register of Marine Species: De Panne

trophic guild

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