Holorchis pycnoporus Stossich 1901

are endoparasites of

• World Register of Marine Species: Diplodus sargus (Linnaeus 1758) (White seabream)
• World Register of Marine Species: Pagellus erythrinus (Linnaeus 1758) (緋小鯛)
• World Register of Marine Species: Lithognathus mormyrus (Linnaeus 1758) (Sand Steenbras)
• World Register of Marine Species: Diplodus vulgaris (Geoffroy Saint-Hilaire 1817) (項帶重牙鯛)
• World Register of Marine Species: Symphodus roissali (Risso 1810) (罗氏扁隆头鱼)

geographic distribution

• World Register of Marine Species: Western Saharan part of the North Atlantic Ocean
• World Register of Marine Species: Agulhas Bank
• World Register of Marine Species: French part of the Mediterranean Sea - Western Basin
• World Register of Marine Species: Adriatic Sea
• World Register of Marine Species: French part of the Mediterranean Sea - Western Basin

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