1. The azygiidae, hirudinellidae, ptychogonimidae, sclerodistomidae and syncoeliidae of fishes from the north-east Atlantic;Gibson;Bull. Br. Mus. Nat. Hist. Zool.,1977
2. Family Syncoeliidae Looss, 1899;Gibson,2002
3. The Hemiuroidea: terminology, systematics and evolution;Gibson;Bull. Br. Mus. Nat. Hist. Zool.,1979
4. FAO Species Catalogue;Compagno,1984
5. www.shark-references.com; https://shark-references.com/species/host-parasites-list;Pollerspöck,2023