First report of Pseudochauhanea mexicana (Mazocraeidea, Chauhaneidae) and Scomberocotyle scomberomori (Mazocraeidea, Thoracocotylidae) in Sphyraena ensis (Perciformes, Sphyraenidae) from the northern Peru

Sphyraena ensis is distributed in the Eastern Pacific from Mexico to Chile, including Galapagos Islands. Despite wide distribution of this fish, knowledge parasitic fauna S. restricted only three monogenean species. The objective study was record and describe two species northern Peru. During a parasitological May October 2019, monogeneans were collected gills 138 specimens Caleta de Zorritos, Contralmirante Villar Province, Tumbes, on north coast Helminths stained carmine acetic acid, dehydrated ethyl alcohol, diaphanized clove oil mounted Canada balsam. To observe sclerotized structures, several placed Hoyer’s medium. We identified following not previously reported Peru: Pseudochauhanea mexicana Scomberocotyle scomberomori. This first report these Peru, P. South America. Furthermore, as new host