Metacercariae Of Trematoda In Fish Musculature From Latvian Water Bodies Author Kirjušina, Muza Corresponding author: Muza Kirjušina. Daugavpils University, Par ‚ des Str. 1 A, Daugavpils, LV- 5401, Latvia, E-mail: muza. kirjusina @ du. lv Author Bricis, Reinis Author ne, Inese Gavara text Acta Biologica Universitatis Daugavpiliensis 2022 22 2 189 193 journal article 10.5281/zenodo.12650020 1407-8953 12650020 Posthodiplostomum cuticola (Nordmann, 1832) Dubois, 1936 For the first time parasite has been reported by Shulman in 1949 as syn. Neascus cuticola (Nordmann, 1832) . P. cuticola is widespread pathogenic fish parasite was detected in lakes, rivers and carps ponds for 13 fish species: bream, white bream, bleak, roach, rudd, crucian carp, carp ( Cyprinus carpio ) , wild carp ( Cyprinus carpio haematopterus ), vimba, ruffe, chub, ide, and perch. Prevalence of invasion grows up to 100% in some lakes. In heavy invasion cases parasite occurred in muscle under fish skin. P. cuticola metacercaria was only sporadically found in bream, white bream, vimba, and rudd, in the upper layers of the muscles. Gastropods Planorbis planorbis , P. carinatus serve as first intermediate hosts. Definitive hosts of parasite are heron Ardeidae family birds ( Niewiadomska 2003 ).