Microphotographs of metacercariae (live) of the families Echinochasmidae (A), Echinostomatidae (B–D), Heterophyidae (E–I) and Opisthorchiidae (J–L). (A) Echinochasmus sp. 1, encysted ex Perca fluviatilis (voucher, PX600352); (B) Echinoparyphium sp. 2, encysted metacercaria ex Cobitis taenia; (C) Petasiger phalacrocoracis, encysted metacercaria ex Tinca tinca (voucher, FP1121, see Table S2); (D) Petasiger radiatus, encysted metacercaria ex Carassius gibelio (voucher, PX600354); (E) Apophallus donicus, encysted metacercaria ex Esox lucius (voucher, FP651, see Table S2); (F) Apophallus muehlingi, encysted metacercaria ex Blicca bjoerkna (voucher, PX552785); (G) Apophallus muehlingi, encysted metacercaria ex Scardinius erythrophthalmus (voucher, PX552787); (H) Apophallus sp., encysted metacercaria ex S. erythrophthalmus (voucher, PX552801); (I) Apophallus sp., excysted metacercaria ex Tinca tinca (voucher, PX552804); (J) Metorchis bilis, encysted metacercaria ex Leuciscus idus (voucher, PX552805); (K) Metorchis sp. 2, encysted metacercaria ex T. tinca (voucher, FP1206, see Table S2); (L) Metorchis sp. 2, excysted metacercaria ex Rutilus rutilus (voucher, PX552808).