cryptocotyle cryptocotyle cryptocotyle is a genus of trematodes from the family heterophyidae. the definitive hosts of the parasites are fish-eating birds and mammals. cryptocotyle the metacercariae, encysted in the fins of the round goby scientific classification kingdom: animalia phylum: platyhelminthes class: trematoda subclass: digenea order: opisthorchiida suborder: opisthorchiata superfamily: opisthorchioidea family: heterophyidae genus: cryptocotylelühe, 1899 synonyms tocotrema looss, 1899 species cryptocotyle americana ciurea, 1924 cryptocotyle badamshini (kurochkin, 1959) cryptocotyle concava (creplin, 1825) cryptocotyle cryptocotyloides (issaitschikow, 1923) cryptocotyle delamurei (jurachno, 1987) cryptocotyle jejuna (nicoll, 1907) cryptocotyle lingua (creplin, 1825) cryptocotyle macrorhinis (maccallum, 1916) sources wikimedia commons has media related to cryptocotyle. "cryptocotyle". worms. world register of marine species.