Cryptocotyle

Cryptocotyle is a genus of trematodes from the family Heterophyidae. The definitive hosts of the parasites are fish-eating birds and mammals. The metacercariae are visible in the skin of infected fish as "black spots".^[1]

Cryptocotyle
The metacercariae, encysted in the fins of the round goby
Scientific classification
Kingdom:	Animalia
Phylum:	Platyhelminthes
Class:	Trematoda
Order:	Plagiorchiida
Family:	Heterophyidae
Genus:	Cryptocotyle Lühe, 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)