[Davisia amoena sp. n. (Myxosporidia, Sinuolineidae), a parasite of plaice in the northwestern Atlantic].

Davisia amoena sp. n. has been recorded from Hippoglossoides platessoides from northwestern Atlantic (in 36% of fishes). It differs from closely related D. longibrachia in the structure of vegetative forms, a smaller size of polar capsules and longer (1.5 times) lateral appendages. D. newfoundlandia Yoshino a. Noble, 1973 firstly recorded from Coryphaenoides holotrachys in the region of Falkland Islands (in 4.5% of fishes) is redescribed.