Two new species of myxozoan parasites (Myxosporea, Multivalvulida, Bivalvulida) from fishes of the Falkland Islands

Two new myxozoan species are described from the musculature of fish caught around the Falkland Islands. Kudoa ramsayi sp. n. was round in three of 23 specimens of the marine nototheniid fish Patagonotothen ramsayi (Regan). It s spores differ in size and shape from those of Kudoa alliaria Shulman et K ovaleva, previously reported from the same host. Myxobolus bartoni sp. n. w as found in one of six specimens of the diadromous fish Galaxias maculatus (Jenyns). Although four species of the genus Myxobolus have been reported f rom fish of the genus Galaxias elsewhere, this is the first report of a Myx obolus from G. maculatus in the Falkland Islands. It differs from the other four species in spore morphometrics and internal structure. In addition, w e propose the name Myxobolus olidus nom, nov. to replace M. galaxii Langdon , 1990, which is preoccupied by M. galaxii Szidat, 1953.