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Acta Parasitologica, Vol.46, No. 4, 2001, 250-253
Brickle Paul (1), Kalavati Chaganti (2), MacKenzie Ken (3)* - Two new species of myxozoan parasites (Myxosporea, Bivalvulida) from toothfish Dissostichus eleginoides Smitt, 1898 (Pisces, Nototheniidae).

(1) Falkland Islands Government Fisheries Department, P.O. Box 598, Stanley, The Falkland Islands; (2) Department of Zoology, Andhra University, Waltair 530 003, Andhra Pradesh, India; (3) Department of Zoology, The University of Aberdeen, Tillydrone Avenue, Aberdeen AB24 2TZ, U.K.
*Corresponding author: Tel.: +44 1224 272874; Fax: +44 1224 272396;

Two new species of myxozoan are described from the toothfish Dissostichus eleginoides Smitt, 1898, caught on the Falklands-Patagonian Shelf. Ceratomyxa dissostichi sp. nov. was found in the gall bladders of three of 62 toothfish, while Sphaerospora dissostichi sp. nov. was found in the kidneys of four of 205 toothfish. These are the first reports of either myxozoan genus from this host species. The low prevalence of S. dissostichi, together with macroscopic lesions observed in infected kidneys, suggest that this parasite may be a serious pathogen of toothfish.

KEY WORDS: Ceratomyxa dissostichi sp. nov., Sphaerospora dissostichi sp. nov., Myxosporea, toothfish, Dissostichus eleginoides
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