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Perkinsus
''Perkinsus'' is a genus of protists in the phylum Perkinsozoa. The genus was erected in 1978 to better treat its type species, ''Perkinsus marinus'', known formerly as ''Dermocystidium marinum''.〔Villalba, A., et al. (2004). (Perkinsosis in molluscs: a review. ) ''Aquatic Living Resources'' 17(04), 411-32.〕 These are parasitic protozoans that infect molluscs, at least some of which cause disease and mass mortality. ''P. marinus'' is the most notorious, causing the disease perkinsosis, or dermo, in wild and farmed oysters.〔Petty, D. (''Perkinsus'' Infections of Bivalve Molluscs. ) FA178. Fisheries and Aquatic Sciences. Florida Cooperative Extension Service. University of Florida IFAS. 2010.〕 As of 2004 there were six valid species in the genus.〔 At least two more have been described since then.〔Moss, J. A., et al. (2008). (Description of ''Perkinsus beihaiensis'' n. sp., a new ''Perkinsus'' sp. parasite in oysters of southern China. ) ''Journal of Eukaryotic Microbiology'' 55(2), 117-30.〕〔Dungan, C. F. and K. S. Reece. (2006). (''In vitro'' propagation of two ''Perkinsus'' spp. parasites from Japanese Manila clams, ''Venerupis philippinarum'', and description of ''Perkinsus honshuensis'' n. sp. ) ''J Eukaryot Microbiol'' 53, 316-26.〕 Species and common hosts include: *''Perkinsus andrewsi'' on Baltic clam (''Macoma balthica'')〔Coss, C. A., et al. (2001). (Description of ''Perkinsus andrewsi'' n. sp. isolated from the Baltic clam (''Macoma balthica'') by characterization of the ribosomal RNA locus, and development of a species-specific PCR-based diagnostic assay. ) ''J Eukaryot Microbiol'' 48(1), 52-61.〕 *''Perkinsus beihaiensis'' on the oysters ''Crassostrea hongkongensis'' and ''C. ariakensis''〔 *''Perkinsus chesapeaki'' on soft-shell clam (''Mya arenaria'')〔McLaughlin, S. M., et al. (2000). (Zoosporulation of a new ''Perkinsus'' species isolated from the gills of the softshell clam ''Mya arenaria''. ) ''Parasite'' 7(2), 115-22.〕 *''Perkinsus honshuensis'' on Manila clam (''Venerupis philippinarum'')〔 *''Perkinsus marinus'' on eastern oyster (''Crassostrea virginica'') *''Perkinsus mediterraneus'' on European flat oyster (''Ostrea edulis'')〔Casas, S. M., et al. (2004). (''Perkinsus mediterraneus'' n. sp., a protistan parasite of the European flat oyster ''Ostrea edulis'' from the Balearic Islands, Mediterranean Sea. ) ''Dis Aquat Organ'' 58(2-3), 231-44.〕 *''Perkinsus olseni'' (syn. ''P. atlanticus'') on blacklip abalone (''Haliotis rubra'') and grooved carpet shell (''Ruditapes decussatus'') *''Perkinsus qugwadii'' on yesso scallop (''Patinopecten yessoensis'') ''P. andrewsi'' and ''P. chesapeaki'' might be the same species; because the latter was described first, the name ''P. andrewsi'' will be a synonym.〔Burreson, E. M., et al. (2005). (Molecular, morphological, and experimental evidence support the synonymy of ''Perkinsus chesapeaki'' and ''Perkinsus andrewsi''. ) ''J Eukaryot Microbiol'' 52(3), 258-70.〕 ==References==
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