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Achromatorida is an order of non-pigmented intraerythrocytic parasitic protozoa belonging to the subclass Haemosporidiasina. The order was created by Jacques Euzéby in 1988.〔Euzéby, J. (1988) Comparative Medical Protozoology, Vol. 3: Apicomplexa, 2: Haemosporidioses, Part 1: Plasmodiids, Haemoproteids, "Piroplasms" (general characters)〕 The taxonomy of these organisms has been one of some controversy. Weylon in 1926 grouped many of these genera into the genus ''Babesia'' - given what is now known about these genera this was probably an error. Agreement on the organisation of these genera probably cannot be regarded as being settled. ==Description== These are minute rounded or pyriform parasites found within erythrocytes, or other circulating or endothelial cells of vertebrates. The parasites reproduce by merogony without oocysts or spores. The apical complex has a polar ring and rhopteries. A conoid is lacking and most species lack the associated pellicular microtubules. Flagellae are lacking. The trophozoite stage is separated from erythrocyte by single membrane (in the other groups there usually 2 or more). Vectors include ticks and leeches. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Achromatorida」の詳細全文を読む スポンサード リンク
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