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The haptophytes, classified either as the Prymnesiophyta (named for ''Prymnesium'') or Haptophyta, are a division of algae. The names Haptophyceae or Prymnesiophyceae are sometimes used instead.〔(【引用サイトリンク】title=ITIS Standard Report )〕 This ending implies classification at the class rank rather than as a division. Although the phylogenetics of this group has become much better understood in recent years, there remains some dispute over which rank is most appropriate. ==Characteristics== The chloroplasts are pigmented similarly to those of the heterokonts,〔R.A. Anderson. American Journal of Botany 91(10): 1508-1522. 2004. (Biology and Systematics of Heterokont and Haptophyte Algae. )〕 but the structure of the rest of the cell is different, so it may be that they are a separate line whose chloroplasts are derived from similar red algal endosymbionts. The cells typically have two slightly unequal flagella, both of which are smooth, and a unique organelle called a ''haptonema'', which is superficially similar to a flagellum but differs in the arrangement of microtubules and in its use. The name comes from the Greek ''hapsis'', touch, and ''nema'', thread. The mitochondria have tubular cristae. 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「haptophyte」の詳細全文を読む スポンサード リンク
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