RRC ID 19946
著者 Moriya M, Nakayama T, Inouye I.
タイトル A new class of the stramenopiles, Placididea Classis nova: description of Placidia cafeteriopsis gen. et sp. nov.
ジャーナル Protist
Abstract A marine flagellate resembling Cafeteria roenbergensis (bicosoecids, stramenopiles) in cell shape and behavior of the cell while attached to substratum was collected from the coast of Japan. The flagellate was examined by light and electron microscopy, and the 18S rDNA was sequenced to elucidate its taxonomic and phylogenetic position. Ultrastructural features suggested that the flagellate is not a bicosoecid, but a relative of the recently described stramenopile, Wobblia lunata. 18S rDNA phylogenetic trees also revealed that the flagellate forms a monophyletic clade with W. lunata and that it is distantly related to Cafeteria and other bicosoecids. The flagellate differs from W. lunata due to its lack of wobbling motion as well as intracellular features such as the number of mitochondria, flagellar apparatus architecture, the presence of a paranuclear body and cytoplasmic microtubules. The similarity of 18S rDNA sequences was 81% between the flagellate and W. lunata. This new flagellate was described as Placidia cafeteriopsis gen. et sp. nov. Because the phylogenetic lineage comprised of W. lunata and P. cafeteriopsis was one of the major, deep-branching clades of the stramenopiles, the class Placididea (= Placidiophyceae) classis nova was proposed.
巻・号 153(2)
ページ 143-56
公開日 2002-6-1
DOI 10.1078/1434-4610-00093
PII S1434-4610(04)70093-0
PMID 12125756
MeSH Animals DNA, Ribosomal / genetics* Eukaryota / classification* Eukaryota / cytology Eukaryota / genetics* Eukaryota / ultrastructure Eukaryotic Cells / classification* Eukaryotic Cells / cytology Eukaryotic Cells / metabolism* Eukaryotic Cells / ultrastructure Flagella / ultrastructure Microtubules / ultrastructure Mitochondria / ultrastructure Molecular Sequence Data Phylogeny* RNA, Ribosomal, 18S / genetics* Sequence Homology, Nucleic Acid
IF 1.989
引用数 26
WOS 分野 MICROBIOLOGY
リソース情報
藻類 NIES-1014