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An Orphan Protist Quadricilia rotundata Finally Finds Its Phylogenetic Home in Cercozoa
Author(s) -
Yabuki Akinori,
Ishida Kenichiro
Publication year - 2018
Publication title -
journal of eukaryotic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.067
H-Index - 77
eISSN - 1550-7408
pISSN - 1066-5234
DOI - 10.1111/jeu.12502
Subject(s) - protist , biology , phylogenetic tree , phylogenetics , phylogenetic relationship , evolutionary biology , botany , genetics , gene
Quadricilia rotundata is a heterotrophic flagellate with four flagella. However, because this species has no clear morphological characteristics or molecular data affiliating it with any known group, Q. rotundat a has been treated as a protist incertae sedis , for a long time. Here, we established a clonal culture of Q. rotundata and sequenced its 18S rDNA sequence. Molecular phylogenetic analysis successfully placed Q. rotundata in an environmental clade within Cercozoa, which contributes to expand the morphological and species diversity within Cercozoa. We also discuss morphological evolution within Cercozoa based on this finding.