Phylogenetic position of a rare loricated green alga, Cephalomonas granulata N. L. Higinb. (Volvocales, Chlorophyceae)

Takashi Nakada, Tomoyoshi Soga, Masaru Tomita

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Cephalomonas (Cp.) granulata N. L. Higinb. (Volvocales, Chlorophyceae), a rare volvocalean phytoflagellate, has recently been isolated from a paddy field in Japan and examined by light and fluorescence microscopy. The vegetative cells of Cp. granulata have granulate loricae and a characteristic mushroom-like shape with a hemispherical to spherical anterior part and narrower posterior part. Cp. granulata has been classified among the Phacotaceae along with other loricated genera. However, its phylogenetic position has not been investigated using molecular phylogeny. To evaluate the phylogenetic position of Cephalomonas, the 18S rRNA gene sequence of the Japanese strain was determined. The phylogenetic analyses revealed that Cp. granulata was not closely related to other loricated taxa with known phylogenetic affinities, such as Phacotaceae sensu stricto (Phacotus, Pteromonas, and Wislouchiella) and Dysmorphococcus globosus. This indicates at least three independent origins of loricae within the Volvocales.

Original languageEnglish
Pages (from-to)62-68
Number of pages7
JournalPhycological Research
Volume58
Issue number1
DOIs
Publication statusPublished - 2010 Jan

Keywords

  • 18S rRNA
  • Cephalomonas granulata
  • Lorica
  • Molecular phylogeny
  • Phacotaceae

ASJC Scopus subject areas

  • Aquatic Science
  • Agricultural and Biological Sciences (miscellaneous)
  • Plant Science

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