Morphology and phylogenetic position of a rare four-celled green alga, Pascherina tetras (Volvocales, Chlorophyceae), based on cultured material

摘要: Abstract: Since the original description in 1928, four-celled colonies of spondylomoracean genus Pascherina have not been studied detail due to a lack reliable culture strains this for reexamination and molecular phylogenetic analyses. Here, we established new tetras, only species genus, from Japanese samples conducted detailed light transmission electron microscopic observations analysis based on strains. The features material were consistent with those collected Ukraine, except stigma chloroplast; was ring-shaped surface view. confirmed by microscopy. Our revealed that robustly separated other three colonial volvocalean lineages: Stephanosphaera (Haematococcaceae), volvoc...