Comparative ultrastructural analysis of Chloromonas and Gloeomonas (Chlorophyceae): tracing the origin of Gloeomonas-specific basal apparatus traits

:On the basis of prior phylogenetic analyses placing Gloeomonas as a lineage within the very diverse genus Chloromonas, it was hypothesized that the morphologically distinct Gloeomonas, bearing widely spaced basal bodies, evolved from ancestral organisms like Chloromonas. In addition, the phylogenetically related Chloromonas (Cr.) rubrifilum, was expected to possess traits intermediate to the two forms. To test these hypotheses, we performed...