FIGURE 1 in Description of Peridiniopsidaceae, fam. nov. (Peridiniales, Dinophyceae)

FIGURE 1. Peridiniaceae and Peridiniopsidaceae, fam. nov., have distinct systematic positions in the peridinialean molecular tree. Maximum Likelihood (ML) tree (–ln=62.863,31) of 89 Peridiniales operational taxonomic units (OTUs; plus 42 Amphidomataceae as outgroup, not shown) under the GTR+Γ substitution model. For alignment constitution, we defined three regions of the rRNA: SSU, ITS, LSU, and included all Peridiniales, of which sequence information in all three regions were available. Freshwater lineages are shaded in green, and the Peridiniopsidaceae, fam. nov., with its type species, Peridiniopsis borgei, are highlighted. Branch lengths are drawn to scale, with the scale bar indicating the number of nucleotide substitutions per site. The numbers on the branches are statistical support values (above: ML bootstrap values derived from 1.000 non-parametric replicates, values <50 are not shown; below: Bayesian posterior probabilities derived from two independent analyses of four chains with 20.000.000 cycles, sampled every 1.000th cycle, values <.90 are not shown). Asterisks indicate maximal support. Abbreviations: BLA: Blastodiniaceae. E/Pe: clade including Ensiculifera and Pentapharsodinium. HET: Heterocapsaceae. KRY: Kryptoperidiniaceae. PER: Peridiniaceae. T/Pf: clade including Pfiesteria and Thoracosphaera. ZOO: Zooxanthellaceae.