title: Revisiting the phylogenetic position of Synchroma grande.
abstract: Two new classes Synchromophyceae and Picophagea, belonging to the heterokonts, have been proposed recently in separate studies of 18S rRNA phylogenies. Here we revise the 18S phylogeny of these classes by including all available sequenced species and applying Bayesian and maximum likelihood methods; Synchroma grande groups with the photophagotrophic Chlamydomyxa labyrinthuloides with high statistical support. This clade is sister to Chrysophyceae, together they share a common ancestry. Our results show that the creation of class Synchromophyceae by Horn et al. was premature, because they did not include data from the closely related C. labyrinthuloides and Picophagus flagellatus species. A revision of these classes should include additional species and most likely multigene phylogenies.
authors: Department of Plant and Environmental Sciences, The Norwegian University of Life Sciences, As, Norway.
authors: Vishwanath
authors: V
authors: Patil
authors: Jon
authors: J
authors: Bråte
authors: Kamran
authors: K
authors: Shalchian-Tabrizi
authors: Kjetill S
authors: KS
authors: Jakobsen
mesh_terms: D000818:Animals; D002696:Chlamydomonas / Q000145:classification* / Q000235:genetics; D048028:DNA, Algal / Q000032:analysis / Q000235:genetics; D019143:Evolution, Molecular; D020459:Genes, rRNA; D010802:Phylogeny; D012337:RNA, Ribosomal, 18S / Q000032:analysis / Q000235:genetics; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D013045:Species Specificity
chemical_list: D048028:DNA, Algal; D012337:RNA, Ribosomal, 18S