This data package contains the following supplementary files for "The Molecular Diversity of Phagotrophic Euglenids Examined Using Single-cell Methods" by Lax & Simpson 2020. 1) raw_images: Raw light-microscopy image files for all isolated phagotrophic euglenids in this study, sorted into individual subfolders based on their sample code (see associated publication). Files are either in jpeg- or TIFF-format. 2) videos: Videos of four phagotrophic euglenids, in mp4-format: PLL10 Urceolus cf. cornutus GGB3 Notosolenus ostium ABLN4 Heteronema II sp. UGS4 Chasmostoma nieuportense. 3) alignments_trees: Data relevant to conducted phylogenetic analyses of phagotrophic euglenids, in SSU rDNA alignments (in fasta-format), and their corresponding treefiles (in NEWICK-format). See associated publication for additional details. 'SSU-main': Trimmed alignment: SSU-base_SSU_Euglenids_noEnto_Nov4-2019.mafft-einsi.manual.masked.fasta Maximum Likelihood tree: SSU-base_RAxML_bipartitions.SSU_Euglenids_noEnto_Nov4-2019.mafft-einsi.manual.masked.tre Bayesian tree: SSU-base_MrBayes_infile.nex.con.tre 'SSU-LB': Trimmed alignment: SSU-LB_SSU_Euglenids_Oct31-2019.mafft-einsi.manual.masked.fasta Maximum Likelihood tree: SSU-LB_RAxML_bipartitions.SSU_Euglenids_Oct31-2019.mafft-einsi.manual.masked.tre 'SSU-noLB': Trimmed alignment: SSU-noLB_SSU_Euglenids_noEnto_noLB_Nov6-2019.mafft-einsi.manual.masked.fasta Maximum Likelihood tree: SSU-noLB_RAxML_bipartitions.SSU_Euglenids_noEnto_noLB_Nov6-2019.mafft-einsi.manual.masked.tre 'SSU-noShort': Trimmed alignment: SSU-noShort_SSU_Euglenids_noEnto_noShort_Nov4-2019.mafft-einsi.manual.masked.fasta Maximum Likelihood tree: SSU-noShort_RAxML_bipartitions.SSU_Euglenids_noEnto_noShort_Nov4-2019.mafft.einsi.manual.masked.tre 'SSU-noRogues': Trimmed alignment: SSU-noRogues_SSU_Euglenids_noEnto_noRogues_Nov6-2019.mafft-einsi.manual.masked.fasta Maximum Likelihood tree: SSU-noRogues_RAxML_bipartitions.SSU_Euglenids_noEnto_noRogues_Nov6-2019.mafft-einsi.manual.masked.tre 'SSU-Discoba': Trimmed alignment: SSU-Discoba_SSU_Discoba_Dec18-2019.mafft-einsi.manual.masked.fasta Maximum Likelihood tree: SSU-Discoba_RAxML_bipartitions.SSU_Discoba_Dec18-2019.mafft-einsi.manual.masked.BSonML.tre 'SSU-Euglenids': Trimmed alignment: SSU-Euglenids_SSU_Euglenids_noEnto_onlyEuglenids_Nov4-2019.mafft-einsi.manual.masked.fasta Maximum Likelihood tree: SSU-Euglenids_RAxML_bipartitions.SSU_Euglenids_noEnto_onlyEuglenids_Nov4-2019.mafft-einsi.manual.masked.mltree.tre 'SSU-Symbiontids: Trimmed alignment: SSU-Symbiontids_Symbiontids_EukRef+Own_Dec16-2019.mafft-einsi.manual.trimal08.fasta Maximum Likelihood tree: SSU-Symbiontids_RAxML_bipartitions.Symbiontids_EukRef+Own_Dec17-2019.mafft-einsi.trimal08.BSonML.tre Untrimmed base alignments: SSU-base_Euglenids_Oct29-2019.mafft-einsi.manual.fasta SSU-Symbiontids_EukRef+Own_Dec16-2019.mafft-einsi.manual.fasta