Supporting data regarding the construction of a 63-gene concatenated tree of all photosynthetic stramenopiles. This dataset includes:

• detailed BLAST outputs for the complete protein-coding component of Phaeodactylum tricornutum, searched against complete libraries from each species incorporated into the alignment
• fasta format clusters and single-gene neighbour-joining trees for 65 proteins with broad (>90%) ochrophyte conservation
• a concatenated 26693 aa alignment of 63 proteins for which ochrophyte sequences were verified to be monophyletic, and eight modified alignments from which fast-evolving site categories were serially deducted. A "readme" file in the main directory provides additional details as deemed appropriate.