Fig 3. The 50% gene occupancy matrix.

Black indicates sampled genes for each of the 41 taxa. Genes and species are sorted by sampling, with the best sampled in the upper left. The last three taxa, Calibelemnon francei, Craspedacusta sowerbii, and Obelia longissima, had less than 5% gene occupancy and were excluded from further analyses to produce matrix 1.