FIG. 2. — Maximum likelihood phylogenetic tree of selected Cladophorales Haeckel, showing the position of the species Okellya marina (Womersley) Wetherbee, comb. nov. as sister to Okellya curvata (Printz) Leliaert & Rueness in the Okellyaceae Leliaert & Rueness family. Numbers shown at nodes represent RAxML rapid bootstrap values. The scale is in estimated substitutions per site in the concatenated 18S and 28S alignment.