Phylogenetic tree of aeolidacean nudibranchs based on concatenated molecular data (COI + 16S + H3) represented by Bayesian Inference (BI). Numbers above branches represent posterior probabilities from Bayesian Inference. Numbers below branches indicate bootstrap values for Maximum Likelihood. The key clades and illustrated taxa are highlighted in colour. Two taxa with highly convergent external morphology but very distantly related according to the molecular analysis, the Tergipedidae and the genus Myja, are connected by a dotted red line. Neotype ZMMU Op-669 of Facelina auriculata (Müller, 1776) is illustrated on the tree (photograph BE Picton).