Fig. 3

Species tree of Clade A, including Melinna cristata as outgroup. Tips were labelled following the species delimitation by Stacey, and specimens that were not clustered together with a posterior probability above 0.8 were given distinct names. Branch labels are showing posterior probabilities, and an asterisk (*) indicates PPÂ =Â 1. Clades from CBEs are indicated with a grey box, and the habitats of each species from CBEs are shown with symbols. Numbers in brackets indicate the number of specimens per species