Figure 3
Phylogenetic relationships of the echinoderm classes (After Janies, 2001) showing the adults and planktotrophic larvae. Right three rows of figs show representative adults, feeding larvae, and pre-metamorphic larvae. Crinoids do not have a feeding larva. Holothuroids, asteroids and ophiuroids have two larval stages and early larva (auricularia, bipinnaria and ophiopluteus, respectively) and late metamorphic settlement stage larva (doliolaria, brachiolaria and vitellaria, respectively). Echinoids have one larval stage, the echinopluteus, which is also the settlement stage.
