Figure 1
From: The diversity, development and evolution of polyclad flatworm larvae
Phylogenetic relationships of the Spiralia and the Platyhelminthes. (A) Spiralians [9]. (B) Platyhelminthes [10]. (C) A skeleton phylogeny of polyclads from a Bayesian analysis of 28S rDNA sequence data [5]. Mode of development of platyhelminth groups and polyclads indicated in red (free-swimming ciliated larvae) and blue (direct development). Question mark (?) indicates mode of development is unknown.