33: Protostomes Last updated Dec 2, 2021 Save as PDF 32.6.1: Molecular Analyses and Modern Phylogenetic Trees 33.1: The Clades of Protostomes Page ID73862 ( \newcommand{\kernel}{\mathrm{null}\,}\) 33.1: The Clades of Protostomes33.1.1: Superphylum Ecdysozoa33.1.2: Superphylum Lophotrochozoa33.1.3: Phylum Platyhelminthes33.1.4: Phylum Rotifera33.1.5: Phylum Nemertea33.1.6: Phylum Mollusca33.1.7: Classification of Phylum Mollusca33.1.8: Phylum Annelida33.2: Flatworms (Platyhelminthes)33.2.1: Superphylum Lophotrochozoa33.2.2: Phylum Platyhelminthes33.3: Rotifers (Rotifera)33.3.1: Superphylum Lophotrochozoa33.3.2: Phylum Rotifera33.4: Mollusks (Mollusca)33.4.1: Phylum Mollusca33.4.2: Classification of Phylum Mollusca33.5: Ribbon Worms (Nemertea)33.6: Annelids (Annelida)33.7: Bryozoans (Bryozoa) and Brachiopods (Brachiopoda)33.8: Roundworms (Nematoda)33.9: Arthropods (Arthropoda)33.9.1: Subphyla of Arthropoda