[Kingdom] Animalia Linnaeus, 1758 - animals Grade Enterozoa Grade Cœlomata Phylum Appendiculata {Lankester} Branch Chætopoda Class Oligochæta Grube, 1850 - oligochaetes see [unranked] oligochaetous Clitellata 1 Order Naidina 2 Order Sœnurina 3 Order Lumbricina