Sorenson, M. V. Sterrer, W. Giribet, G. 2006 Gnathostomulid phylogeny inferred from a combined approach of four molecular loci and morphology Cladistics 22 32-58 Urodasys_sp Megadasys_sp Tetranchyroderma_sp Limnognathia_maerski Paracatenula_polyhymia Opecoelidae_sp Symbion_americanus Symbion_pandora Adineta_vaga Filinia_longiseta Euchlanis_dilatata Asplanchnopus_dahlgreni Eothinia_elongata Austrognatharia_strunki Austrognatharia_sp_Galapagos Austrognathia_christianae Austrognathia_sp_Scripps Nov_gen_et_nov_spec_1 Cosmognathia_arcus Cosmognathia_aquila Gnathostomula_armata Gnathostomula_axi Gnathostomula_paradoxa Gnathostomula_peregrina Haplognathia_gubbarnorum Haplognathia_lunulifera Haplognathia_rosea Haplognathia_ruberrima Haplognathia_simplex Labidognathia_longicollis Mesognatharia_remanei Onychognathia_rhombocephala Problognathia_minima Rastrognathia_macrostoma Tenuignathia_rikerae Valvognathia_pogonostoma Osteology Maximum Parsimony Based on reanalysis of the original matrix. Sorenson_etal_2006a.