 Canalipalpata is equivalent to the old taxonomic group "Sedentaria", worms that stay in one place, living in a self-made tube composed of mud or sand cemented together with mucus.Members of Canalipalpata are worms with elongated grooved palp structures used for feeding and the order is divided into suborders Sabellida, Spionida and Terebellida.Further research is likely to result in changes to the cladistics of the annelids, the monophyly of which is in doubt.