PAXILLOSIDA

Members of the Paxillosida are associated with burial in unconsolidated sediment and most families possess pointed tube feet and a number of other morphological adaptations for digging and living in mud or sand. Phylogenetic molecular revision by Mah and Foltz (2011b) has added families, such as the Pseudarchasteridae and the Benthopectinidae with unpointed tube feet to the Paxillosida suggesting a broader morphological range.