Cyclorhagida
Cyclorhagida is a class of kinorhynchs, small marine invertebrates that are widespread in mud or sand at all depths as part of the meiobenthos, commonly known as '''mud dragons.'''
Orders and families
- Order Echinorhagata Sørensen et al., 2015
- * Echinoderidae Zelinka, 1894
- Order Kentrorhagata Sørensen et al., 2015
- * Antygomonidae Adrianov & Malakhov, 1994
- * Cateriidae Gerlach, 1956
- * Centroderidae Zelinka, 1896
- * Semnoderidae Remane, 1929
- * Zelinkaderidae Higgins, 1990
- Order Xenosomata Zelinka, 1907
- ** Campyloderidae Remane, 1929
- Family incertae sedis
- * Tubulideres Sørensen, Heiner, Ziemer & Neuhaus, 2007
- * Wollunquaderes Sørensen & Thormar, 2010