Order Spirophorida Bergquist & Hogg, 1969. Pp. 83-84 - Van Soest, R.W.M.; Hooper, J.N.A. (In: Hooper, J.N.A. & Van Soest, R.W.M. (eds) Systema Porifera. A guide to the classification of sponges, 2002)