Borojevic, R.; Boury-Esnault, N.; Manuel, M.; Vacelet, J. (2002). Order Baerida Borojevic, Boury-Esnault & Vacelet, 2000, in: Hooper, J.N.A.; Van Soest, R.W.M. (Ed.) (2002). Systema Porifera: a guide to the classification of sponges. pp. 1193-1200
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The PDF supplied here is a proof - NOT the definitive printed text - of a chapter of the Systema Porifera