Borojevic, R.; Boury-Esnault, N.; Manuel, M.; Vacelet, J. (2002 [2004]). Order Baerida Borojevic, Boury-Esnault & Vacelet, 2000. Pp. 1193-1199. In: Hooper, J.N.A. & Van Soest, R.W.M. (eds). Systema Porifera - A guide to the classification of sponges. (2 volumes) Kluwer Academic/ Plenum, NY, 1708+xvliii. ISBN 978-1-4615-0747-5 (eBook electronic version).
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Borojevic, R.; Boury-Esnault, N.; Manuel, M.; Vacelet, J.
2002 [2004]
Order Baerida Borojevic, Boury-Esnault & Vacelet, 2000. Pp. 1193-1199. <i>In:</i> Hooper, J.N.A. & Van Soest, R.W.M. (eds). <i>Systema Porifera - A guide to the classification of sponges</i>
Baerida Borojevic et al. (Calcarea, Calcaronea) contains three families with a leuconoid aquiferous system without radial symmetry, characterized
by a skeleton either made exclusively of microdiactines or in which microdiactines constitute predominantly a specific sector of
the skeleton. As in Lithonida they are represented by well characterized and very distinctive genera, suggestive of long-term evolution.
