Two new species of calcareous sponges (Porifera: Calcarea) from the deep Antarctic Eckström Shelf and a revised list of species found in Antarctic waters Author Rapp, Hans Tore Author Göcke, Christian Author Tendal, Ole Secher Author Janussen, Dorte text Zootaxa 2013 3692 1 149 159 journal article 10.11646/zootaxa.3692.1.9 d25e52db-f40f-4f8c-ab29-564c489de9c7 1175-5326 218976 9DF47E82-8FED-434D-8CB1-81DCBCCB2951 Genus Leucetta Haeckel, 1872 Type species: Leucetta primigenia Haeckel, 1872 (by original designation). Genus diagnosis: Leucettidae with a homogeneous organization of the wall and a typical leuconoid aquiferous system. There is neither a clear distinction between the cortex and the choanoskeleton, nor is a distinct layer of subcortical inhalant cavities present. The atrium may be reduced to a system of exhalant canals that open directly into the osculum or may be a large cavity (modified from Borojevic et al . 2002).