Genus Leucetta Haeckel, 1872

“ 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 the presence of a distinct layer of subcortical inhalant cavities (lacunae). The atrium is frequently reduced to a system of exhalant canals that open directly into the osculum, or may be a large cavity” (Borojevic et al. 2002; Valderrama et al. 2009).