FIGURE 2 in Vansoestia caribensis gen. nov., sp. nov.: first report of the family Ianthellidae (Verongida, Demospongiae) in the Caribbean

FIGURE 2. Photomicrographs of Vansoestia caribensis gen. nov. sp. nov. histological cross sections. A. Upper body region showing a thin ectosome (Ec) followed by wide subdermal canals (Sc) and the choanoderm with densely arranged choanocyte chambers (Cc). Scale = 110 µm. B. Detail of an area of the ectosome showing a dense "amorphous matrix" (Am) of collagen with dispersed dark stained cells with inclusions (Ci), Scale = 30 µm; C. Basal region where the sponge is attached to the substrate. Note the corallites (Co) of the dead coral where the sponge was growing, the choanocyte chambers (Cc) and canals (Ca), Scale = 200 µm. D. Detail of choanocyte chamber with more than 20 choanocytes (oval to triangular in shape). Notice at least two types of cells with inclusions (Ci) and collagen strands (Cs) in between the chambers and the cells, Scale = 15 µm.