Description
Shell generally latticed , or sometimes spongy, composed of hollow rods that form a cortical network with triangular or polygonal meshes supporting radial by-spines (spines arising at the nodes of the meshwork) (Fig . 20).
Type species
Figures
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Raw text
Shell generally latticed , or sometimes spongy, composed of hollow rods that form a cortical network with triangular or polygonal meshes supporting radial by-spines (spines arising at the nodes of the meshwork) (Fig . 20).