Sponge Spicules Small 320×256 Medium 640×513 Large 1024×820 Download Tiff Original 2400×1922 | (386.4 KB) Description "Sponge spicules. 1, Monaxon; 2, triod; 3, triaxon; 4, tetraxon; 5, anchor; 6, polyaxon; 7, a kind of amphidisc." -Thomson, 1916 Keywords amphidisc, anchor spicule, monaxon, polyaxon, porifera, spicule types, sponge spicules, tetraxon, triaxon, triod Galleries Sponges Source: J. Arthur Thomson, M.A., LL.D. Outlines of Zoology (New York, NY: D. Appleton & Company, 1916)
