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Scanning electron microscopy (SEM) of ethanol discharged C. fleckeri nematocysts. (A) A discharged microbasic p-mastigophore (white arrowhead) with the extrude shaft (black arrow) and an atrichous isorhiza (white arrow); (B) Small sub-spherical p-rhopaloid. Note the operculum (white arrow); (C) High magnification SEM of shafts and tubules of microbasic p-mastigophores. Note the spines (white arrow); (D) Sublimed surface of a discharged tentacle. Scale bars, 10 µm.
