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Description of Euglypha acanthophoraThe aperture is surrounded by ten to thirteen evenly spaced apertural-plates. Each apertural-plate is roughly circular and carries a large median tooth with either four or five smaller lateral teeth on each side. Apertural-plates not only border the aperture, but are also seen in the second and third row of plates inside the aperture. In clonal cultures abnormally shaped shells occur which are either specimens with deformed apertural regions, or small specimens about half or two-thirds normal length, with wide apertures. Shell length 53-84 microns, shell width 28-46 microns, diameter of aperture 14-25 microns, shell-plates length 10.9-12 microns, shell-plates width 7.9-9.1 microns, apertural plates length 8.1-12.5 microns, apertural plates width 7.2-11.4 microns, length of elongated shell-plates 17-35 microns.