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Description of Euglypha tuberculataThe test is ovoid, circular in transverse section and is composed of approximately one hundred, oval, shell-plates. The aperture is circular and surrounded by eight to twelve, oval, apertural-plates. The apertural-plates are barely thickened at the denticulate margin, and have a small triangular median tooth with either four or five, smaller, lateral teeth. Shell length 45-100 microns, shell width 24-51 microns, diameter of aperture 10-21 microns, shell-plate length 10-16 microns, shell-plate width 8.7-10.8 microns, apertural plate length 10.8-15.1 microns, apertural plate width 8-10.2 microns.