Taxa;"Equatorial axis (μm)";"Polar axis (μm)";P/E;Shape;"Size rank";Aperture;Sculpture "P. arisanense var. arisanense";28.03±0.66;24.07±0.83;0.86;spheroidal;medium;simple-sulcate;perforate "P. arisanense var. chingshuishanianum";38.03±3.03;32.81±3.37;0.86;spheroidal;medium;simple-sulcate;perforate "P. arisanense var. formosanum";40.87±0.26;31.34±2.00;0.77;spheroidal;medium;simple-sulcate;perforate