Synedrosphenia bikarensis, cont. A–C valvocopula: apical portion in advalvar view (A) with asymmetrical notch at apical pole (arrow), middle portion (B) with long sturdy fimbriae (ext = external surface, int = internal surface), and basal portion in girdle view (C) D, E internal views of apical and basal poles, respectively, of same valve with valvocopula, showing opposite asymmetry of the notches (arrows) F basal portion of valve with attached girdle bands, showing how the copula fimbriae fit over the valvocopula at poles (arrow) G apical portion of copula showing poration. Scale bars: 5 µm.