Synedrosphenia licmophoropsis sp. nov., girdle bands A, B frustule in girdle view with thecal elements labeled, respectively on the apical part and the basal pole of the same cell also showing the asymmetrical apical notches in the valvocopula (arrows) (GU55D-3) C small portion near middle of frustule where pleura (pl) is exposed (GU76B-2) D, E basal pole of valvocopulae at 0° tilt with opposite valve in the background and tilted to show complex shape of the pars interior, arrowhead pointing toward notch (GU76B-2 and TK4, respectively) F portions of valvocopula and copula showing fimbriate inner edges (GU55D-3) G valvocopula, apical pole in abvalvar aspect with attached valve, showing elongated pores on inner edge (arrow) (GU44BJ-2) H apical portion of copula showing very long fimbriae at the tip (arrow) (GU55D-3) I relationship between first two girdle bands at basal pole, the long fimbriae of the copula overlapping the valvocopula (GU76B-2). Scale bars: 10 µm (A, B, F, H); 5 µm (C–E, G, I).