Figs 6-10. Besa papillaeformis, topotype material (Setchell #6485, UC173490). Longitudinal sections through vegetative thalli. Figs 6-7. Uprights arising from crust surface. Figs 8-9. Crust composed of isodiametric and vertically elongated cell files, and secondary pit connection formation. Fig. 10. Dome-shaped bulges welling up from surface of crust.