FIGURE 9 in Taxonomic revision of Riella subgenus Trabutiella (Riellaceae, Sphaerocarpales)

FIGURE 9. Scanning electron microscopy photographs of spores from dioicous species of Riella subgen. Trabutiella. A–B. R. aff. cossoniana, Holocene fossil. C–J. R. paulsenii. A, C, G. General view of distal face. D, H. General view of proximal face. B, E, I. Details of the spore surface and spines of distal face. F, J. Details of the spore surface and spines of proximal face. (A–B from 9.330 VAL-Briof.; C–F from holotype C, G–J from 5.85 LE).