Monographs Details: Riccia sanguineisporis Jovet-Ast
Authority: Bischler, Hélène, et al. 2005. Marchantiidae. Fl. Neotrop. Monogr. 97: 1--262. (Published by NYBG Press)
Description:Species Description - Thalli in gregarious patches; lobes 2-3 times deeply forked, 6-11 mm long, 0.8-1.2 mm wide, obtuse apically; dorsal side grayish green with narrow, pale margins, flanks brownish. Median groove deep from apex to base. Epidermis and the 2 layers below epidermis nearly hyaline, basal walls of epidermal cells and walls of the 4-5 hypodermal cell layers strongly thickened. Ventral scales hyaline, hardly extending beyond lobe margins. Cross section of lobes 0.8 mm high, as wide as high apically to 1.5(-3) times as wide as high near base; dorsal edge acute laterally; flanks suberect to oblique, often with the external layer of cells with thickened walls; ventral edge convex; cell walls of ventral tissue thin. Monoecious? Spores subspherical, 130-145 |nm diam., dark red, wingless, crenulate; distal face without areoles, with large, red-black tubercles at the poles becoming smaller toward equator; proximal face with similar ornamentation, triradiate scar of large, dark red tubercles, not reaching the equator.

Discussion:The thickened walls of the epidermal and hypo-dermal cells and the marginal hyaline cell row of the narrow margin of the lobes, indicate an affinity with Riccia sorocarpa. However, in all other features of thallus and spores the 2 species are quite distinct.
Distribution:Mato Grosso do Sul Brazil South America|