FIG. 4 in Revision of the genus Sirodotia Kylin (Batrachospermales, Rhodophyta) with description of four new species

FIG. 4. – Morphological features of Sirodotia species. A-E, Sirodotia assamica Necchi, Rossignolo, Yasmin, J.A.West & Ganesan (photos taken from samples SJRP 32583, 32584): A, B; primary fascicles with spermatangia in clusters (arrows); C, a carpogonium with a mature trichogyne (arrow) showing the basal hemispherical protuberance (arrowhead); D, fertilized carpogonium with attached spermatium (arrow), gonimoblast initial (arrowhead) developing from the same side of the basal protuberance (arrowhead); E, carposporangia (arrow), prostrate (arrowhead) and erect (double arrowhead) gonimoblast filaments; F-J, Sirodotia cryptica Necchi, N.L.Rossignolo & M.O.Paiano, sp. nov. (photos taken from sample SJRP 32575 - holotype): F, obconical whorls; G, primary fascicle with spermatangia (arrow); H, carpogonium with a mature cylindrical trichogyne (arrow) showing the basal hemispherical protuberance (arrowhead); I, fertilized carpogonium with a sessile elongate-conical trichogyne (arrowhead), attached spermatium (arrow) and gonimoblast initial developing from the protuberant side of the carpogonial base (double arrowhead); J, carposporangia (arrows) and erect gonimoblast filaments (arrowheads). Scale bars: A, B, G, 50 μm; C, D, H-J, 20 μm; E 10 μm; F, 200 μm. B-D, reproduced with permission from Rossignolo et al. (2020) (Magnolia Press).