FIG. 5 in Revision of the genus Sirodotia Kylin (Batrachospermales, Rhodophyta) with description of four new species

FIG. 5. – Morphological features of Sirodotia species: A-E, Sirodotia delicatula Skuja (photos taken from sample BHO A-0984): A, obconical whorls; B, primary fascicle; C, carpogonium with a mature trichogyne (arrow) showing the basal hemispherical protuberance (arrowhead); D, fertilized carpogonium with a sessile cylindrical trichogyne, attached spermatium (arrowhead) and gonimoblast initial developing from the protuberant side of the carpogonial base (arrow); E, carposporangia (arrow) and erect gonimoblast filaments (arrowhead); F-L, Sirodotia delicatuliformis Necchi, N.L.Rossignolo & M.O.Paiano, sp. nov. (photos taken from sample SJRP 31918 – holotype): F, obconical whorls; G, primary fascicle; H, primary fascicle with spermatangia (arrow) and anomalous shape (bent end) trichogyne (arrowhead); I, carpogonium with a mature trichogyne (arrow) showing the basal hemispherical protuberance (double arrow); J, carpogonium with anomalous shape (bifurcate) trichogyne (arrow); K, carpogonium with a sessile cylindrical trichogyne (short arrow), attached spermatium (long arrow) and gonimoblast initial developing from the protuberant side of the carpogonial base (double arrow); L, carposporangia (long arrow) and erect (short arrow) gonimoblast filaments. Scale bars: A, F, 200 μm; B, C, D, E, I, 20 μm; D, K, 10 μm G, H, 50 μm; L, 25 μm. D, redrawn from Johnston et al. (2014); K, redrawn from Necchi (1991).