Batrachospermum beraense Kumano (Batrachospermaceae, Rhodophyta) is reported for the first
time from Sabah, North Borneo, Malaysia. B. beraense from Sabah is characterized by the following
combination of features: (i) olive green to blue-green monoecious or dioecious plants that are 2–7 cm
high with a diameter of 300–590 μm, more or less dichotomously branched, and mucilaginous; (ii)
laterally branched primary fascicles consisting of 7–18 cell-storeys; cylindrical or ellipsoidal fascicle
cells that are 4.6–6.1 μm in diameter and 15–30 μm long with numerous short and long terminal hairs;
(iii) spherical spermatangia that are 4–7 μm in diameter and are either terminal or subterminal on
fascicles; (iv) straight carpogonium-bearing branches, differentiated from fascicles, that are 72–125
μm long, consisting of 8–14 cells, arising from a pericentral cell; (v) ovoidal and indistinctly stalked
trichogyne; (vi) single, axial, and spherical to ellipsoidal carposporophytes that are 63–120 μm in
diameter and obovoidal carposporangia that are 7.7–11 μm in diameter and 12–18 μm long.
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