FIGURE 5. A–C in Morphological diversity of benthic Nostocales (Cyanoprokaryota/Cyanobacteria) from the tropical rocky shores of Huatulco region, Oaxaca, México

FIGURE 5. A–C. Calothrix sp. A. Entangled filaments. B, C. Curved heteropolar filaments without terminal hair, cells more or less isodiametric. D–H. Hassallia littoralis. D. Heteropolar filaments with basal heterocyte. E. Divaricated false branch with basal heterocyte. F. Closed apex. G. Heteropolar hormogonia. H. Terminal widening of the sheath. bhet = basal heterocyte. Scale bars = 6 μm.