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FIGURE 10–13. Hydrolithon reinboldii. FIGURE 10 in Taxonomy and distribution of non-geniculate coralline red algae (Corallinales, Rhodophyta) on rocky reefs from Ilha Grande Bay, Brazil

FIGURE 10–13. Hydrolithon reinboldii. FIGURE 10. External morphology (RB 493708). Scale bar = 1 cm. FIGURE 11. Longitudinal section showing a single layer of rounded epithallial cells (e), subepithallial initials (s) and cell fusions between adjacent filaments (white arrow) (RB 493709) Scale bar = 100 μm. FIGURE 12. Magnified view of a tetrasporangial conceptacle roof showing the enlarged cells (E, white arrow) lining the pore canal and the pore canal opening sunken slightly below the thallus surface (black arrow) (RB 493709). Scale bar = 10 μm. FIGURE 13. Longitudinal section through a tetrasporangial conceptacle showing zonately divided tetrasporangia (te) (RB 493709). Scale bar = 50 μm.

FIGURE 12 in Morphological and molecular characterization of Hydrolithon rupestre (Corallinaceae, Corallinales, Rhodophyta): first report from the Mediterranean Sea

FIGURE 12. ML tree inferred from psbA gene sequences, calculated using the GTR+G+I model of evolution. Numbers near nodes indicate bootstrap values (>50%) for ML analysis (left), and MP analysis (right). The Adriatic species sequence determined in this work is indicated as LN849721 'Hydrolithon rupestre'.

FIGURE 11 in Morphological and molecular characterization of Hydrolithon rupestre (Corallinaceae, Corallinales, Rhodophyta): first report from the Mediterranean Sea

FIGURE 11. ML tree inferred from nSSU gene sequences, calculated using the GTR+G+I model of evolution. Numbers near nodes indicate bootstrap values (>50%) for ML analysis (left), and MP analysis (right). The Adriatic species sequence determined in this work is indicated as LN849720 'Hydrolithon rupestre'. The type species for each genus is bolded.

FIGURES 5–10 in Morphological and molecular characterization of Hydrolithon rupestre (Corallinaceae, Corallinales, Rhodophyta): first report from the Mediterranean Sea

FIGURES 5–10. Reproductive anatomy of Hydrolithon rupestre from the Mediterranean (UWC 14/V3). 5. Vertical section of the thallus through a buried spermatangial conceptacle showing unbranched (simple) spermatangial systems restricted to the conceptacle floor (arrowheads) (scale bar = 20 μm). 6. Vertical section of the outer thallus through a carposporangial conceptacle showing a continuous central fusion cell (arrowhead) bearing peripheral gonimoblast filaments each terminating in a carposporangium (g). Note the remains of unfertilised carpogonia across the dorsal surface of the fusion cell (arrow) (scale bar = 20 μm). 7. Vertical section of the outer thallus showing a flush (left) and a raised (right) tetrasporangial conceptacle (T), as well as a buried tetrasporangial conceptacle (t). Note the absence of a central columella and the arrangement of the tetrasporangia across (right conceptacle) the chamber floor (scale bar = 50 μm). 8. Vertical section through the roof of a tetrasporangial conceptacle showing the enlarged, domed cells (arrows) lining the base of the pore canal. Note that the roof is comprised of 3–4 cells (scale bar = 20 μm). 9. Vertical fracture through the roof of a tetrasporangial conceptacle under SEM showing the enlarged, domed cells (arrow) lining the base of the pore canal (scale bar = 30 μm). 10. Vertical section through a senescent tetrasporangial conceptacle showing the remains of filaments (arrows) that gave rise to the roof and pore canal cells. Note the enlarged, domed cells (arrowheads) lining the base of the pore canal and the absence of a central columella (scale bar = 20 μm).

FIGURES 1–4 in Morphological and molecular characterization of Hydrolithon rupestre (Corallinaceae, Corallinales, Rhodophyta): first report from the Mediterranean Sea

FIGURES 1–4. Gross morphology and vegetative anatomy of Hydrolithon rupestre from the Mediterranean (UWC 14/V3). 1. Encrusting to warty habit (scale bar = 20 mm). 2. Vertical section of the inner thallus showing plumose medullary filaments. Note the cell fusions (f) between contiguous filaments (scale bar = 20 μm). 3. Vertical section of the outer thallus showing a single epithallial cell layer (arrowheads) and solitary to paired trichocytes (T). Note the cell fusions (f) between contiguous cortical filaments and the normal vegetative filaments (arrows) between trichocytes (scale bar = 20 μm). 4. Vertical section through the outer thallus showing buried trichocytes (T) (scale bar = 20 μm).

FIGURES 10–13. Hydrolithon rupestre. 10 in Rhodolith-forming species of the subfamilies Neogoniolithoideae and Hydrolithoideae (Rhodophyta, Corallinales) from Espírito Santo State, Brazil

FIGURES 10–13. Hydrolithon rupestre. 10. Longitudinal sections showing solitary trichocytes (white arrow), rounded to flattened epithelial cells (grey arrow), fusion cells (black arrow). Scale = 14 μm. 11. Tetrasporangial conceptacle. Scale = 15 μm. 12. Monomerous growth (white arrow). Scale = 17 μm. 13. Tetrasporangial roof detail with large cells characteristic of genus Hydrolithon. Scale = 19 μm.

FIGURES 45–50 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 45–50. Vegetative and tetrasporangial anatomy of Neogoniolithon rugulosum (USNC 71-53-4).

FIGURES 37–43 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 37–43. Vegetative and tetrasporangial anatomy of Neogoniolithon erosum (TRH A2-101).

FIGURE 36 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURE 36. Holotype specimen and slides of Neogoniolithon erosum (TRH A2-101).

FIGURES 29–30 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 29–30. Lectotype and slide of Neogoniolithon caribaeum (TRH A1-8).

FIGURES 31–35 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 31–35. Vegetative and tetrasporangial anatomy of Neogoniolithon caribaeum (TRH A1-8).

FIGURES 22–28 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 22–28. Tetrasporangial anatomy of Hydrolithon samoënse.

FIGURES 18–21 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 18–21. Gametangial anatomy of Hydrolithon samoënse.

FIGURES 5–11 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 5–11. Reproductive anatomy of the lectotype of Hydrolithon samoënse (TRH A2-111).

FIGURES 15–19 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 15–19. Vegetative anatomy of Hydrolithon samoënse.

FIGURES 12–14 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 12–14. Gross morphology of representative specimens of Hydrolithon samoënse.

FIGURES 1–4 in Taxonomic review of Hydrolithon samoënse (Corallinaceae, Corallinales, Rhodophyta) and other taxa found to be conspecific

FIGURES 1–4. Vegetative anatomy of the lectotype of Hydrolithon samoënse (TRH A2-111).