. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 200 um Phylum Rhodophyta Class Florideophyceae Order Corallinales Family Corallinaceae Transverse section of tetraspo- rangial conceptacle with zonately divided tetrasporangia (z). Transverse section showing sev- eral lateral fusions (f). Transverse section showing cell arrangement with trichocytes (t). Surface view of cells and large trichocytes (t). Neosiphonia sphaerocarpa Kim & Lee 1999 280 Thallus: filamentous, fine, tufted, bushy, to 2 cm high, light brown to rose-red to maroon; branching a
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 200 um Phylum Rhodophyta Class Florideophyceae Order Corallinales Family Corallinaceae Transverse section of tetraspo- rangial conceptacle with zonately divided tetrasporangia (z). Transverse section showing sev- eral lateral fusions (f). Transverse section showing cell arrangement with trichocytes (t). Surface view of cells and large trichocytes (t). Neosiphonia sphaerocarpa Kim & Lee 1999 280 Thallus: filamentous, fine, tufted, bushy, to 2 cm high, light brown to rose-red to maroon; branching alternate to somewhat dichotomous. Prostrate axis 100-210 um diam. Erect axis 60-1 50 um diam., of four pericentral cells; lateral branches 60-125 um diam., often basally constricted, replacing apical laments; cortication absent; lament scar cells common; segments () diameters long. Apical filaments deciduous, rarely to 800 um long. Holdfast initially disc- like, later attached by unicellular rhizoids; rhizoids separated from parent cell by wall, distal on pericentral cells, commonly attaching to nearby branches creating mesh- like net which traps sand. Tetrasporangia spherical, 50-60 um diam., tetrahedrally divided, as swollen spiral series in outer branchlets. Common: inconspicuous, epiphytic on larger plants or on hard surfaces, in wave- exposed areas; lower intertidal to 8 m deep. Highborne Cay distribution: only occurring in the stromatolite and thrombolite zones. Phylum Rhodophyta Class Florideophyceae Order Ceramiales Family Rhodomelaceae. 1. Apex of erect axis. 2. Axis with spirally arranged tetraspo- rangia. 3. Prostrate axes showing commonly occurring rhizoidal attachment to adjacent Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research C
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