. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 85 Halimeda incrassata ti. eins) Lamouroux isi6:307 Thallus: erect, to 25 cm high, light to dark green; branching somewhat dichotomous, initial branching in one plane. Segments heavily calci ed, hard, brittle, disc- like, oval to kidney- shaped, to 1 4 mm wide, 10 mm long, mm thick, often ribbed and/or lobed; basal segments fused. Utricles in 3-5 layers; surface utricles 34-90(-l 05) urn diam., 40-1 25 urn long, 2-4 supported by each subsurface utricle; subsurface utricles oval, swollen, 23-90 urn
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 85 Halimeda incrassata ti. eins) Lamouroux isi6:307 Thallus: erect, to 25 cm high, light to dark green; branching somewhat dichotomous, initial branching in one plane. Segments heavily calci ed, hard, brittle, disc- like, oval to kidney- shaped, to 1 4 mm wide, 10 mm long, mm thick, often ribbed and/or lobed; basal segments fused. Utricles in 3-5 layers; surface utricles 34-90(-l 05) urn diam., 40-1 25 urn long, 2-4 supported by each subsurface utricle; subsurface utricles oval, swollen, 23-90 urn diam., 30-115 urn long. Joint siphons uniting as single group, uncalci ed. Rhizoidal mass bulbous. Sporangia spherical to oval, bright green, 200-380 urn diam. on dichotomously forked stalk, densely clustered at margins of fertile segments. Common: associated with seagrasses or on shallow sand ats; to 1 2(-65) m deep. Highborne Cay Distribution: common on the reef Surface view. 100/im Surface utricles in longitudinal section Phylum Chlorophyta Class Bryopsidophyceae Order Bryopsidales Family Halimedaceae RhipOCephdlUS phoenix (J. Ellis & Solander) KLitzing 1 843: 311 Thallus: lightly calcified, to 1 0 cm high, dark green. Cap oval, of small blades in close proximity to main stalk. Blades 2-3 cm long, concentric, attened, symmetrical; siphons cylindrical, parallel, fused laterally, 200-250 urn diam. proximally, 50-100 urn diam. distally; dichotomies equal distances from base, lower one or two dichotomies not constricted after decalci cation, others evenly constricted. Stipe cylindrical, 3-5 mm diam., 2-5 cm long; cortical appendages tightly packed, repeatedly branched with blunt, nger- like apices. Rhizoidal mass compact. Common: on rock or sand, often among seagrasses; to 20 m deep. Highborne Cay Distribution: only found on the reef Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - color
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