An annotated and illustrated checklist of species of the coral genus Acropora (Cnidaria: Scleractinia) from Vamizi Island, Mozambique Author Sola, Erwan Author Silva, Isabel Marques da Author Glassom, David text African Invertebrates 2015 2015-12-31 56 3 807 807 http://www.bioone.org/doi/10.5733/afin.056.0320 journal article 10.5733/afin.056.0320 2305-2562 7914925 Acropora grandis (Brook, 1892) Fig. 14 Colony growth form : Arborescent with frequent ramifications; main branches are usually straight and upright. Axial corallites : Outer diameter 2.2–2.5 mm ; inner diameter 0.9–1.0 mm; exsert but thin walled; one cycle of large and neat septa, second cycle is absent. Radial corallites : Two sizes; most are tubular to appressed tubular with oblique opening but tend to be longer at the branch tip and slightly nariform; directive septa are prominent and remaining first cycle strongly dentate. Fig. 13. Acropora gemmifera. Specimen number: (A, F, G) VAM22; (B–E) VAM2. (A) live colony; (B) branch tip detail; (C, D) branch fragment; (E, F) axial corallite; (G) radial corallites. Coenosteum : On corallites, costae are joined by synapticules and coarsely reticulate or spongy with occasional spinules in intercorallite area; branch tips are very brittle.