Revision and catalogue of worldwide staghorn corals Acropora and Isopora (Scleractinia: Acroporidae) in the Museum of Tropical Queensland Author Wallace, Carden C. Author Done, Barbara J. Author Muir, Paul R. text Memoirs of the Queensland Museu Nature 2012 2012-06-30 57 1 258 journal article 28769 10.5281/zenodo.2163512 efa6ed42-a9c8-4eb7-909e-81fb4091b243 0079-8835 2163512 Acropora rudis (Rehberg, 1892) ( Fig. 84 ) Madrepora rudis Rehberg, 1892: 41, pl. 4 fig. 9. Type locality. Ceylon (Sri Lanka) (holotype NMB). MTQ Holdings. Maldives: G60273; Sri Lanka: G55223–24, G55577–78; Bangladesh: G50567; Thailand: G37293, G37302, G55983–84, G56094–97, G61757; Indonesia: G47165–66 Sumatra. Species group: rudis . Description. Colony outline: indeterminate, predominantly arborescent. Branches: tertiary branching order absent; length: 5 0–100 mm; diameter:>19.9 mm, axial-dominated, tapering; radial crowding: some touching; axial/radial ratio:>1:10. Axial corallites: greater than three synapticular rings; not porous; outer diameter 2.6–4.1 mm; inner diameter 0.6–1.2 mm; primary septa to ¾ R. Radial corallites: very large; greater than three synapticular rings; one size or graded; inner wall developed; shape: rounded tubular; openings: oval-rounded; primary septa to ½ R. Coenosteum: same on and between radials: reticulate; spinule shape: elaborate. Further literature. Wallace & Wolstenholme (1998), Wallace (1999), Veron (2000).