The Acropora Humilis Group (Scleractinia) Of The Snellius Expedition (1929 - 30) Author van der Meij, Sancia E. T. Author Visser, Rémon R. text Raffles Bulletin of Zoology 2011 2011-02-28 59 1 9 17 journal article 10.5281/zenodo.10106670 2345-7600 10106670 Acropora retusa (Dana, 1846) ( Fig. 3f–g ) Madrepora retusa – Dana, 1846 p. 462. Acropora (Acropora) retusa – Wallace, 1999: 130–131 . Acropora retusa – Veron, 2000: 322 . Material examined. – Indonesia , Bonetambung near Makassar ( RMNH Coel.39606); Batuata ( RMNH Coel.39604–39605); Nenusa Isl., Karatung ( RMNH Coel.39607); Talaud Isl., Beo, Karakelong ( RMNH Coel.39897–39898). Short description. – Colony corymbose; branches terete, appearing broader at tip, 7–13 mm in diameter and up to 30 mm long, growth determinate. Axial corallite outer diameter 2.4–3.5 mm; radial corallites unevenly distributed and in different sizes, tubular with dimidiate openings, sometimes appearing nariform. Biogeography. – The species is represented in the Snellius collection, despite the disjunctive range presented by Wallace (1999) : western Indian Ocean and central Pacific Ocean but not in between. Acropora retusa is found to occur on four sites in Indonesia , ranging from Nenusa Isl. and Talaud Isl., north of Sulawesi , to Bonetambung and Batuata in south Sulawesi . It has also been reported from the Solomon Islands (Veron and Turak, 2006).