Fossils reveal a high diversity of the staghorn coral genera Acropora and Isopora (Scleractinia: Acroporidae) in the Neogene of Indonesia Author Santodomingo, Nadiezhda Author Wallace, Carden C. Author Johnson, Kenneth G. text Zoological Journal of the Linnean Society 2015 2015-11-18 175 4 677 763 http://dx.doi.org/10.1111/zoj.12295 journal article 10.1111/zoj.12295 0024-4082 5339562 ACROPORA HORRIDA GROUP Diagnosis Colony shape within this group has a large phenotypic plasticity, ranging from open arborescent through hispidose to irregular caespitose. Radial corallites simple tubular with round calices, evenly sized; coenosteum bearing simple to moderate elaborated spinules, sometimes fused and solid ( Wallace & Wolstenholme, 1998 ; Wallace, 1999 ). All extant species have indeterminate growth and inhabit subtidal sheltered habitats ( Wallace, 1999 ). The fossil record of Indonesia has representatives of six extant species and one new extinct species is described to science.