. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 3-rd system. Fig. 5. The spur and groove systems of the autochthonous reef facies southwestward of Yongxing coral reef range from to 1 m. Coral species are dominated by encrusting, branching, plate-like (microatoll) and hemispherical corals. Scleractinian corals include Acropora (), Montipora, Porites and Favia. In the Xisha Islands there are microatolls of Heliopora () and encrusting Tubipora amongst octocorals, a characteristic feature of IndoPacific reef flats (Milliman 1974). The variety of
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 3-rd system. Fig. 5. The spur and groove systems of the autochthonous reef facies southwestward of Yongxing coral reef range from to 1 m. Coral species are dominated by encrusting, branching, plate-like (microatoll) and hemispherical corals. Scleractinian corals include Acropora (), Montipora, Porites and Favia. In the Xisha Islands there are microatolls of Heliopora () and encrusting Tubipora amongst octocorals, a characteristic feature of IndoPacific reef flats (Milliman 1974). The variety of biota on the flats in the South China Sea is remarkable. The reef habitat organisms include mollusca, ostracoda, echinodermata, sponges, foraminifera, along with numerous algae dominated by Ha 1imeda and Udotea? All 6 species of Tridacnidae (Fig. 17) are present, which is another characteristic feature of Indo-Pacific areas (Zhuang Qiqian, et a] 1978). Benthonic foraminifera grow profusely and form of the foraminiferal assemblage, which is dominated by Calcarina sp. and Amphistegina sp. (Wang Guozhong 1986).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Institution; National Museum of Natural History (U. S. ); United States. Bureau of Sport Fisheries and Wildlife. Washington, D. C. : [Smithsonian Press]
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