Microphysogobio bicolor Author Salimi, Parisa Alidoost Department of Marine Science, Science and Research Branch, Islamic Azad University, Tehran, Iran Author Mostafavi, Pargol Ghavam Department of Marine Science, Science and Research Branch, Islamic Azad University, Tehran, Iran Author Chen, Chaolun Allen Biodiversity Research Center, Academia Sinica, Nangang, Taipei, 11529, Taiwan Author Fatemi, Seyed Mohammad Reza Department of Marine Science, Science and Research Branch, Islamic Azad University, Tehran, Iran Author Pichon, Michel Queensland Museum, Townsville, QLD, Australia text Zoological Studies 2018 2018-12-17 57 56 1 34 http://dx.doi.org/10.5281/zenodo.5889144 journal article 10.6620/ZS.2018.57-56 1810-522X 12825785 Pavona decussata (Dana, 1846) ( Fig. 4 ) Synonym: Pavonia decussata Dana, 1846; Pavona lata Dana, 1846; Pavona seriata Brüggemann, 1879 . Material examined : Abu-Musa Island ( ZUTC 6583), Sirri Island ( ZUTC 6584). Other Material : Nay-band Bay ( ZUTC 6585), Kish Island ( ZUTC 6586). © 2018 Academia Sinica, Taiwan Description : Color is greenish with some shade of brown. Colony is encrusting at the base from which numerous thick bifacial fronds extending more or less vertically, upper margin of fronds straight or contorted. Corallites arrangement is thamnasterioid and formation by extratentacular budding. Septa arranged in 2 alternating orders, primary septa markedly exert, thick and reaching/ fusing to the columella. Secondary septa less exert, short and sometimes only discerned at the calice rim. Septal margin is smooth, plunging vertically into the calices. Septocostae is well developed, regular, in straight rows alternating in thickness and height. Columella is a single low boss or granule, rod-like, sometimes flattened laterally. Coenosteum reticulated. Fig. 2. Acropora downingi , (a-b) Abu-Musa and Sirri Islands; (c-d) Larak and Hengam Islands; (e-f) close-up of radial and axial corallites. Scale bar = 1 mm. © 2018 Academia Sinica, Taiwan Remarks : In the Persian Gulf, P. decussata displays two colony forms; type 1 ( Fig. 4a ) have a thick bifacial fronds extending more or less vertically with greenish color. In type 2 ( Fig. 4b ), the bifacial frond is not clear and color is whitebrown. Phylogenetic analysis (rDNA region) carried out by authors showed that both mentioned types are monophyletic and well supported (unpublished study). Distribution : Widespread in the Persian Gulf, Red Sea and the Indo-Pacific.