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 Acanthastrea echinata (Dana, 1846) ( Fig. 20 ) Synonym: Astrea echinata Dana, 1846; Astrea patula Dana, 1846; Acanthastrea spinosa Milne Edwards & Haime, 1848 ; Acanthastrea hirsuta Milne Edwards & Haime, 1857 ; Acanthastrea brevis Milne Edwards & Haime, 1849 ; Acanthastrea grandis Milne Edwards & Haime, 1849 ; Favia hirsuta ( Milne Edwards & Haime, 1857 ); Favites hirsuta ( Milne Edwards & Haime, 1857 ). Material examined : Abu-Musa Island ( ZUTC 6616). Description : Colony is encrusting to massive with fleshy polyps. Corallites arrangement is cerioid and formation by intratentacular (sometimes marginal) budding. Outline circular to subcircular. Corallites diameter variable (average 10-15 mm ). 24-31 septa in one order and reaching the columella. They are continuous over the wall extending from one corallite to the adjacent ones. Upper septal margin with 3-5 conspicuous, large dentations with acute tips. Septal sides smooth. Columella is compact, a tangle of twisted trabecular. Fig. 20. (a-b) Acanthastrea echinata from Abu-Musa Island; (c) close-up of corallites; (d) septal margin with 3-5 conspicuous. Scale bar = 1 mm. © 2018 Academia Sinica, Taiwan Distribution : Common in the Persian Gulf, Red Sea and Indo-Pacific.