Corallite structure is different.M.amakusensis had ceriod,angular corallites that are of even height on the corallum.The skeletal pics of the corallites look very neat and organized compared to A.lordhowensis.A.lordhowensis also has ceriod corallites,they are compressed and the walls are sharp,septa are alot thicker too.Some of the corallites are raised/higher than the rest of them on the colony as well.