Sinopora callosa Klaamann, 1966

Corallum flat, fasciculate, formed of relatively homogeneous corallites of 2.5—3.0 mm in diameter. Calices deep, funnelshaped. Walls of corallites thin at the mouth side — about 0.3—0.5 mm, but thicken about twice in lower parts. Tabulae absent. Septal spinules dense and short; they are best visible in callices where they are placed in more than 20 rows. Where walls are thickened, the spinules are encased in the stereoplasma. Gemmation lateral.