Corallum flat, medium-sized, composed of exceptionally big elliptic corallites of 3.0—3.3 X 4.0—4.6 mm. In the spots where chains separate, corallites are triangular in contours. At the sides of meshes up to three corallites are placed, but frequently there is only one. Thickness of walls 0.4—0.5 mm. Tabulae horizontal or in places incomplete. Short septal spinules are rarely observed.