Description. Corallum cylindrical, straight to gently curved, tapering towards a broken base. Axial corallite of examined specimen measures 8.1 mm in CD and 48.9 mm in H, and bears 18 secondary corallites. Secondary corallites bud irregularly, usually perpendicular to axial corallite. Calices circular to slightly elliptical (GCD: LCD = 1.00 - 1.1), calicular margin slightly serrated. Specimen examined has two scars of former buds on theca, with secondary corallites rarely exceeding 5 mm in CD. Costae well developed, particularly at calicular margin, corresponding with septa in size. C 1 most prominent, higher costae progressively smaller. Intercostal striae shallow and narrow. Theca thin. Corallum white, with C 1 - 2 having light greenish brown tints. Septa hexamerally arranged in four cycles, the last cycle being incomplete, according to formula: S 1> S 2> S 3> S 4 (46 septa). S 1 most exsert, reaching columella with straight and vertical axial margins. S 2 less exsert and half the width of S 1, also with straight axial margins bearing slender ribbons. S 3 not exsert, 2 / 3 the size of S 2, also bearing ribbons that intermingle with those of S 2. S 4 rudimentary, with sinuous to slightly dentate axial margins. Septa mostly smooth, with growth lines along septal margin, and faint granulation perpendicular to septal margin. Fossa deep, with poorly developed trabecular columella, which is indistinguishable from S 2 and S 3 intermingled slender ribbons.
Sumber: Azooxanthellate Scleractinia (Cnidaria, Anthozoa) from South Africa