Commentaire : Colonial forming a flattened to massive corallum with corallites typically showing a plocoid corallite arrangement. Corallites 2 to 3.5 mm in diameter. Three orders of laminar septa continuing over the wall as costae and well developed palar structures are typically present. S1 (6 to 8 septa) and S2 (6 to 8 septa) can be equal, or S2 variably shorter than S1. S3 can be up to ¼ the length of S1, or extremely reduced (S1≥S2>S3). S1 always reaches the columella, S2 only if as developed S1. Two crowns of pali (P1-2) (12 - 16 pali in total) are present between S1-2 and the columella. P1 and P2 can be equal or sub-equal and are very variable in width and length. P1-2 flush with, or slightly higher than, the corallite wall upper margin. One or two longer secondary septa can almost reach the columella but these remain devoid of paliform lobes. The columella is always well developed although small and papillose. Minute, regularly spaced septal teeth are arranged along the septum direction. The septa centers of rapid accretion are formed by calcification axes inclining outwards from the centers of rapid accretion axis and producing a granulation pattern on the septal sides. Paddle-shaped septa ornamentation typical of the Merulinidae are absent.
Protection : basse