Columella type
The overall form of the central
axial structure within a corallite (calical surface)
| Character State | Definition | Illustration |
| spongy | Columella formed by inter mingling of loose trabeculae from the inner septal margins | |
| lamellar | Columella formed by a plate, commonly free in its upper part | |
| papillose | Columella formed by a group of twisted vertical ribbons or rods similar to pali or paliform lobes | |
| feeble | Columella weakly developed | |
Last updated on June 25, 2003-eek.