Descriptor : Link between vertical intervallar structures

Descriptor type : categorical

Vertical intervallar structures: Longitudinal and often radial structures inside the intervallum (septa, taeniae...).

Intervallum: Space enclosed between the walls.

../images/schema_link.png

Link between vertical intervallar structures

None

../images/SEPTES_ROTUNDOCYATHUS2.png

Missing

Synapticulae

Synapticula (plur. synapticulae): Narrow horizontal rod linking two adjacent vertical intervallar structures.

../images/SYNAPTICULES_AFIACYATHUS2.png

Synapticulae

Plates

Plate: Porous plate linking adjacent radial-longitudinal partitions (septa, taeniae, etc).
NB: Resembles a flat synapticula.

../images/alphacyathus_annularis2.png

Plates

Pillars

Pillar: Longitudinal rodlike structure connecting adjacent tabulae.

Tabula (plur. tabulae): Transverse porous partition linking both walls of a two-walled cup.

../images/pilliers2I.png

Pillars

../images/pilliersI.png

Pillars

Hierarchy

Link between vertical intervallar structures
    |
    |_ Repartition of synapticulae {None , Plates , Pillars}
    |
    |_ Repartition of pillars {None , Synapticulae , Plates}
    |
    |_ Type of plates {None , Synapticulae , Pillars}

Belongs to the groups