Descripteur : Type of vertical intervallar structures

Type du descripteur : categorical

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

Intervallum: Space enclosed between the walls.


Septa

Septum (plur. septa): Planar porous partition linking both walls of a two-walled cup with a radial-longitudinal distribution.

../images/SEPTES_ROTUNDOCYATHUS2I.png

Septa

Pseudosepta

Pseudoseptum: Planar or slightly waved irregularly porous partition linking both walls of a two-walled cup with a radial-longitudinal distribution.

../images/pseudoseptes_sans_pore.png

Pseudosepta

../images/LOCULICYATHUS.png

Pseudosepta

Taeniae

Taenia (plur. taeniae): Intervallar porous structure, non-planar, often dichotomous with a radial-longitudinal distribution.

../images/TAENIAE_PROTOPHARETRA2.png

Taeniae

Pseudotaeniae

Pseudotaeniae: Taeniae with synapticulae at each interpore node.

Taenia (plur. taeniae): Intervallar porous structure, non-planar, often dichotomous with a radial-longitudinal distribution.

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

Dictyonal network

Dictyonal network: Three-dimensional intervallar structure composed by taeniae with tetragonal pores linked by synapticulae at each interpore.

Taenia (plur. taeniae): Intervallar porous structure, non-planar, often dichotomous with a radial-longitudinal distribution.

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

../images/DICTYONAL_DICTYOCYATHUS2I.png

Dictyonal network

../images/dictyocyathus_0001I.png

Dictyonal network


Hiérarchie

Presence of vertical intervallar structures
 |
 |_ Type of vertical intervallar structures

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