Archaeocyathan knowledge base (Cambrian)
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Group : Oblique section
Oblique section
List of descriptors
Shape of cup bulges
Type of folds affecting both walls
Shape of folds affecting both walls
Number of walls
Structure of outer carcass wall (OW/SW)
Structure of inner carcass wall (IW)
Habitus
Central Cavity (or internal if one wall)
Carcass perforations: outer wall or single wall (OW/SW)
Size of carcass pores (OW/SW)
Distribution of carcass pores (OW/SW)
Relationship between rows of carcass pores and intersept (OW/SW)
Shape of carcass canals (OW/SW)
Direction of carcass canals (OW/SW)
Origin of carcass canals (OW/SW)
Relationship between carcass canals and intersept (OW/SW)
Carcass bumps: outer wall or single wall (OW/SW)
Perforation of carcass bumps (OW/SW)
Carcass external plates: outer wall or single wall (OW/SW)
Stipules
Type of morphological tubes (OW/SW)
Carcass perforations: inner wall (IW)
Relationship between rows of carcass pores and intersept (IW)
Relationship between rows of carcass pores and tabulae (IW)
Constitution of carcass canal system (IW)
Building of carcass canals (IW)
Shape of carcass canals zone A (IW)
Porosity of carcass canals zone A (IW)
Relationship between carcass canals zone A and intersept (IW)
Direction of carcass canals zone A (IW)
Shape of carcass canals zone B (IW)
Direction of carcass canals zone B (IW)
Porosity of carcass canals zone B (IW)
Building of carcass perforations (IW)
Carcass external plates: inner carcass wall (IW)
Type of morphological tubes (IW)
Additional sheath
Type of additional sheath (IW)
Type of microporous sheath (IW)
Repartition of bracts on secondary sheath (IW)
Type of sieve (IW)
Type of additional sheath (OW/SW)
Type of microporous sheath (OW/SW)
Repartition of bracts on additional sheath (OW/SW)
Type of mesh (OW/SW)
Type of shieve (OW/SW)
Thorny corolla
Vertical intervallar structures
Type of vertical intervallar structures
Repartition of vertical intervallar structures pores
Porosity of vertical intervallar structures
Pores of vertical intervallar structures
Link between vertical intervallar structures
Repartition of synapticulae
Repartition of pillars
Type of plates
Intervallar cells
Type of Intervallar cells
Tabulae
Building of tabulae
Porosity of tabulae
Chambers
Chambers number
Chambers stack
Other aquiferous unit