Table 5. Inverse relationships among characters for variation among genera. Summary from Table 4, with characters illustrated in Figure 2.

 
Principal Component Axis
Among Genera Potential inverse relationships shown across columns for each PCA
 
PCA-1
All characters large
All characters small
 
 
PCA-2
Aperture spacing
Aperture Diameter (AD)
 
Along Branch (AAB)
Dissepiment Width (DW)
 
 
PCA-3
Node Diameter (ND)
Fenestrule Length (FL)
 
Aperture spacing
Node spacing (NS)
 
Along Branch (AAB)
Fenestrule Width (FW)
 

 
Aperture Diameter (AD)
 
 
PCA-4
Node Diameter (ND)
Branch Width (BW)
 
Node spacing (NS)
Dissepiment Width (DW)
 
Aperture Diameter (AD)
 
 
PCA-5
Aperture Diameter (AD)
Dissepiment Width (DW)
 
Aperture spacing Laterally
Aperture spacing
 
across Branch (ALB)
Along Branch (AAB)
 
Node Diameter (ND)