FIGURE 2. Idealized fenestrate bryozoan illustrating the position of the nine measured characters and their end-member descriptors: Branch Width (BW, narrow vs. wide), Dissepiment Width (DW, narrow vs. wide), Fenestrule Length (FL, short vs. long), Fenestrule Width (FW, narrow vs. wide), Aperture Diameter (AD, small vs. large), Aperture spacing Laterally across Branch (ALB, close vs. distant), Aperture spacing Along Branch (AAB, close vs. distant), Node Diameter (ND, small vs. large), Node Spacing (NS, close vs. distant).