Figure 5 in Ancestrular morphology in cyclostome bryozoans and the quest for phylogenetically informative skeletal characters

Figure 5. Patterns of protoecial pseudopore distribution represented diagrammatically using simplified drawings of ancestrula in which the pseudopores are shown as small black dots on the protoecium and the aperture of the ancestrula is the black circle at the distal end. The eight recognized patterns are depicted around the circumference of a pie chart showing their relative abundances among 74 species of cyclostomes (51 Recent and 23 fossil).