Figure 8 in Evolution of axial patterning in elongate fishes

Figure 8. Squared-change parsimony traced phylogenies for number of abdominal vertebrae and number of caudal vertebrae. The interrelationships of the seven clades examined are based on Lauder & Liem (1983), and references for the intrarelationships are given in the legend to Fig. 3. Both traces are based on a squared-change parsimony algorithm in MacClade, version 4.06 (Maddison, 1991). Lighter coloured branches (white, yellow) are lower vertebral numbers and darker branches (purple, black) are higher vertebral numbers. Electrophorus electricus was pseudocoloured in the number of caudal vertebrae to allow for greater resolution of the caudal vertebrae trace (see Material and methods). Two nodes are labelled A and B to allow their identification in the text.