Fig. 2.

Proportion of monophyletic (white), uni-paraphyletic (where 1 branch within a clade is placed in another genus; light gray), multiparaphyletic (where multiple branches within a clade are assigned to different genera; dark gray), and polyphyletic (black) mammalian and molluscan morphogenera (see Fig. 1 and Methods for details on phyletic state definitions); mollusks are partitioned by marine and nonmarine habitat. The majority of morphogenera surveyed were monophyletic, in proportions significantly greater than expected by chance for all partitions (see Table 1).