Body Size Distribution of the Dinosaurs
Figure 4
Frequency distribution of species body size for three major dinosaur clades: (a) Ornithischia; (b) Sauropodomorpha; and (c) Theropoda.
The Sauropodomorpha and Ornithischia are significantly negatively-skewed, while the Theropoda exhibit a bell-shaped distribution (see Table 2). All three clades are best fitted by unimodal distributions.