Comparison of size distributions of species between the equatorial region and the north and south transitional zones.

<p>Overall, equatorial species are significantly larger than species from the transitional zones, but the direction and magnitude of size differences between regions varies among families. (A) All species. (B) Ozawainellidae. (C) Staffellidae. (D) Schubertellidae. (E) Schwagerinidae. (F) Neoschwagerinidae. (G) Verbeekinidae. Boxes and whiskers as in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0038603#pone-0038603-g002" target="_blank">Figure 2</a>. * <i>p</i><0.05; ** <i>p</i><0.01; *** <i>p</i><0.001. Significance levels of all comparisons are presented in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0038603#pone-0038603-t001" target="_blank">Table 1</a>.