FIGURE 4. Hypothesis O4 in Opiliones are no longer the same—on suprafamilial groups in harvestmen (Arthropoda: Arachnida)

FIGURE 4. Hypothesis O4 of phylogeny of the Opiliones (Simon 1879). Simon was the first to define a group that he called Plagiostethi (green), as opposed to the Mecostethi (here represented by Gonyleptes and identical to Thorell's Laniatores). This name as of today has been abandoned in favor of a different usage of the name Palpatores Thorell.