Figure 6 in New insights into the six decades of Mesa's hypothesis of chromosomal evolution in Ommexechinae grasshoppers (Orthoptera: Acridoidea)

Figure 6. Schematic representation of two pathways in Ommexechinae L1 autosome evolution. To explain the variable L1 morphology and the distal U2 snDNA location, at least two different inversions must be considered. In the first hypothesis (A), two pericentric inversions are considered, the first one (A1–2) modifying L1 morphology (from acrocentric to submetacentric) and U2 snDNA location (from interstitial to distal), and the second one (A2–3) restoring the acrocentric morphology in P. signata and Cl. bimaculata. The alternative hypothesis involves two different kinds of inversions (B). First, a paracentric inversion changes U2 location without affecting morphology (B1–2) and, then, a pericentric one only changes L1 morphology (B2–3). Both hypotheses are further explained in the paragraph.