Evolution of Metapostnotum in Flat Wasps (Hymenoptera, Bethylidae): Implications for Homology Assessments in Chrysidoidea
Fig 9
Evolutionary hypothesis about displacement of ph2-ph3 muscles.
Green circle = lateral mesophragmo-metaphragmal muscle (ph2l-ph3); yellow circle = median mesophragmo-metaphragmal muscle (ph2m-ph3); blue ellipse = metaphragmo-second abdominal tergal muscle (ph3-T2); solid line = metapostnotum; double arrow = expansion area; red X = muscles obliteration.