FIGURE 20. Ventrites of species of Anchylorhynchus. Retraction of ventrites III–IV is shown in grey. Scales: 500 µm. A A. amazonicus, female. B A. bucki, female. C A. bicarinatus, female. D A. bicarinatus, male. E A. bicolor, female. F A. vittipennis. G A. variabilis, female. H A. variabilis, male.