132 



Figs. 1-2: 1: Scheme of ancestral Pterygote wing articulation, wing base and wing venation; the 

 ancestral band of unfused sclerites (P=proxalare, AX=axalare, F=fulcalare, B=basivenale) gave rise 

 to all Recent types of wing articulation and wing base (from Kukalovä-Peck 1983). - 2: Wing 

 articulation and wing base of Neoptera (diagrammatic): a. showing the three axillary sclerites and 

 median plate and their associations with basivenalia; b, showing homologies with the original band 

 sclerites illustrated in Figure 1; c, showing the position of the axillary sclerites in relation to the wing 

 venation (a from Lawrence et al. 1991: b from Kukalovä-Peck 1991: c from Kukalovä-Peck & 

 Lawrence 1993). 



