Fig. 39 in Wing polymorphism in European species of Sphaeroceridae (Diptera)

Fig. 39. Wings of Aptilotus species from Canary Islands. Successive sequence of reduction of veins in wings in particular endemic species. The numbers 2–6 refers to stages of reduction of venation as defined in Fig. 40. A. beckeri (Duda, 1918) from Tenerife, a macropterous species (top wing); A. avolans (Roháček & Papp, 1983) from La Palma (left bottom); A. gomerensis (Papp & Roháček, 1981) from La Gomera (middle bottom); A. franzi (Papp & Roháček, 1981) from Tenerife (right bottom above, stage 5); A. anapterus (Papp & Roháček, 1981) from La Palma (right bottom below, stage 6).