FIGURE 25 in Diptera of the Middle Eocene Kishenehn Formation II

FIGURE 25. Comparison of wing venation of three opetiids. A, Puyehuemyia chandleri Amorim, Silva and Brown; B, Opetia americana Amorim and Greenwalt sp. n. Comparison of landmarks on wing of O. americana, sp. n.: 1. anterior end of Hu at C; 2. tip of Sc at C; 3. tip of R1 at C; 4. tip of R2+3 at C; 5. origin of Radial Sector at bR; 6. anterior end of r-m; 7. fork of M1 and M2; 8. distal end of M1; 9. tip of CuA+CuP. C. Opetia nigra Meigen (modified from Chandler, 2001).