170 Years of “Lock-and-Key”: Genital Morphology and Reproductive Isolation
External genital morphology among members of the Drosophila melanogaster species complex. (a) Terminal portion of the male abdomen representative of the four members of the D. melanogaster species complex. Black box denotes the area of male genitalia shown in the scanning electron micrographs presented in panels (b–e). (b) D. melanogaster male, (c) D. simulans male, (d) D. sechellia male, (e) D. mauritiana male. Yellow shading marks the posterior lobe of the genital arch. (f) Female genital morphology representative of members of the D. melanogaster species complex. Scale bars are 100 μm.
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