Fig. 3From: Repeated evolution of asymmetric genitalia and right-sided mating behavior in the Drosophila nannoptera species groupThe copulation position of D. nannoptera and D. pachea is asymmetric. Copulation angles of D. pachea couples and of nine related Drosophila species; aca: D. acanthoptera, bro: D. bromeliae, buz: D. buzzatii, mac: D. machalilla, mel: D. melanogaster, moj: D. mojavensis, nan: D. nannoptera, pac: D. pachea, tri: D. tripunctata, wil: D. willistoni. (a,b) Copulation angle at the settling time point (settling, see material and methods) and at the 10% stable copulation time point (10pct), respectively. Stars indicate significant rejection of the null hypothesis: angle = 0 (Table 2, GLM fit angle~species **: p < 0.001, ***: p < 0.0001). Numbers below each boxplot indicate the number of observations. The dashed lines indicate an angle of zero degrees. (c-e) Copulation angles over the course of copulation of D. melanogaster (mel), D. acanthoptera (aca), D. pachea (pac) and D. nannoptera (nan). n indicates the number of observations. Grey lines connect points obtained from the same copulation couple over time. The dashed lines indicate an angle of zero degreesBack to article page