Figure 1 in Do mismatched genitalia promote mechanical isolation in syntopic species of Phalloceros fishes (Poeciliidae)?

Figure 1. Interspecific differences in genitalia of mature individuals of Phalloceros anisophallos and Phalloceros leptokeras. A, B, ventral views of female urogenital papillae of P. anisophallos (A) and P. leptokeras (B). Notice that the papilla is turned to the right from the perspective of the fish and points somewhat distally towards the tail in P. anisophallos, and is turned to the left and points somewhat laterally in P. leptokeras. C, D, lateral view of the distal portion of the gonopodia with the skin removed of P. anisophallos (C) and P. leptokeras (D). These schematic drawings simply depict the generalized morphologies of the genitalia for each species and thus do not reflect any single museum specimen.