Fig. 30From: New insights into the evolution of portunoid swimming crabs (Portunoidea, Heterotremata, Brachyura) and the brachyuran axial skeletonExamples showing character states concerned with the exterior of the 5th pereiopod. A, B Comparison between walking leg-shaped 5th pereiopod (A) and swimming leg-shaped 5th pereiopod (B). Note that character state 43(1) shown here which is concerned with the arrangement of long setae is not necessarily typical of a walking leg, and those concerning merus length (44(1)) and shape of the dactylus tip (49(1)) are not necessarily typical of a swimming leg (see also Figs. 34, 35, and “Characterising the P5-swimming crab morphotype” section). C–F Examples showing character states concerned with the shape of the margin of the proximo-ventral dactylus of the 5th pereiopod (character 48). Note that when the dactylus is adducted (D, E) and the proximo-ventral dactylus margin is convex (or straight) (C), the dactylus is partly immersed in the arthrodial cavity of the propodus (D), while it is not immersed (E) when the proximo-ventral dactylus margin is concave (F). DactMarg proximo-ventral dactylus margin, ImmDact area of the dactylus that is immersed in the arthrodial cavity of the propodus when the dactylus is adductedBack to article page