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Appendix S1. Morphological measurements of Uca terpsichores and Uca beebei used in this study.

Figure S1. Outer surface of the major claws of male U. terpsichores (left) and U. beebei (right) showing (A, B) the locations of puncture wounds on the claws we collected from males in the field and (C, D) the approximate points of contact of the dactyl tubercle (light circles) and pollex tubercle (dark circles) when fighting males forcefully contracted their interlaced claws (as seen in video recorded fights).

Figure S2. Apodeme area, a measure of closer muscle cross-sectional area (MCA), in relation to claw length of male U. terpsichores (dark circles) and U. beebei (open circles)

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EVO_12018_sm_AppendixS1.xls94KSupporting info item
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