JEB -- Walker and Westneat 205 (2): 177 Figure IG1

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Fig. 1. Morphometrics of fin shape. (A) Landmarks used to compute fin area. (B) Spans, S₁=S₆, measured as the length from the base of the fin ray to the tip of the fin rays. (C) Curved chords. The area of the elements, e_j, bounded by the chords was used to estimate the moments of area.