jeb12029-sup-0001-FigureS1.pngPNG image35KFigure S1 The relationship between estimated age (millions of years, Ma) for littorinid sister species pairs and similarity in penial form. Spearman r = −0.12, NS.
jeb12029-sup-0002-TableS1-S2-FigS1.docWord document107K

Table S1 Sister-species pairs of Littorinidae and penis similarity, with phylogenetic data and references to distributions and illustrations of penes.

Table S2 Traits scored on the penis (see Fig. 2 in main text for illustrations).

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