Appendix S1. List of the specimens examined from the collection of the Florida Museum of Natural History (UF). The absence (O) or presence (X) of elements is indicated for each specimen. Information on age and sex were not available for all the specimens; instead, femoral length in mm (FL) is provided as a reference of body size.

Appendix S2. Metric data (lengths in mm) used contrasting the distinct humeral and coracoid scaling and ratios relative to locomotion and ambient (Fig. 7). Crocodylia represents a semi-aquatic condition in comparison with fully terrestrial and aquatic mesoeucrocodylians. Gobiosuchidae is taken as the sister group of Mesoeucrocodylia. CAT, locomotion category (Aq, fully aquatic; SmA, semi-aquatic; T, terrestrial); CL, coracoid length; HL, humeral length, H/C, humeral/coracoid ratio; SIGNAT, specimen signature.

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