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. 2022 Mar 18;8(11):eabl3644. doi: 10.1126/sciadv.abl3644

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Fig. 2. — Theoretical morphospace (B) is built by extending the limits of empirical morphospace (A) and calculating the shape data at each point in a regular 23-by-21 grid. Legend shows symbols and colors for individual taxa from four clades: Sarcopterygii (Sarc.), Chondrichthyes and acanthodians (Chon.), Placodermi (Plac.), and Actinopterygii (Acti.). Blue area in theoretical morphospace represents the extent of empirical morphospace.