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Fig. 2 | BMC Evolutionary Biology

Fig. 2

From: Getting a head in hard soils: Convergent skull evolution and divergent allometric patterns explain shape variation in a highly diverse genus of pocket gophers (Thomomys)

Fig. 2

Methods and analyses summary. Soil data included three indices of conditions contributing to soil hardness: percent clay, bulk density, and linear extensibility (i.e. how much soil hardens when moisture is low); 2D photographs were taken of each specimen a. Landmarks (LMs) and semilandmarks (semi-LMs) were used to capture both homologous points and curves, respectively across the different taxa b. All of our statistical analyses were performed in the R environment using the geometric morphometric package, geomorph ch. The last figure and table present an interpretative summary of the shape with soil type i

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