Data for: Phylogenetic structure of body shape in a diverse inland ichthyofauna

Body shape is a fundamental metric of animal diversity affecting critical
behavioral and ecological dynamics and conservation status, yet previously
available methods capture only a fraction of total body-shape variance.
Here we use structure-from-motion (SFM) 3D photogrammetry to generate
digital 3D models of adult fishes from the Lower Mississippi Basin, one of
the most diverse temperate-zone freshwater faunas on Earth, and 3D
geometric morphometrics to capture morphologically distinct shape
variables, interpreting principal components as growth fields. The mean
body shape in this fauna resembles plesiomorphic teleost fishes, and the
major dimensions of body-shape disparity are similar to those of other
fish faunas worldwide. Major patterns of body-shape disparity are
structured by phylogeny, with nested clades occupying distinct portions of
the morphospace, most of the morphospace occupied by multiple distinct
clades, and one clade (Acanthomorpha) accounting for over half of the
total body shape variance. In contrast to previous studies, variance in
body depth (59.4%) structures overall body-shape disparity more than does
length (31.1%), while width accounts for a non-trivial (9.5%) amount of
the total body-shape disparity.