Trait data for simulated shape warps of turtle humeri used to study the morphological evolution of turtles in Dickson and Pierce (2019). The morphospace was defined by a geometric morphometric analyises of 1028 psuedolandmarks on 40 turtle humeri. Hypothetical shape warps were then produced on a 4x6 grid accross morphospace. For each shape warp, four functional traits were measured, corresponding to a locomotory performance trait: stress under simulated load (strength), bone curvature (stride length), muscular mechanical advantage (mechanical advantage), and frontal area (hydrodynamics).
data("warps")A data frame with 24 observations on the following 6 variables.
xthe first axis of shape variation as determiend by a between-groups principal components analysis of the turtles dataset
ythe second axis of shape variation as determiend by a between-groups principal components analysis of the turtles dataset
hydrohydrodynamics
curvestride length
mechmechanical advantage
feastrength (assessed using finite element analysis)