Morphological diversity is often attributed to adaptations to distinct ecological traits. Although biologists have long hypothesized that distinct ecologies drive the evolution of body shape, these relationships are rarely tested across macroevolutionary scales. Here, I examined if locomotor, hunting, and dietary ecologies influenced body shape evolution in carnivorans, a morphologically and ecologically diverse clade of mammals. I found that neither of these ecological factors influenced the evolution of carnivoran body shape and the underlying morphological components that contribute to body shape variation. Instead, the evolution of carnivoran body shape is largely influenced by phylogenetic history, as evolutionary shifts primarily occurred along taxonomically named clade branches. Similar to body size, body shape is a prominent feature of vertebrate morphology that may conceal one-to-one mapping relationships of organismal morphology onto ecological function across macroevolutionary scales. Overall, the results demonstrate that morphological evolution and ecological diversity can be largely decoupled across macroevolutionary scales.