The carpometacarpus is only partially fused. Wrist bones and the metacarpals are fused into a carpometacarpus. Screamers ("Anhimidae") have two large spikes on the carpometacarpus. The wing bones (humerus, radius, ulna, carpometacarpus) were short but robust compared to other pigeons. The wrist of "Confuciusornis" shows fusion, forming a carpometacarpus. Due to the peculiar shape of the carpometacarpus Olson named this species "Porzana astrictocarpus". The bone missing in the latter is the carpometacarpus. The carpometacarpus of the dodo was more robust than that of the solitaire, however. One coracoid measured in length, and one carpometacarpus was long. To non-biologists the carpometacarpus may be best known from buffalo wings.