part of part of in taxon Anhimidae zone of bone organ uncinate process of ribs A posterior projection from proximal rib segments. Offers attachment sites for respiratory and shoulder muscles as well as adding structural support to the trunk skeleton[Kardong 2012]. WP: Although bony uncinate processes are unique to birds, cartilaginous uncinate processes are present in crocodiles. The uncinate process has also been reported in Sphenodon, Caudipteryx, oviraptorids, Confuciusornis and Chaoyangia however it does not occur in Archaeopteryx AAO:0000741 UBERON:0007843 uncinate process Posteriorly directed process (occasionally directed anteriorly) usually associated with the rib (sometimes with the transverse process) of the third vertebra; they provide the origin of the mm serratus superior, medius, and inferior.[AAO] Wikipedia:Uncinate_processes_of_ribs uncinate process of ethmoid uncinate process of pancreas proximal segment of rib T Alexander Dececchi Christopher J. Mungall