The carpometacarpus, a fusion of the central and distal carpal and the metacarpal bones, forms a rigid platform for the attachment of the primary flight feathers.
Dorsal and ventral approaches to the carpometacarpus have been described, but approach will likely depend on whether an open wound is present.
Angel wing (AW) occurs on either or both wings of birds and affects the
carpometacarpus or the joint between the third and fourth metacarpals that twists outward away from body mostly during growth, resulting in wings resembling those of an angel (Grow, 1972; Mildred and Holderread, 1981).
Material--OMNH 74683, proximal end of right
carpometacarpus.
Material: SDNHM 50661, right ulna; 50692, right scapula; 50693-94, left
carpometacarpus; 51621, tip of premaxilla.
To illustrate, in figure 4 I have superimposed on their developmental trajectory the allometric relationship found for the tarsometatarsus (TMT) and
carpometacarpus (CMC) in adults.
2), and TMM 31051-25, a right wing with complete humerus, partial ulna, partial radius, and portion of
carpometacarpus (Fig.
The lateral radiographic image (Figs 1 and 2) revealed a soft tissue swelling around the left carpus and the radiolucency noted, consistent with a nondisplaced oblique fracture of the extensor process of the
carpometacarpus. No other abnormalities were detected.
A small duck is represented by two proximal humeri, two distal coracoids and a
carpometacarpus (SBMNH 752).
Carpus,
carpometacarpus, and phalanges: The primary remiges attach dorsally on the periosteum of the highly flattened platform of the manus.
N % of total Fossil % of total Cranium 1.3986014 1.439393939 Mandible 1.3986014 0.151515152 Vertebrae ** 43.3566434 13.03030303 Coracoid 2.7972028 12.27272727 Furcula 1.3986014 0.833333333 Scapula 2.7972028 5.151515152 Sternum 1.3986014 0 Ribs 19.5804196 0 Humerus 2.7972028 12.04545455 Ulna 2.7972028 11.28787879 Radius 2.7972028 0.75757575758
Carpometacarpus 2.7972028 10.53030303 2nd phalange 2.7972028 1.818181818 Femur 2.7972028 4.696969697 Tibiotarsus 2.7972028 11.21212121 Tarsometatarsus 2.7972028 14.77272727 Fibula ** 1.3986014 0 Hyoid 1.3986014 0 Patella ** 0.6993007 0 100 100 * C/T = carpals/tarsals.