The first capitular joint in primates: Cebidae, Cercopithecidae and Homo.
As for the first capitular joint, Ohman (1986) claimed that a univertebral type is unique to modern and fossil hominids among primates. Stern and Jungers (1990) compiled the data in a wider range of primate and demonstrated as follows. The univertebral type, rather than being unique to hominids, is common among siamang, occurs in an occasional gibbon, and is typical of the larger indriids. We added the data of genera of Cebidae and Cercopithecidae to that observation, and found that the univertebral type is also typical of the Pithecia in Cebidae and Papio and Cercopithecus in Cercopithecidae. We also found that the bivertebral type occurs in 19.4% of Homo. Gloobe and Nathan (1970) had already observed that most mammals have a full facet for the first rib and a hemifacet for the second in the first thoracic vertebra. Accordingly, it seems that Ohman's claim is not applicable for nonhominoid primates and for mammals.
Kimura
K
K
Department of Anatomy, National Defense Medical College, Tokorozawa, Japan.
Konishi
M
M
D000818:Animals; D002427:Cebidae; D002520:Cercopithecidae; D005260:Female; D006801:Humans; D007596:Joints / Q000033:anatomy & histology*; D008297:Male; D012272:Ribs; D013904:Thoracic Vertebrae