Ogihara Naomichi, Almécija Sergio, Nakatsukasa Masato, Nakano Yoshihiko, Kikuchi Yasuhiro, Kunimatsu Yutaka, Makishima Haruyuki, Shimizu Daisuke, Takano Tomo, Tsujikawa Hiroshi, Kagaya Miyuki, Ishida Hidemi
Department of Mechanical Engineering, Faculty of Science and Technology, Keio University, Yokohama, 223-8522, Japan.
Center for the Advanced Study of Human Paleobiology, Department of Anthropology, the George Washington University, Washington, DC, 20052.
Am J Phys Anthropol. 2016 Jul;160(3):469-82. doi: 10.1002/ajpa.22984. Epub 2016 Mar 22.
The carpal bones of the middle Miocene hominoid Nacholapithecus kerioi are described based on new materials.
The materials comprise a trapezoid, three capitates, two hamates, a centrale, a lunate, a triquetrum, and a pisiform, collected during the 2001 and 2002 field seasons from Nachola, Kenya. We also describe a pisiform recently assigned to the type specimen of N. kerioi, KNM-BG 35250.
In the Nacholapithecus wrist, the ulnar styloid process articulates with both the triquetrum and pisiform, and the triquetrum facet on the hamate is relatively proximodistally oriented in dorsal view. The Nacholapithecus capitate possesses a moderate distopalmar hook-like process and separated radial articular facets for the trapezoid and the second metacarpal due to the carpometacarpal ligament attachment that is absent in the Proconsul capitate.
The carpal anatomy of Nacholapithecus is similar to that of the early Miocene hominoid Proconsul. However, Nacholapithecus wrist anatomy appears to exhibit slightly more emphasized stability. Am J Phys Anthropol 160:469-482, 2016. © 2016 Wiley Periodicals, Inc.
基于新材料对中新世中期类人猿纳科拉猿（Nacholapithecus kerioi）的腕骨进行描述。
这些材料包括一块梯形骨、三块头状骨、两块钩骨、一块中央骨、一块月骨、一块三角骨和一块豌豆骨，于2001年和2002年野外考察季在肯尼亚的纳科拉采集。我们还描述了最近归入纳科拉猿模式标本KNM - BG 35250的一块豌豆骨。
在纳科拉猿的腕部，尺骨茎突与三角骨和豌豆骨均相关节，从背侧观察，钩骨上的三角骨关节面在近远侧方向上相对较为明显。纳科拉猿的头状骨具有一个中等大小的掌侧远端钩状突起，并且由于存在腕掌韧带附着，其与梯形骨和第二掌骨的桡侧关节面是分开的，而在原康修尔猿的头状骨中不存在这种附着。
纳科拉猿的腕骨解剖结构与中新世早期类人猿原康修尔猿相似。然而，纳科拉猿的腕部解剖结构似乎表现出更强的稳定性。《美国体质人类学杂志》160:469 - 482，2016年。©2016威利期刊公司。
