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Dive into the research topics where Tomo Takano is active.

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Featured researches published by Tomo Takano.


Primates | 2004

Preliminary analysis of Nacholapithecus scapula and clavicle from Nachola, Kenya

Brigitte Senut; Masato Nakatsukasa; Yutaka Kunimatsu; Yoshihiko Nakano; Tomo Takano; Hiroshi Tsujikawa; Daisuke Shimizu; Miyuki Kagaya; Hidemi Ishida

The Miocene ape Nacholapithecus is known from rather complete skeletons; some of them preserve the shoulder joint, identified by three scapulae and one clavicle. Comparisons made with other Miocene and living apes (Proconsul, Equatorius, Ugandapithecus) suggest that the mobility of the scapulohumeral joint was important, and scapular features such as the morphology and position of the spine and the morphology of the acromion and axillary border resemble those of climbing arboreal primates except for chimpanzees, gorillas, or orang-utans. From the size of the scapula (male Nasalis size), it is clear that the animal is smaller than an adult chimpanzee, but the clavicle is almost as relatively long as those of chimpanzees. Some features closer to colobine morphology reinforce the hypothesis that Nacholapithecus was probably a good climber and was definitely adapted for an arboreal life.


American Journal of Physical Anthropology | 2016

Carpal bones of Nacholapithecus kerioi, a Middle Miocene Hominoid From Northern Kenya.

Naomichi Ogihara; Sergio Almécija; Masato Nakatsukasa; Yoshihiko Nakano; Yasuhiro Kikuchi; Yutaka Kunimatsu; Haruyuki Makishima; Daisuke Shimizu; Tomo Takano; Hiroshi Tsujikawa; Miyuki Kagaya; Hidemi Ishida

OBJECTIVES The carpal bones of the middle Miocene hominoid Nacholapithecus kerioi are described based on new materials. MATERIALS AND METHODS 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. RESULTS 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. DISCUSSION 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.


Primates | 2010

Prenatal ontogeny of subspecific variation in the craniofacial morphology of the Japanese macaque (Macaca fuscata)

Wataru Yano; Naoko Egi; Tomo Takano; Naomichi Ogihara

We cross-sectionally investigated prenatal ontogeny of craniofacial shape in the two subspecies of the Japanese macaque (Macaca fuscata fuscata and Macaca fuscata yakui) using a geometric morphometric technique to explore the process of morphogenetic divergence leading to the adult morphological difference between the subspecies. The sample comprised a total of 32 formalin-fixed fetal specimens of the two subspecies, in approximately the second and third trimesters. Each fetal cranium was scanned using computed tomography to generate a three-dimensional surface model, and 68 landmarks were digitized on the external and internal surface of each cranium to trace the growth-related changes in craniofacial shape of the two subspecies. The results of our study demonstrated that the two subspecies generally shared the same craniofacial growth pattern. Both crania tend to exhibit relative contraction of the neurocranium in the mediolateral and superoinferior directions, a more superiorly positioned cranial base, a more vertically oriented occipital squama, and a more anteriorly positioned viscerocranium as the cranial size increased. However, distinctive subspecific differences, for example relatively narrower orbital breadth, higher orbit, higher position of the nuchal crest, and more protrudent snout found in Macaca fuscata yakui were already present during the prenatal period. This study demonstrated that morphological differentiation in the craniofacial shape may occur at a very early stage of the fetal period even between closely related subspecies of the Japanese macaque.


Journal of Human Evolution | 2004

Nacholapithecus skeleton from the Middle Miocene of Kenya

Hidemi Ishida; Yutaka Kunimatsu; Tomo Takano; Yoshihiko Nakano; Masato Nakatsukasa


Primates | 2003

Comparative and functional anatomy of phalanges in Nacholapithecus kerioi, a Middle Miocene hominoid from northern Kenya

Masato Nakatsukasa; Yutaka Kunimatsu; Yoshihiko Nakano; Tomo Takano; Hidemi Ishida


Journal of Human Evolution | 2003

Definitive evidence for tail loss in Nacholapithecus, an East African Miocene hominoid

Masato Nakatsukasa; Hiroshi Tsujikawa; Daisuke Shimizu; Tomo Takano; Yutaka Kunimatsu; Yoshihiko Nakano; Hidemi Ishida


Journal of Human Evolution | 2012

Functional morphology and anatomy of cervical vertebrae in Nacholapithecus kerioi, a middle Miocene hominoid from Kenya.

Yasuhiro Kikuchi; Yoshihiko Nakano; Masato Nakatsukasa; Yutaka Kunimatsu; Daisuke Shimizu; Naomichi Ogihara; Hiroshi Tsujikawa; Tomo Takano; Hidemi Ishida


Journal of Human Evolution | 2015

Morphology of the thoracolumbar spine of the middle Miocene hominoid Nacholapithecus kerioi from northern Kenya.

Yasuhiro Kikuchi; Masato Nakatsukasa; Yoshihiko Nakano; Yutaka Kunimatsu; Daisuke Shimizu; Naomichi Ogihara; Hiroshi Tsujikawa; Tomo Takano; Hidemi Ishida


Journal of Human Evolution | 2016

Sacral vertebral remains of the Middle Miocene hominoid Nacholapithecus kerioi from northern Kenya

Yasuhiro Kikuchi; Masato Nakatsukasa; Yoshihiko Nakano; Yutaka Kunimatsu; Daisuke Shimizu; Naomichi Ogihara; Hiroshi Tsujikawa; Tomo Takano; Hidemi Ishida


Journal of Human Evolution | 2018

Sexual dimorphism of body size in an African fossil ape, Nacholapithecus kerioi

Yasuhiro Kikuchi; Masato Nakatsukasa; Hiroshi Tsujikawa; Yoshihiko Nakano; Yutaka Kunimatsu; Naomichi Ogihara; Daisuke Shimizu; Tomo Takano; Hideo Nakaya; Yoshihiro Sawada; Hidemi Ishida

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Hidemi Ishida

University of Shiga Prefecture

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Yutaka Kunimatsu

Primate Research Institute

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Daisuke Shimizu

Primate Research Institute

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