Titlebook: Evolution of Gibbons and Siamang; Phylogeny, Morpholog Ulrich H. Reichard,Hirohisa Hirai,Claudia Barelli Book 2016 Springer Science+Busines

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Equality, Citizenship, and Segregationthe thumb when transporting small objects during travel (carrying food) and when engaging in fine-tuned motor movements. Their frequent use of the thumb alone to pick, probe, and investigate objects indicates that the thumb is of vital importance to hylobatids and is most often employed as a sensory

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Nelarine Cornelius,Larraine Gooch,Shaun Toddtween tool and goal object were not physically situated in the task layout, gibbons performed poorly. This is unexpected given the taxonomic position of the Hylobatidae and their level of cortical development. However, given their unique socio-ecological adaptations, this may reflect differences in

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Equality, Participation, Transition thought to be limited to few facial and gestural signals, and their socio-cognitive skills are expected to be rather modest in comparison to great apes that live in socially more complex groups. Research into hylobatid communication largely focused on their songs, with increasing evidence for intra

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The Evolution of Gibbons and Siamangs back to the beginning of the middle Miocene about 16.2 mya, a critical time when ape and human ancestors greatly diversified and when hominoids had left the African continent for the first time. The early Miocene was a warm period with equatorial forests expanding northward allowing early hominoid

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Locomotion and Posture in Ancestral Hominoids Prior to the Split of Hylobatidsevolution of large body size, are considered hallmarks of hominoid evolution. These features are thought to have played an important role in the Old World monkey-ape divergence and the development of upright bipedal locomotion in our own lineage. Compared to early theorists, who considered hylobatid

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Hylobatid Evolution in Paleogeographic and Paleoclimatic Contexto nearly the end of the Oligocene. A profound event in the area’s history was the joining of the Afro-Arabian and Eurasian tectonic plates in the early Miocene, which enabled for the first time in history substantial exchanges of flora and fauna across the .. The warm and humid climate of the Eocene

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