Date: 05 Feb 2009

Genetic Differentiation of Agile Gibbons Between Sumatra and Kalimantan in Indonesia

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The gibbons (Hylobatidae) are a diverse group of small apes that have adapted to the rain forests of South and Southeast Asia and radiated into numerous (12–14) discrete species. Recently, the four subgenera of small apes [Hoolock, (previously Bunopithecus, Mootnick and Groves 2005), Hylobates, Symphalangus, and Nomascus] were all raised to the level of genera because the genetic distances between them indicated by mitochondrial DNA were larger than those between Homo and Pan (Hayashi et al. 1995; Roos and Geissmann 2001). Some aspects of gibbon classification are still controversial, in particular the differentiation of subspecies (Groves 2001; Brandon-Jones et al. 2004; Mootnick 2006; Chatterjee this volume). Accurate determination of collection localities is critical for diagnosing subspecies in this group, which is morphologically very diverse in some physical features (e.g., pelage pattern, Marshall and Sugardjito 1986; Mootnick 2006). Thus it is important to use anima ...