<div class="tree_txt_unlinked"><p>The hoolock gibbon, <em>Hoolock</em>, is distinguished from <em>Hylobates</em>,
primarily by dental characteristics. Specifically, hoolock gibbons
have a larger anterior fovea, a large hypoconulid, and an undeveloped
central basin. <em>Hoolock</em> is additionally distinguished from <em>Symphalangus</em> and <em>Nomascus</em> in having a lower intermembral index, and a low, flat skull vault.</p>
<p><strong>Citations</strong>: Fleagle 1999, and Mootnick and Groves 2005</p>
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