<div class="tree_txt_unlinked"><p>The
Hylobatids are the smallest apes, found in Southeast Asia and parts of
Indonesia. While they retain many monkey-like features that in part
bestow on them the title "lesser apes", they are highly specialized in
some anatomical and behavioral aspects. For example, their extremely
long forelimbs relative to their hindlimbs relate to specialized
locomotor styles including a rapid form of brachiation known as
"ricochetal" brachiation. Among the apes, gibbons are the only group
that consistently exhibit ischial callosities, relatively longer lumbar
vertebral column, and no sexual dimorphism.</p>
<p><strong>Citations</strong>: Fleagle 1999, and Geissman 2002</p>
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