<p>The family Gliridae contains 28 species in 9 genera. It can be divided into 3 subfamilies: <span class="taxon">Graphiurinae</span> (<span class="taxon"><em>Graphiurus</em></span>); <span class="taxon">Leithiinae</span> (<span class="taxon"><em>Chaetocauda</em></span>, <span class="taxon"><em>Dryomys</em></span>, <span class="taxon"><em>Eliomys</em></span>, <span class="taxon"><em>Muscardinus</em></span>, <span class="taxon"><em>Myomimus</em></span>, and <span class="taxon"><em>Selevinia</em></span>); and Glirinae (<span class="taxon"><em>Glirulus</em></span> and <span class="taxon"><em>Glis</em></span>) (Wilson and Reeder 2005).</p>  <p>The family Gliridae is smaller than it was in the past. More than 30 glirid genera have become extinct since the Eocene (Daams and De Bruijn 1995).<span> (Daams and De Bruijn, 1995; Wilson and Reeder, 2005)</span></p>