Skeletal diagram of the lectotype <b>AMNH 6554</b> of the medium-sized tyrannosauroid <i>Alectrosaurus olseni</i>, known from the Iren Dabasu Formation in Inner Mongolia.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1">[1]</a></sup><sup id="cite_ref-Mader1989_2-0" class="reference"><a href="#cite_note-Mader1989-2">[2]</a></sup> Though a large number of specimens have been referred to this genus, including cranial and hindlimb material from the Bayan Shireh Formation, none of these specimens can be safely attributed as there are no reliable redescriptions and/or analyses.<sup id="cite_ref-Mader1989_2-1" class="reference"><a href="#cite_note-Mader1989-2">[2]</a></sup><sup id="cite_ref-3" class="reference"><a href="#cite_note-3">[3]</a></sup><sup id="cite_ref-4" class="reference"><a href="#cite_note-4">[4]</a></sup><h4><span class="mw-headline" id="Color_Key">Color Key</span></h4>
<ul><li><span style="line-height:1.7;padding:0 .6em;margin-right:-1px;border:1px solid #808080;background: #FFFFFF" title="#FFFFFF"> </span> Known</li>
<li><span style="line-height:1.7;padding:0 .6em;margin-right:-1px;border:1px solid #808080;background: #cccccc" title="#cccccc"> </span> Known but unfigured</li>
<li><span style="line-height:1.7;padding:0 .6em;margin-right:-1px;border:1px solid #808080;background: #777777" title="#777777"> </span> Unknown</li></ul>
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