<p><i>Triarthrus becki</i>, showing the appendages. According to recent literature the species depicted, even though it is called <i>Triarthrus becki</i> by Beecher himself in the caption, is in fact <i>Triarthrus eatoni</i>.<sup id="cite_ref-LudvigsenTuffnell_1-0" class="reference"><a href="#cite_note-LudvigsenTuffnell-1">[1]</a></sup></p>
<div class="reflist" style="list-style-type: decimal;">
<ol class="references"><li id="cite_note-LudvigsenTuffnell-1"><span class="mw-cite-backlink"><a href="#cite_ref-LudvigsenTuffnell_1-0">↑</a></span> <span class="reference-text"><cite style="font-style:normal"> (1983). "A revision of the Ordovician olenid trilobite <i>Triarthrus</i>". <i>Geological Magazine</i> <b>120</b> (6): 567–577.</cite></span>
</li>
</ol></div>
Compiled by Jesse Earl Hyde, various authors, Beecher
Between 1890 and the mid 1930's
The Jesse Earl Hyde Collection, Case Western Reserve University (CWRU) Department of Geological Sciences <a rel="nofollow" class="external free" href="http://geology.cwru.edu/~huwig/">http://geology.cwru.edu/~huwig/</a>