Saurolophus angustirostris
... that though many specimens of Saurolophus angustirostris have been found, it was not clearly differentiated as a separate species from Saurolophus osborni until 2011?
... that though many specimens of <i id="mwAqE"><b id="mwAqI"><a class="mw-redirect" href="./Saurolophus_angustirostris" id="mwAqM" rel="mw:WikiLink" title="Saurolophus angustirostris">Saurolophus angustirostris</a></b></i> have been found, it was not clearly differentiated as a separate species from <i id="mwAqQ"><a class="mw-redirect" href="./Saurolophus_osborni" id="mwAqU" rel="mw:WikiLink" title="Saurolophus osborni">Saurolophus osborni</a></i> until 2011?