Prosaurolophus
...that species of Prosaurolophus, a duckbilled dinosaur, have been described by Barnum Brown and Jack Horner, two of the most prominent paleontologists of the 20th century?
...that species of <i id="mwBy4"><b id="mwBy8"><a href="./Prosaurolophus" id="mwBzA" rel="mw:WikiLink" title="Prosaurolophus">Prosaurolophus</a></b></i>, a <a class="mw-redirect" href="./Hadrosaurid" id="mwBzE" rel="mw:WikiLink" title="Hadrosaurid">duckbilled</a> <a href="./Dinosaur" id="mwBzI" rel="mw:WikiLink" title="Dinosaur">dinosaur</a>, have been described by <a href="./Barnum_Brown" id="mwBzM" rel="mw:WikiLink" title="Barnum Brown">Barnum Brown</a> and <a href="./Jack_Horner_(paleontologist)" id="mwBzQ" rel="mw:WikiLink" title="Jack Horner (paleontologist)">Jack Horner</a>, two of the most prominent <a href="./Paleontology" id="mwBzU" rel="mw:WikiLink" title="Paleontology">paleontologists</a> of the 20th century?