 Following Marsh , Ceratopsia has usually been classified as a suborder within the order Ornithischia . While ranked taxonomy has largely fallen out of favor among dinosaur paleontologists , some researchers have continued to employ such a classification , though sources have differed on what its rank should be . Most who still employ the use of ranks have retained its traditional ranking of suborder , though some have reduced to the level of infraorder . 
 Following Marsh , Ceratopsia <a href='been_done' title='1'><mark>has</mark></a> usually been classified as a suborder within the order Ornithischia . While ranked taxonomy <a href='been_done' title='2'><mark>has</mark></a> largely fallen out of favor among dinosaur paleontologists , some researchers <a href='been_done' title='3'><mark>have</mark></a> continued to employ such a classification , though sources <a href='been_done' title='4'><mark>have</mark></a> differed on what its rank should be . Most <a href='null_relcl' title='5'><mark>who</mark></a>still employ the use of ranks <a href='been_done' title='6'><mark>have</mark></a> retained its traditional ranking of suborder , though some <a href='been_done' title='7'><mark>have</mark></a> reduced to the level of infraorder . 
Following Marsh , Ceratopsia done usually been classified as a suborder within da order Ornithischia . While ranked taxonomy done largely fallen out of favor among dinosaur paleontologists , some researchers done continued to employ such a classification , though sources done differed on wat its rank should be . Most still employ tdause of ranks done retained its traditional ranking of suborder , tho some done reduced to the level of infraorder .