 Chaoyangsaurus is recovered in a more basal position than Psittacosauridae , although Chinnery 's original analysis finds it within Neoceratopsia . Protoceratopsidae is considered to be the sister group of Ceratopsoidea . The fragmentary Asiaceratops was included in these studies and is found to have a variable position , either as a basal neoceratopsian or as a leptoceratopsid , most likely due to the amount of missing information . Removal of Asiaceratops stabilizes the entire cladogram . 
 Chaoyangsaurus is recovered in a more basal position than Psittacosauridae , although Chinnery <a href='null_genetive' title='1'><mark>'s</mark></a>original analysis <a href='uninflect' title='2'><mark>finds</mark></a> it within Neoceratopsia . Protoceratopsidae is considered to be the sister group of Ceratopsoidea . The fragmentary Asiaceratops was included in these studies and is found to have a variable position , either as a basal neoceratopsian or as a leptoceratopsid , most likely due to the amount of missing information . Removal of Asiaceratops <a href='uninflect' title='3'><mark>stabilizes</mark></a> the entire cladogram . 
Chaoyangsaurus is recovered in a more basal position than Psittacosauridae , although Chinnery  original analysis find it within Neoceratopsia . Protoceratopsidae is considered to be da sister group of Ceratopsoidea . The fragmentary Asiaceratops was included in dem studies and is found to have a variable position , either as a basal neoceratopsian or as a leptoceratopsid , most likely due to tdaamount of missing information . Removal of Asiaceratops stabilize thdantire cladogram .