 Brenda Chinnery , formerly of the Museum of the Rockies in Bozeman , Montana , independently described Prenoceratops in 2005 and published a new phylogeny . In 2006 , Makovicky and Mark Norell of the AMNH incorporated Chinnery 's analysis into their own and also added Yamaceratops , although they were not able to include Yinlong . The cladogram presented below is a combination of Xu , Makovicky , and their colleagues ' most recent work . 
 Brenda Chinnery , formerly of the Museum of the Rockies in Bozeman , Montana , independently described Prenoceratops in 2005 and published a new phylogeny . In 2006 , Makovicky and Mark Norell of the AMNH incorporated Chinnery <a href='null_genetive' title='1'><mark>'s</mark></a>analysis into their own and also added Yamaceratops , although they <a href='negative_concord' title='2'><mark>were</mark></a> <a href='negative_concord' title='3'><mark>not</mark></a>able to include Yinlong . The cladogram presented below <a href='drop_aux' title='4'><mark>is</mark></a>a combination of Xu , Makovicky , and their colleagues <a href='null_genetive' title='5'><mark>'</mark></a>most recent work . 
Brenda Chinnery , formerly of the Museum of the Rockies in Bozeman , Montana , independently described Prenoceratops in 2005 and published a new phylogeny . In 2006 , Makovicky and Mark Norell of the AMNH incorporated Chinnery  analysis into their own and also added Yamaceratops , although they ain't able to include Yinlong . da cladogram presented below a combination of Xu , Makovicky , and their colleagues  most recent work .