#NEXUS
[!This data set was downloaded from TreeBASE, a relational database of phylogenetic knowledge. TreeBASE has been supported by the NSF, Harvard University, Yale University, SDSC and UC Davis. Please do not remove this acknowledgment from the Nexus file.


Generated on November 12, 2026; 13:40 GMT

TreeBASE (cc) 1994-2008

Study reference:
Mcdonald A.T., & Horner J.R. 2010. "New material of "Styracosaurus" ovatus from the
Two Medicine Formation of Montana." In: , eds. New Perspectives on Horned Dinosaurs.
pp. 156-168. Bloomington, University of Indiana Press.

TreeBASE Study URI:  http://purl.org/phylo/treebase/phylows/study/TB2:S13153]

[ The following blocks are input data for analysis step 9807 ]
BEGIN TAXA;
        TITLE  TaxaForAnalysisStep9807;
        DIMENSIONS NTAX=11;
        TAXLABELS
            Achelousaurus_horneri
            Albertaceratops_nesmoi
            Centrosaurus_apertus
            Centrosaurus_brinkmani
            Chasmosaurinae
            Einiosaurus_procurvicornis
            Leptoceratops_gracilis
            Pachyrhinosaurus_canadensis
            Pachyrhinosaurus_n._sp.
            Rubeosaurus_ovatus
            Styracosaurus_albertensis
            ;
END;

BEGIN CHARACTERS;
[! TreeBASE Matrix URI: http://purl.org/phylo/treebase/phylows/matrix/TB2:M13874]

	TITLE Character_Matrix;
	LINK TAXA = TaxaForAnalysisStep9807;
	DIMENSIONS NCHAR=27;
	FORMAT DATATYPE=Standard SYMBOLS= "0 1 2 3 4" MISSING=? GAP= -;

MATRIX
[                                       10        20        30   ]
[                                        .         .         .   ]
Achelousaurus_horneri           1210113131?111110?101301010
Albertaceratops_nesmoi          11001201001111110?0?11?1010
Centrosaurus_apertus            1000101111311111111114?1010
Centrosaurus_brinkmani          1000102111211111111212?1010
Chasmosaurinae                  10000001000000110?0?10?1010
Einiosaurus_procurvicornis      10001131213111110?101311{01}10
Leptoceratops_gracilis          0???0??0???000000?0?0??0?0?
Pachyrhinosaurus_canadensis     12111??131?111110?111301010
Pachyrhinosaurus_n._sp.         1211113131?111110?111301010
Rubeosaurus_ovatus              1000???1213???110?101311{12}1{01}
Styracosaurus_albertensis       1000101121311111101{01}130121{12}
;
END;

[ The following blocks are output data for analysis step 9807 ]
BEGIN TREES;
      TITLE Analysis_results;
      LINK TAXA = TaxaForAnalysisStep9807;
      TREE Figure_10.5 = [&R] (Leptoceratops_gracilis,(Chasmosaurinae,(Albertaceratops_nesmoi,((Styracosaurus_albertensis,(Centrosaurus_apertus,Centrosaurus_brinkmani)),((Rubeosaurus_ovatus,Einiosaurus_procurvicornis),(Achelousaurus_horneri,(Pachyrhinosaurus_canadensis,Pachyrhinosaurus_n._sp.)))))));
[!  TreeBASE tree URI: http://purl.org/phylo/treebase/phylows/tree/TB2:Tr55686]


END;