#NEXUS BEGIN DATA; DIMENSIONS NTAX=19 NCHAR=18; FORMAT SYMBOLS= " 0 1" MISSING=? GAP=- ; MATRIX Hypsilophodon_foxi 000000000000000000 Stegoceras_validus 100000000000000000 Archaeoceratops_oshimai 111111000000000000 Bagaceratops_rozhdestvenskyi 111111111100000000 Chaoyangsaurus_youngi 100001000010000000 Centrosaurus_apertus 111111011101100000 Leptoceratops_gracilis 111111000100011100 Graciliceratops_mongoliensis 111111001100000000 Montanoceratops_cerorhynchus 111111000100000100 Protoceratops_andrewsi 111111111100000000 Psittacosaurus_mongoliensis 100011000000000010 Triceratops_horridus 111111011101100000 Udanoceratops_tahizhovi 111111000100011101 Zuniceratops_christopheri 111111011100100000 Liaoceratops_yanzhiguouensis 100111000000000000 Psittacosaurus_sinensis 100011000000000010 IVPP_V12722 100001000010000000 Yamaceratops_gobiensis 101111000000000000 Prenoceratops_peiganensis 111111000100001101 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;