#NEXUS BEGIN DATA; DIMENSIONS NTAX=18 NCHAR=24 ; FORMAT DATATYPE=STANDARD SYMBOLS=" 0 1" MISSING=? GAP=- ; MATRIX Psittacosaurus_mongoliensis 000000000000000000000000 Yinlong_downsi 100000000000000000000000 Wannanosaurus_yansiensis 110000000000000000000000 Goyocephale_lattimorei 111100000000000011111110 Homalocephale_calathocercos 111110000000000011111110 Tylocephale_gilmorei 111111000000000001111111 Prenocephale_prenes 111111111100000000111110 Prenocephale_brevis 111111000100000000001100 Hanssuesia_sternbergi 110100000011000000000100 Colepiocephale_lambei 110100000001000100000000 Stegoceras_validum 110100000011000000001100 Pachycephalosaurus_wyomingensis 111111011100110000111111 Alaskacephale_gangloffi 111111011100110000111111 Sphaerotholus_goodwini 111111011100011000111100 Sphaerotholus_buchholtzae 111111011100011000111100 Acrotholus_audeti 111111111100000000111110 Stegoceras_novomexicanum 110100000001000100000000 Amtocephale_gobiensis 111111001100000000011100 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;