#NEXUS BEGIN DATA; DIMENSIONS NTAX=17 NCHAR=15 ; FORMAT DATATYPE=STANDARD SYMBOLS=" 0 1" MISSING=? GAP=- ; MATRIX Seymouria 000000000000000 Limnoscelidae 110000000000000 Diadectidae 110000000000000 Synapsida 101000000000000 Mesosauridae 101100000000000 Acleistorhinus 101111111000000 Millerettidae 101111111100000 Pareiasauria 101111111111100 Owenetta_kitchingorum 101111111110000 Procolophon_trigoniceps 101111111111000 Odontochelys 101111111111110 Proganochelys 101111111111111 Chelonii 101111111111111 Captorhinidae 101110000000000 Paleothyris 101111100000000 Araeoscelidia 101111000000000 Younginiformes 101111110000000 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;