#NEXUS BEGIN DATA; DIMENSIONS NTAX=7 NCHAR=3 ; FORMAT DATATYPE=STANDARD SYMBOLS=" 0 1" MISSING=? GAP=- ; MATRIX Casea 000 Varanops 100 Aerosaurus 100 Ophiacodon 110 Edaphosaurus 111 Dimetrodon 111 Sphenacodon 111 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;