#NEXUS BEGIN DATA; DIMENSIONS NTAX=20 NCHAR=35; FORMAT SYMBOLS= " 0 1" MISSING=? GAP=- ; MATRIX Aneurophyton 00000000000000000000000000000000000 Archaeopteris 00000000000000000000000000000000001 Early_Carb_lygonopterids 00000000000000000000000000000000011 Higher_lygonopterids 00000000000000000000000000000000111 Medullosa 00000000000000000000000000000011111 Callistophyton 00000000000000000000111111111101111 Glossopteridales 00000000000111111111000111111101111 Peltaspermum 00000000001000111111001111111101111 Corystospermaceae 00000000010001001111010000011101111 Caytonia 00000000100111111111000111111101111 Cycadales 00000000001011010011000001101111111 Bennettitales 00000111100111111111000111111101111 Pento_ylon 00001011100111111111000111111101111 Euramerican_cordaites 00010000010000000101110010110101111 Ginkgoales 00110000010000000101110010110101111 Coniferales 00110000010000000101110010110101111 Ephedra 01001111100111111111000111111101111 Welwitschia 11001111100111111111000111111101111 Gnetum 11001111100111111111000111111101111 angiosperms 00000001100111111111000111111101111 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;