#NEXUS BEGIN DATA; DIMENSIONS NTAX=19 NCHAR=22; FORMAT SYMBOLS= " 0 1" MISSING=? GAP=- ; MATRIX Eusthenopteron 0000000000000000000000 Panderichthys 0000000000000000000001 Elginerpeton 0000000000000000000011 Ventastega 0000000000000000001111 Metaxygnathus 0000000000000000001111 Acanthostega 0000000000000000010111 Ichthyostega 0000000000000000110111 Hynerpeton 0000000000000001110111 Greerepeton 0000000000000111110111 Eryops 0000000000011111110111 Balanerpeton 0000000000101111110111 Saxonerpeton 0000000000111111110111 Tulerpeton 0000000001000011110111 Whatcheeria 0000000111000011110111 Crassigyrinus 0000011111000011110111 Westlothiana 0111111111000011110111 Proterogyrinus 1111111111000011110111 Archeria 1001111111000011110111 Caerorhachis 0010101011000011110111 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;