#NEXUS BEGIN DATA; DIMENSIONS NTAX=18 NCHAR=18; FORMAT SYMBOLS= " 0 1" MISSING=? GAP=- ; MATRIX Eusthenopteron 000000000000000000 Panderichthys 000000000000000001 Elginerpeton 000000000000000011 Ventastega 000000000000001111 Metaxygnathus 000000000000001111 Acanthostega 000000000000010111 Ichthyostega 000000000000110111 Hynerpeton 000000000001110111 Greerepeton 000000000111110111 Eryops 000000011111110111 Balanerpeton 000000101111110111 Saxonerpeton 000000111111110111 Tulerpeton 000001000011110111 Whatcheeria 000011000011110111 Crassigyrinus 000111000011110111 Westlothiana 011111000011110111 Proterogyrinus 111111000011110111 Archeria 101111000011110111 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;