#NEXUS BEGIN DATA; DIMENSIONS NTAX=6 NCHAR=4 ; FORMAT DATATYPE=STANDARD SYMBOLS=" 0 1" MISSING=? GAP=- ; MATRIX Callichthyidae 0000 Astroblepidae 1000 Hypoptopomatinae 1100 Loricariinae 1110 Hypostominae 1111 Ancistrinae 1111 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;