#NEXUS BEGIN DATA; DIMENSIONS NTAX=18 NCHAR=19; FORMAT SYMBOLS= " 0 1" MISSING=? GAP=- ; MATRIX Temnodontosaurus 0000000000000000000 Ichthyosaurus_communis 0000000000000000001 Stenopterygius_quadriscissus 0000000000000000011 Ophthalmosaurus_icenicus 0000000000111111111 Ophthalmosaurus_natans 0000000011111111111 Chacaicosaurus_cayi 0000000000000000111 Brachypterygius_extremus 0000001100000011111 Arthropterygius_chrisorum 0000000000000001111 Mollesaurus_perialus 0000000000001111111 Caypullisaurus_bonpartei 0000110100000011111 Aegirosaurus_leptospondylus 0011001100000011111 Platypterygius_australis 0100110100000011111 Platypterygius_hercynicus 0000010100000011111 Maiaspondylus_lindoei 0001001100000011111 Athabascasaurus_bitumineus 0100110100000011111 Sveltonectes_insolitus 0011001100000011111 Acamptonectes_densus 1000000011111111111 UAMES_3411 1000000001010111111 ; END; BEGIN ASSUMPTIONS; OPTIONS DEFTYPE=unord PolyTcount=MINSTEPS ; END;