Table 1. Family, sceintific name, and catalog number of specimen or accession to genome resources, for the species included in this study. Names with an asterisk indicate species included in the reduced taxon set. Family Species Voucher Code Ingroup Apteronotidae Adontosternarchus devanziaii LBP19126 Adev Apteronotidae Apteronotus albifrons* LBP16150 Aalb Apteronotidae Apteronotus bonaparti SA028 Abon Apteronotidae Apteronotus rostratus stri-26857 Aros_STRI26857 Apteronotidae Compsaraia samueli IQ02070714 CsaIQ02070714 Apteronotidae Orthosternarchus tamandua* SA057 OtaSA057 Apteronotidae Pariosternarchus amazonensis IQ05100115 PamIQ0510015 Apteronotidae Platyurosternarchus macrostomus LBP49302 Pmac Apteronotidae Porotergus duende IQ02080115 PduIQ02080115 Apteronotidae Porotergus gimbeli SA029 PgiSA029 Apteronotidae Sternarchella calhamazon MCP46987 Scal Apteronotidae Sternarchella raptor IQ04070714 MraIQ04070714 Apteronotidae Sternarchogiton nattereri SA078 Snat Apteronotidae Sternarchorhamphus muelleri SA029 Smue Apteronotidae Sternarchorhynchus roseni VE4837 Sros Gymnotidae Electrophorus electricus RENATO240 Eele Gymnotidae Electrophorus electricus* Gallant et al. 2014. Science Eele_genome Gymnotidae Gymnotus cylindricus LSUMZ1201 GcyLSUMZ1201 Gymnotidae Gymnotus jonasi LBP34047 Gjon Gymnotidae Gymnotus pantanal* LBP32017 Gpan2 Gymnotidae Gymnotus pantherinus LBP37171 GpaLBP37171 Gymnotidae Gymnotus sylvius LBP36021 Gsyl Gymnotidae Gymnotus tigre JSA060406 Gtig Hypopomidae Brachyhypopomus brevirostris* LBP16705 Bbre Hypopomidae Brachyhypopomus occidentalis LSUMZ1849 BoccLSUMZ1849 Hypopomidae Brachyhypopomus occidentalis stri-203 Bocc_STRI203 Hypopomidae Microsternarchus bilineatus LBP34063 Mbil Rhamphichthyidae Gymnorhamphichthys britskii LBP45898 Gbri Rhamphichthyidae Rhamphichthys apurensis LBP43111 Rapu Rhamphichthyidae Steatogenys elegans* SA061 Sele Sternopygidae Archolaemus janae INPA39971 Ajan_INPA39971 Sternopygidae Distocyclus conirostris ANSPt4810 DcoANSP4810 Sternopygidae Eigenmannia cf. trilineata/limbata IQ12040714B EspB_IQ120407148 (Eigenmannia sp. "B", Peru) Sternopygidae Eigenmannia cf. trilineata/limbata VEN4704 EspB_VEN4704 (Eigenmannia sp. "B", Venezuela) Sternopygidae Eigenmannia humboldti stri-6795 Ehum_STRI6795 Sternopygidae Eigenmannia nigra IQ26062014.19 EniIQ26062014 Sternopygidae Eigenmannia vicentespelaea* LBP62040 Evic Sternopygidae Rhabdolichops cf. stewarti LBP41406 Rste Sternopygidae Sternopygus dariensis* stri-14916 Sdar_STRI14916 Sternopygidae Sternopygus macrurus LBP16185 Smac Sternopygidae Sternopygus macrurus LBP46840 SmaLBP46840 Sternopygidae Sternopygus xingu LBP19643 SxiLBP19643 Outgroup Cyprinidae Danio rerio* GCA_000002035.3 Drer_genome Characidae Astyanax mexicanus* GCA_000372685.1 Amex_genome Ictaluridae Ictalurus punctatus* GCA_001660625.1 Ictalurus Loricariidae Pterygoplichthys sp. LSUMZ5750 Psp_5750 Callichthyidae Hoplosternum littorale LSUMZ6522 Hlit_6522