TunicataCephalochordataMyxinoideaPetromyzontidaHeterostraciAstraspisEriptychiusArandaspidaAnaspidaJamoytiusEuphaneropsOsteostraciGaleaspidaLoganelliaPituriaspidaJawed_vertebratesConodontaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Donoghue_etal_2000a