Leptodesma_spinerigumLeiopteria_accranusLeiopteria_actuilarisLeiopteria_auriculataLeiopteria_ausabelensisLeiopteria_bigsbyiLeiopteria_conradiLeiopteria_cornelliLeiopteria_dekayiLeiopteria_gabbiLeiopteria_greeniLeiopteria_laevisLeiopteria_leaiLeiopteria_linguiformisLeiopteria_mitchelliLeiopteria_nitidaLeiopteria_oweniLeiopteria_peninsularisLeiopteria_rafinesquiiLeiopteria_sayiLeiopteria_torreyLeiopteria_troostiOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Rode_2004a