Billingsella_perfecta_Ulrich_and_Cooper_1936Hepserinia_sinensisRafinesquina_alternataAphanomena_planoconvexaMegamyonia_nitensLeptaena_quadrilateraStrophomena_planumbonaOepikina_limbrataTetraphalerella_hecubaCoolinia_n_sp_A_Dewing_1999Furcitella_nodosaMjoesina_ceresArcheochonetes_primigeniusKjaerina_hartaeTriplesia_anticostiensisOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.Dewing_2004a