Heterohelix_globulosaGuembelitria_cretaceaGuembelitria_trifoliaGuembelitria_danicaGuembelitria_irregularisWoodringina_claytonensisWoodringina_cf_kelleriWoodringina_kelleriWoodringina_hornerstownensisChiloguembelina_waipanensisChiloguembelina_waiparensisChiloguembelina_midwayenensisChiloguembelina_morseiChiloguembelina_tauricaChiloguembelina_crinitaOsteologyMaximum ParsimonyBased on reanalysis of the original matrix.MacLeod_1993aa