MacLeod, N. 1993 The Maastrichtian-Danian radiation of triserial and biserial planktic Foraminifera: testing phylogenetic and adaptational hypotheses in the (micro)fossil record Marine Micropaleontology 21 47-100 Heterohelix_globulosa Guembelitria_cretacea Guembelitria_trifolia Guembelitria_danica Guembelitria_irregularis Woodringina_claytonensis Woodringina_cf_kelleri Woodringina_kelleri Woodringina_hornerstownensis Chiloguembelina_waipanensis Chiloguembelina_waiparensis Chiloguembelina_midwayenensis Chiloguembelina_morsei Chiloguembelina_taurica Chiloguembelina_crinita Osteology Maximum Parsimony Based on reanalysis of the original matrix. MacLeod_1993aa