Phylogenetic tree resulting from the (a) first, (b) second and (c) third analysis. (a) The first analysis includes Frisiphoca aberratum, Frisiphoca affine, Monotherium? wymani and Noriphoca gaudini. 50% majority consensus tree of 29 most parsimonious trees without equal weighting of homoplastic characters. (b) The second analysis includes M.? wymani and N. gaudini. 50% majority consensus tree of 75 most parsimonious trees without equal weighting of homoplastic characters. (c) The third analysis includes M.? wymani and N. gaudini (a). 50% majority consensus tree of 174 most parsimonious trees with equal weighting of homoplastic characters. Frisiphoca aberratum, F. affine, M.? wymani and N. gaudini highlighted in bold. Extinct taxa are indicated by a dagger. All bootstrap values equal to or higher than 50 (after 10 000 replicates) are shown.