cladistics

/kləˈdɪs.tɪks/

IPA: /K L AE0 D AH0 S T IH0 K S/

noun
  1. 1

    An approach to biological systematics in which organisms are grouped based upon synapomorphies (shared derived characteristics) only, and not upon symplesiomorphies (shared ancestral characteristics).

Source: https://en.wiktionary.org/wiki/cladistics