plesiomorphic
Adjective
Meaning
(cladistics) Sharing a character state with an ancestral clade; primitive.
plesiomorphous
Source: en.wiktionary.orgSynonyms
Examples
Phenetic methods have become relatively rare in modern times, largely superseded by cladistic analyses, as phenetic methods do not distinguish plesiomorphic from apomorphic traits.
Six of the eight families of the Zingiberales contain taxa specialized for pollination by vertebrates, which appears to be the plesiomorphic state in the order.