Russian
примитивность (Of a lineage or taxon) one that is inherited from the common ancestor of a clade (or clade group) and has undergone little change since.
1
They retained that ancestral trait out of pure necessity.
2
Am I to understand that crime is nowadays looked upon as the recurrence of an ancestral trait?
3
Apart from Pinus, most ancestral trait reconstruction relative to fire has been conducted on predominantly Southern Hemisphere clades and this needs to be redressed.
4
There are many curious variations with regard to the inheritance of ancestral traits.