You're right. More info than you wanted. LOL
Atavism
Noun
1. A reappearance of an earlier characteristic.
Date "atavism" was first used: 1833.
Synonyms: reversion (n), throwback (n).
Atavism means a real or supposed evolutionary throwback (degeneracy), the unexpected appearance of primitive traits
I would say your term applies.
Apes, you mean? As in, first 10 min of 2001: A Space Odyssey?