Adjective
heterochronic (comparative more heterochronic, superlative most heterochronic)
(biology) Occurring at different times or intermittently.
Clark, G.; Henneberg, M. 'The life history of Ardipithecus ramidus: a heterochronic model of sexual and social maturation'. Source: Internet
In a study that assumes the hominin status of Ardipithecus ramidus, it has been argued the species represents a heterochronic alteration of the more general great ape body plan. Source: Internet