<p>Parthenogenetic lineages are often portrayed as rapid colonizers with short lifespans, but how reproductive mode shapes life-history trajectories in close relatives remains unclear. Using Caucasian rock lizards (<i>Darevskia</i>) as a study system, we compared age structure, growth dynamics, and reproductive traits in the hybrid parthenogenetic lizard (<i>D. armeniaca</i>) and its sexually breeding progenitor (<i>D. valentini</i>). Age was inferred by skeletochronology of phalangeal cross-sections; growth was estimated from distances between successive lines of arrested growth (LAGs). Reproductive traits were integrated from published datasets and re-analyzed. Parthenogenetic lineages tended to show age distributions consistent with earlier maturation, higher reproductive allocation, and shorter lifespan than their sexual relatives. <i>D. armeniaca</i> showed higher reproductive effort relative to body mass, earlier age of maturation, and lower proportion of individuals with long lifespan than its patrilineal progenitor, <i>D. valentini</i> from the same location. Population modeling suggests that the parthenogens would expand faster throughout neighboring habitats than the sexual breeders, which is in line with the observation that they occupy a greater fraction of suitable habitat within their ranges. These differences suggest a demographic mechanism by which unisexual lineages may expand faster, whereas sexual lineages may persist longer under variable conditions, potentially contributing to their long-term coexistence.</p>