The morphological ontogeny of Tectoribates ornatus (Schuster, 1958) based on specimens from Romania is described and illustrated. The juveniles of this species are plicate, unideficient and apheredermous, with leaf-like prodorsal setae in and le and most gastronotal setae. The larva has sclerites on the gastronotum, and some of them bear setae. In the juveniles, seta d is present at solenidion σ on genua I–III, φ₁ on tibia I and φ on other tibiae, but this seta is lost in the adult. In the nymphs, seta d on all femora and seta l′ on genu and tibia I are leaf-like.