Morphological ontogeny of Oribatula heterochaeta (Acari, Oribatida, Oribatulidae), with comments on some species of Oribatula Berlese

The morphological ontogeny of Oribatula heterochaeta (Feider et al., 1970) is described and illustrated. The larva of this species has 12 pairs of gastronotal setae including h(3) and the nymphs have 15 pairs; most are of medium size and barbed except for short and smooth h(3) in the larva and p(3) in the protonymph and deutonymph. In the larva, the excentrosclerites are present at four pairs of gastronotal setae (c(2), la, lp, h(1)), and in the nymphs at seven pairs (c(2), la, lp, h-series, p(1)). Comparisons of known morphological ontogeny of species in Oribatula are given.