Figure 7: Dendrogram, simplified from the cladistic analysis presented by Stevens et al.1, depicting the relationships of Rusinga’s catarrhine primates to crown catarrhine superfamilies.
From: Remnants of an ancient forest provide ecological context for Early Miocene fossil apes

On the basis of that analysis, both Proconsul and Nyanzapithecus group with the Hominoidea, whereas Dendropithecus and Limnopithecus are stem catarrhines.