According to A revised, phylogenetically-based concept of Ceropegia (Apocynaceae) by P.V. Bruyns et al., (2017). All genera of the stapeliads are placed in greatly enlarged Ceropegia, However that is not applied yet.
Boucerosia edulis Edgew is a synonym of Caralluma edulis Edgew, in The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 3-3-2019).
Desmidorchis acutangula Dence. is a synonym of Desmidorchis retrospiciens Ehrenb, in The Plant List (2013). Version 1.1. Published on the Internet; http://www.theplantlist.org/ (accessed 3-3-2019).