| Calycosiphonia, Aulacocalyx|
Craterispermum is a genus of flowering plants in the Rubiaceae family. It contains 16 species that occur in tropical Africa and Seychelles. It is the only genus in the tribe Craterispermeae, of which the divergence time is estimated at 34.8 million years ago.
The following species are recognized as of May 2014: