The Ranunculaceae Family was named and described by Antoine Laurent de Jussieu in Genera Plantarum in 1789.
Plants of the World Online lists 65 accepted genera in this family commonly referred to as the buttercup or crowfoot family. The Wikipedia article says there are over 2,000 species in 43 genera. I would say they are still working on this family.
The 2013 version of The Plant List named 65 genera with a total of 2,789 accepted species and infraspecific names. It lists a total of 6,690 synonyms and 3,720 names still unresolved. It also listed a number of unresolved genera. Unfortunately, The Plant List is no longer maintained so it is out of date. It does show how much progress is being made reclassifying plants, though.
For more information about this family of plants, please click on the links below. The links take you directly to the information about the family.