One species. C. cyaneopubescens, the green bottle blue, and it does more work for the hobby than most entire genera.
Blue legs, orange abdomen, green carapace, and a webbing habit so aggressive that a mature specimen will fill a quarter of its enclosure with silk tunnels within weeks. Arid Venezuelan scrubland animal, so it wants dry substrate and a water dish, not humidity. Fast growing for a New World terrestrial, which is unusual and part of why it is so widely recommended.
Supply is deep and prices have flattened as breeding scaled. The interesting price behavior is at the sling end, where the coloration has not developed yet and buyers discount heavily for an animal that will look completely different in a year.