Southeast Asian, mostly fossorial, and home to the cobalt blue, which has been breaking beginner hearts since the nineties. Absorbed most of the old Haplopelma names, which is why half the listings you find still say Haplopelma lividum.
The cobalt blue's problem is that its color only shows in direct light and it lives at the bottom of a burrow. People buy the photo and receive a hole. Beyond that, the genus runs fast, defensive, and venomous enough to make a bite a genuinely bad week.
The renaming is the market story. Haplopelma listings and Cyriopagopus listings frequently coexist for the same animal at different prices, and the older name often trades for less simply because it reads as outdated to buyers who do not know the two are identical.