Small South American terrestrials out of Brazil, Uruguay and Argentina, and one of the more genuinely obscure theraphosid genera that shows up in the trade with any regularity.
Under three inches, burrowing, drab, and undemanding. Nothing about them is dramatic and nobody keeps one for the appearance.
Honest assessment: published hobby husbandry information on this genus is thin, and most of what circulates is extrapolated from related small South American terrestrials rather than observed. That extrapolation is probably fine, because the requirements across that group are similar, but it should be labeled as extrapolation. Supply is irregular European captive stock and demand rather than production is the limiting factor.