Genus Idiothele

One species that matters. I. mira, the blue foot trapdoor baboon, and it builds an actual hinged silk door over its burrow, which nothing else commonly kept does.

That behavior is the entire product. Give it depth and it constructs a lined tunnel with a working lid and ambushes from behind it, which means you will see the spider rarely and the door constantly. Blue tarsi flash when it does emerge.

South African and Mozambican origin, bred reliably in Europe. It arrived expensive and came down on breeding success, the same arc as most African novelty species. Currently sitting about where the difficulty warrants, which is unusual and worth noticing.