Corumbataia is a genus of miniature armored catfish in family Loricariidae, subfamily Hypoptopomatinae - the group of small suckermouth catfish that also includes the familiar Otocinclus. It is endemic to Brazil, and the six species the atlas covers are tiny even by that group's standards, running 1–1.5 in as adults. Like its hypoptopomatine relatives, Corumbataia has a flattened, armor-plated body and a ventral sucking mouth used to grip rock in flowing water, feeding on algae and biofilm scraped from stones and wood in the small streams it inhabits.
This is a genus of mostly scientific rather than aquarium interest - its species are small, cryptically marked stream-dwellers that rarely if ever reach the hobby trade, and named localities such as the Rio Tietê (source of the Tietê Cascudinho, C. cuestae) point to a distribution scattered across small, restricted Brazilian drainages rather than one large river system. The conservation picture is a concern for a genus this size: of the six species, one is assessed Critically Endangered and one Endangered, with a further Vulnerable species alongside three of Least Concern, suggesting real pressure on some of these narrow-range headwater habitats from damming, siltation, and land-use change.