Smithstura is a genus of small stream loaches distributed across mainland Southeast Asia and into southern China - the atlas records it from China, Laos, Myanmar, Thailand, and Vietnam. It belongs to the broad Cobitoidea loach radiation that fills the region's fast-flowing hill streams, and its species are small and slender-bodied, with atlas records converging on roughly 3 in.
Data are sparse for this genus beyond basic taxonomy and distribution: it has little to no presence in the aquarium hobby, and detailed accounts of diet or breeding behaviour are not well documented in the sources available here. Conservation status is mostly unassessed, matching the brief's tally of 2 Not Evaluated and 1 Least Concern.