Dasyloricaria is a genus of whiptail catfish in the pleco family Loricariidae, subfamily Loricariinae, found in flowing rivers and streams of Colombia, Panama and Venezuela. The atlas's 3 species (D. filamentosa, D. latiura, D. paucisquama) are among the larger whiptails, reaching 8–14 in, and share the subfamily's elongated, dorsoventrally flattened, bony-plated body with a ventral sucker-mouth for grazing algae and biofilm from rocks and wood in current. As the common name of D. filamentosa and the genus name itself suggest, males of at least some species develop long filamentous extensions to the caudal fin, a trait shared with several other loricariine genera.
Dasyloricaria is seen only occasionally in the aquarium trade, generally through specialist pleco importers rather than general fish outlets, and requires strong current and a large footprint given its size at maturity. Conservation status is mixed across the genus: one species is Least Concern, one Near Threatened, and one has not yet been formally assessed, reflecting how unevenly surveyed these rheophilic whiptail catfish are across their range.