Hoplomyzon is a genus of dwarf banjo catfishes (family Aspredinidae) from northern South America, recorded in the atlas from Venezuela and Ecuador. Like other banjo catfishes, the body is flattened and widened toward the head and narrows into a slender tail, giving the outline that lends the family its common name, and the skin bears bony plates and tubercles rather than scales. The atlas covers 4 species and the genus is exceptionally small-bodied even by banjo-catfish standards, running from roughly 0.5–1.5 in — among the tiniest catfishes recorded in the atlas.
Hoplomyzon has essentially no presence in the aquarium hobby; its members are bottom-dwelling, camouflage-adapted micro-catfish of scientific rather than ornamental interest, and none of the four species carries an established common name or trade history. Conservation status is mixed and worth flagging: the atlas tally includes one Vulnerable species alongside one Least Concern, one Data Deficient and one Not Evaluated, so at least part of the genus is already recognised as facing meaningful risk even though data across the group remain thin.