Rhinopetitia is a small genus of characins (family Characidae) known only from Brazil, where the atlas's two species, R. myersi and R. potamorhachia, are recorded. As with many small Amazonian tetra genera, published biology specific to Rhinopetitia is limited, but the general characin body plan applies: a slender, laterally compressed, silvery-sided fish with a single adipose fin, built for schooling in the current of small to moderate forest streams. Adult size in the atlas ranges from about 1–2 in, placing both species among the smaller South American tetras.
Neither species has an established presence in the aquarium trade, and data on husbandry, diet, or breeding behavior specific to this genus are sparse enough that little can be said with confidence beyond the taxonomic picture. Conservation assessments split between Data Deficient and Least Concern, a pattern typical of small, narrowly documented stream fishes rather than one pointing to a specific threat.