Taxonomy & naming
Rineloricaria atratoensis was described in 2024 by Castellanos-Mejía, Londoño-Burbano, Ochoa, García-Alzate and DoNascimiento. The species epithet refers to the Atrato River, the type locality, which drains the Caribbean and Pacific slopes of northwestern Colombia.
The genus Rineloricaria belongs to subfamily Loricariinae — the whiptail catfishes — one of the major lineages within the armoured-catfish family Loricariidae. It is among the most species-rich loricariine genera, with members distributed widely across South America. As a very recently described species, R. atratoensis has not yet been assigned an L-number, and detailed comparative and phylogenetic placement beyond the original description has not been published.
Morphology
No detailed morphological summary is available outside the original 2024 description, which is not part of this dataset. In general terms, Rineloricaria are slender, dorsoventrally flattened loricariines with an elongate, tapering body and a long, thread-like caudal peduncle — the 'whiptail' form. The body is sheathed in rows of bony plates, and the ventrally positioned suckermouth bears the rasping dentition typical of the family.
Species-specific measurements, plate counts, and colour-pattern details for R. atratoensis are not reproduced here; they should be taken from the original description. Maximum size has not been published in the sources available.
Habitat
Rineloricaria atratoensis is recorded from the Atrato River basin in northwestern Colombia. The Atrato is a large, high-discharge river draining the humid Chocó region — one of the wettest areas on Earth — and emptying into the Gulf of Urabá on the Caribbean coast.
The species is described as freshwater, demersal (bottom-associated), and tropical, consistent with the whiptail habit of resting on sand, gravel, leaf litter and submerged wood in flowing water. Specific microhabitat, depth, and water-chemistry data for this species have not been published in the available sources.
Feeding
No feeding data specific to Rineloricaria atratoensis has been published. Loricariines of the genus Rineloricaria are generally bottom-grazing omnivores that rasp biofilm, algae and associated micro-invertebrates and detritus from hard surfaces using their suckermouth dentition. Whether this species departs from that general pattern is not documented.
Mating
No courtship or mating behaviour has been documented for Rineloricaria atratoensis. The species is too recently described, and there are no aquarium observations to draw on.
Breeding
No breeding data is available for Rineloricaria atratoensis. Many whiptail catfishes are cave- or crevice-spawners in which the male guards a clutch of adhesive eggs, but no spawning observations for this species have been published, and it is not known in captivity.
In the aquarium
Rineloricaria atratoensis has no documented presence in the aquarium hobby. As a 2024-described species from a single Colombian river basin, it has not entered the ornamental trade, and no husbandry, captive-care, or breeding information exists for it.
Conservation
Rineloricaria atratoensis has not been evaluated by the IUCN Red List (status Not Evaluated). This is expected for a species described in 2024 — formal assessment typically lags description by years. Its conservation needs are unknown. The Atrato basin faces pressures from alluvial gold mining, deforestation and sedimentation, which are recognised threats to its aquatic fauna generally, but no species-specific assessment of risk to R. atratoensis exists.