Taxonomy & naming
Platydoras brachylecis was described in 2008 by Piorski, Garavello, Arce H. and Sabaj Pérez, with the holotype (MZUSP 43593) collected from Lago dos Viana in the Pindaré-Mearim river system, Maranhão State, Brazil. It belongs to the family Doradidae, the thorny or talking catfishes, a large South American group whose members are armoured with rows of bony lateral plates rather than scales.
The species epithet brachylecis comes from Greek brachy- ("short") and lekis ("plate" or "dish"), a reference to the comparatively shallow midlateral scutes that distinguish it from its close relatives. It sits in the genus Platydoras alongside the far more commonly traded aquarium species usually sold as P. costatus or P. armatulus (the "striped Raphael" complex has itself been repeatedly revised); brachylecis is one of several species split out of that older, broader concept as researchers worked through Amazonian and northeastern Brazilian Platydoras populations. The Catalog of Fishes treats Platydoras brachylecis as a valid, currently recognised species.
Morphology
Like every doradid, Platydoras brachylecis is armoured rather than scaled: a row of bony lateral plates (scutes) runs the length of the body, and the skin elsewhere is naked. This scaleless, plated build means the species is medicine-sensitive in the same way most catfish are — copper-based treatments and many standard medications should be dosed conservatively.
The original description reports specimens ranging from about 1–8.5 in SL, with the primary type series clustered between 111 and 7.5 in SL; the largest recorded individual reaches roughly 8.5 in standard length, a genuinely substantial catfish rather than a nano species. A pale yellow-white stripe runs from above the orbits along the midline of the body to the middle rays of the caudal fin, the field mark used to separate it from close relatives. As in other Platydoras, the pectoral and dorsal fins carry stiff, serrated, locking spines that can be rasped against the pectoral girdle to produce an audible squeak or grunt — the source of the genus's "talking catfish" nickname. Those same spines lock rigid, tangle readily in a net, and can jab a careless hand.
Habitat
Platydoras brachylecis is endemic to river systems of northeastern Brazil, known from the Pindaré-Mearim drainage and associated basins in Maranhão State — separate from the Amazon and Orinoco systems that host most of its Platydoras relatives. The type locality, Lago dos Viana, is a floodplain lake within this coastal-draining river system.
Doradids as a family are tropical South American freshwater fish typically found in warm, soft-to-slightly-acidic lowland rivers and their associated lakes and channels, generally in the range of pH 5.5–7.8 and temperatures around 72–82 °F. Specific limnological data for this species' native water has not been located in available sources; the figures above reflect the family's general habitat and should be treated as a reasonable starting range rather than a site-specific measurement.
Feeding
Platydoras brachylecis is a nocturnal benthic omnivore, foraging over the bottom mainly after dark for aquatic invertebrates, detritus and small prey items, in keeping with the feeding style typical of the genus and family.
No species-specific aquarium feeding notes were found in available sources, but based on the well-documented habits of its close relatives it should take sinking pellets, frozen foods (bloodworm, mysis, chopped prawn) and other prepared foods readily once settled. Because it is a night forager, offering food after the lights go out helps it compete for food against more visually oriented, daytime tankmates.
Mating
No courtship or spawning behaviour has been documented for Platydoras brachylecis in available sources. Reproductive biology in the wild is undescribed for this species.
Breeding
There are no aquarium breeding records for Platydoras brachylecis. Data is sparse for this specific species, and its reproductive mode should not be assumed from other, better-known Doradidae — the family spans several different strategies and this species has not been confirmed to match any of them. As with most thorny catfishes outside the handful of well-studied genera, it should be treated as essentially unbred in captivity until better information emerges.
In the aquarium
Platydoras brachylecis reaches a genuine adult size of roughly 8.5 in standard length, well past "small community catfish" territory — size the tank (and the tankmates) for a large, long-lived bottom-dweller from the outset rather than assuming it will stay small. Like all doradids it is armoured with bony plates instead of scales, so treat it as medicine-sensitive and dose copper-based treatments and other medications conservatively.
Its pectoral and dorsal spines lock rigid and are finely serrated; they tangle easily in aquarium nets and can puncture skin, so it is best captured and moved in a container rather than netted. It is nocturnal and appreciates caves, driftwood or dense cover to retreat into by day, becoming active and foraging after dark. Feed sinking foods in the evening so it isn't out-competed by daytime feeders, and keep the water clean with efficient filtration, as is standard for a heavy-bodied bottom feeder.
Conservation
The IUCN Red List assesses Platydoras brachylecis as Least Concern, per the 2022 assessment. As a species restricted to river systems in Maranhão State, northeastern Brazil, its long-term status is tied to the health of those specific drainages rather than to the vast, better-buffered Amazon basin that shelters most of its relatives; regional habitat pressures in northeastern Brazil (agricultural conversion, water management, deforestation) are the relevant long-term concerns even though the current assessment is not elevated.