Taxonomy & naming
Platydoras birindellii was described in 2018 by Sousa, Chaves, Akama, Zuanon & Sabaj as a new species of striped Raphael catfish from the Xingu Basin, Brazil, separating Xingu populations from the wider-ranging Platydoras costatus and its relatives. It belongs to the family Doradidae, the thorny catfishes, within the order Siluriformes. The Catalog of Fishes treats Platydoras birindellii as a valid species.
The species has also circulated under the older genus combination Centrochir birindellii in some aquarium references and catalogs — a reminder that Doradidae generic limits have shifted repeatedly and are still being revised. On this site the currently accepted combination, Platydoras birindellii, is used throughout. The genus name Platydoras derives from Greek platys ("flat, broad") and combines with the older doradid root doras; the species epithet honours a researcher associated with Neotropical catfish systematics (the specific etymology is not confirmed from the sources consulted here).
Morphology
Platydoras birindellii is a robust, elongated catfish encased in rows of bony lateral scutes rather than true scales, a hallmark of the Doradidae. The body carries narrow, irregular dark stripes running along a paler background — the pattern that gives striped Raphael catfishes their common name — and the head is broad and flattened, with barbels used to feel out food on the substrate.
As in other doradids, the dorsal and pectoral fins each carry a stiff, serrated spine that the fish can lock rigidly erect; these spines readily snag in an aquarium net and can deliver a painful jab, so the fish is best transferred in a container rather than netted. Reported maximum size is about 7 in total length (FishBase), a genuinely adult-size figure that should guide tank planning rather than being read as a juvenile pet-shop size.
Habitat
The species is known from the Xingu Basin of Brazil, a major clearwater tributary of the Amazon noted for its rocky rapids and associated floodplain lakes. Within this system Platydoras birindellii is associated with rocky rapids habitat as well as quieter floodplain lake margins, and like other Raphael catfish it is thought to burrow into or shelter among soft bottom substrate and cover during the day.
Detailed water-chemistry data for the type locality were not found in the sources consulted here, but Xingu Doradidae generally inhabit warm, tropical South American waters; treat any specific pH or hardness figures for this species as inferred rather than measured until better data is available.
Feeding
Platydoras birindellii is a nocturnal benthic omnivore, foraging over the bottom chiefly after dark for molluscs, crustaceans, insects and detritus, in keeping with the diet documented for the genus. Its barbels let it locate food in the substrate by touch and scent even in low light.
In the aquarium it accepts sinking pellets, frozen foods and other prepared foods readily, along with the occasional snail or other small invertebrate. Because it is most active at night, offering food after the lights go out helps ensure it gets its share rather than losing out to more visible daytime tankmates.
Mating
No courtship or spawning behaviour has been documented for Platydoras birindellii in the sources consulted here; the species was only described in 2018 and its reproductive biology in the wild is essentially unstudied. Doradid catfishes in general are presumed egg-layers with external fertilisation, but specifics for this species — timing, cues, or any pairing behaviour — are simply not known.
Breeding
Breeding has not been documented for Platydoras birindellii, either in the wild or in the aquarium. Data are sparse: eggs are presumed adhesive and no parental care has been reported, consistent with the pattern in related Doradidae, but this should be read as an inference from the wider family rather than an observation of this species specifically. There are no known reports of this fish being bred in captivity, and — as with many doradid catfishes — any commercial supply is very likely wild-collected rather than farmed.
In the aquarium
Give Platydoras birindellii a tank sized to its real adult length of roughly 7 in — this is not a fish that stays small, and a mature specimen needs a correspondingly large footprint with open swimming space plus rock or wood hiding spots for daytime cover. Provide a soft substrate it can rest against or partially bury into, and keep the lighting subdued or offer plenty of shaded retreats, since the species is nocturnal and shy by day.
Two care points follow directly from its biology. First, like other Doradidae it lacks true scales and carries bony plates instead, which makes it more sensitive than scaled fish to copper-based treatments and some medications — dose conservatively. Second, its locking, serrated dorsal and pectoral spines catch in nets and can jab the keeper, so move it with a container rather than a net, and take care when performing maintenance around it. It is generally peaceful toward tankmates too large to swallow, making it a workable if under-documented addition to a robust South American community.
Conservation
The IUCN Red List assesses Platydoras birindellii as Least Concern. As a relatively recently described species restricted to the Xingu Basin, detailed population trend data are limited, but no major range-wide threats have been identified at this time.
The wider Xingu Basin has faced substantial habitat pressure from hydroelectric development (notably the Belo Monte dam), which has altered flow regimes and rapids habitat across the river system; while this species-specific assessment currently stands at Least Concern, the basin's ongoing hydrological changes are a relevant long-term consideration for its rocky-rapids habitat.