Taxonomy & naming
Schizodon corti was described by Leonard P. Schultz in 1944 and placed in the genus Schizodon, one of several anostomid "headstander" genera — alongside Leporinus and Anostomus — within the family Anostomidae, order Characiformes. The Catalog of Fishes (Eschmeyer, California Academy of Sciences) is the governing authority for the valid combination Schizodon corti, and nothing in the available record suggests the name has been revised or synonymised since description.
The genus Schizodon is distinguished from its anostomid relatives chiefly by dentition and jaw structure adapted to grazing rather than active predation. Schizodon corti itself is a narrow-range endemic of the Lake Maracaibo drainage, which sets it apart geographically from most other Schizodon species, which are more broadly Amazonian, Orinocan or Paraná-Paraguay in distribution.
Morphology
Schizodon corti is a large anostomid, with FishBase recording a maximum standard length of 15.5 in — a size that puts it well beyond most home-aquarium headstanders and firmly in "outgrows a typical tank" territory. Like other members of its family it has an elongated, moderately compressed body built for steady cruising and for tilting into the characteristic oblique, head-down grazing posture that gives headstanders their common name.
Detailed morphological description beyond size and family-typical body plan is sparse in the available sources; specific colour pattern, fin counts and diagnostic features distinguishing S. corti from congeners are not covered in the cache and are not asserted here.
Habitat
The species is native to South America, specifically the river systems draining into Lake Maracaibo in Venezuela and Colombia — the type locality for the species. This is a freshwater, benthopelagic tropical fish, occupying the water column near structure and substrate rather than the open water column, consistent with its grazing lifestyle.
Specific water chemistry data (temperature and pH ranges) for the Maracaibo drainage populations is not covered in the cache; keepers and researchers should treat typical warm, neutral-to-slightly-acidic South American lowland river conditions as a reasonable starting assumption rather than a documented fact.
Feeding
Schizodon corti is herbivorous, recorded by FishBase as feeding on fresh leaves and grasses. This fits the broader anostomid pattern of grazing on algae, biofilm and soft vegetation in an oblique, head-down posture, picking material off submerged surfaces and plant growth rather than pursuing live prey.
A plant-heavy, vegetable-forward diet is the clear implication for any captive feeding regime, mirroring the diet of related Schizodon, Leporinus and Anostomus species, which readily strip soft aquarium plants when a suitable grazing diet is not otherwise provided.
Mating
FishBase describes the species' reproductive strategy as a monogamous pair spawner: distinct pairs breed in densely vegetated, weedy areas. Beyond this brief note, courtship behaviour, cues, and any external sexual dimorphism are not documented in the available sources, and none is asserted here.
Breeding
As with most headstanders, Schizodon corti is best treated as an egg-scattering species with no parental care, following the pattern documented for related Anostomidae — pairs spawn among dense weed growth and the eggs are left unguarded. It is rarely, if ever, bred in the home aquarium; the cache contains no report of successful captive breeding for this species specifically, and general anostomid accounts note that only a few Leporinus and Anostomus species have been spawned by hobbyists, with some Leporinus produced commercially on a farmed basis. Breeders should not expect nest-building, mouthbrooding or biparental guarding from this species.
In the aquarium
Schizodon corti's documented maximum size of 15.5 in SL makes it unsuitable for anything but a very large, specialist aquarium — this is not a fish for a standard community tank, and prospective keepers should size accordingly from the outset. Headstanders in general, and Schizodon in particular, carry a well-earned reputation as fin-nippers: aggression toward tankmates and toward their own kind typically increases with maturity, and practical keeping guides for the family recommend either a single specimen or a real group of eight or more to diffuse aggression, never a lone fish paired with just one or two others. Long-finned, slow-moving tankmates such as angelfish are a poor match; medium-to-large peaceful cichlids, robust characins, catfish and plecos are a better fit.
As a grazer, the species should be offered a vegetable-forward diet — blanched greens, algae wafers and similar foods — and keepers should expect it to sample soft-leaved aquarium plants if a grazing diet is not otherwise supplied. Given the scarcity of aquarium-specific documentation for this exact species, keepers should treat it as a large, semi-aggressive specialist fish rather than a beginner community option.
Conservation
The IUCN Red List assesses Schizodon corti as Least Concern, consistent with FishBase's status listing for the species. No further detail on population trend, specific threats, or assessment rationale is available in the cache; the narrow endemic range in the Lake Maracaibo drainage is nonetheless a point of biogeographic interest, since range-restricted freshwater fish are generally more exposed to localised habitat pressures than wide-ranging Amazonian relatives, even when not currently classified as threatened.