Taxonomy & naming
Leptoancistrus cordobensis was described by the Norwegian-Colombian zoologist George Dahl in 1964. The Catalog of Fishes (Eschmeyer, CAS) treats it as the valid name; because the species was described directly in Leptoancistrus, the authority is cited without parentheses.
The species belongs to the genus Leptoancistrus, within the tribe Ancistrini of subfamily Hypostominae. The genus name joins the Greek leptos, 'slender', with agkistron, 'hook'. The specific epithet cordobensis refers to the Department of Córdoba in northern Colombia, where the type material was collected. The standard modern reference for the genus is Fisch-Muller's 2003 treatment of the Loricariidae-Ancistrinae in the Check List of the Freshwater Fishes of South and Central America.
Morphology
Leptoancistrus cordobensis is a notably small, dwarf loricariid, reaching only about 1.5 in in standard length — among the most diminutive members of the entire family. As in all loricariids, the body bears the characteristic armour of overlapping bony plates and a ventral suckermouth.
Beyond its very small adult size and the slender, hook-toothed build implied by the genus name, detailed colour and patterning data for this species are not well represented in the accessible literature, and the original description by Dahl (1964) remains the primary morphological reference. No account of sexual dimorphism has been published.
Habitat
The species is endemic to northern Colombia, recorded from the upper Sinú River basin and the upper San Jorge River basin, the latter part of the wider Magdalena River drainage, in the Department of Córdoba. It is a strictly freshwater, demersal fish of tropical streams.
As a member of a slender, rheophilic Ancistrini genus, it is associated with the bottom of clear, flowing upland watercourses, clinging to hard substrate in current. Specific water-chemistry measurements from its localities are not published in the accessible sources, so temperature, pH, and hardness values should be regarded as no data published.
Feeding
No dietary study of Leptoancistrus cordobensis has been published. Like other small rheophilic loricariids, it is presumed to graze aufwuchs — the algal and biofilm layer on submerged rock — with its rasping suckermouth. This is an inference from family ecology rather than a documented finding; no gut-content data for this species are available.
Mating
No information on courtship or mating behaviour in Leptoancistrus cordobensis has been published. While many Ancistrini are cave-spawners, no observations specific to this species exist in the accessible literature.
Breeding
There are no published breeding reports for Leptoancistrus cordobensis, in the wild or in captivity. The species is not present in the aquarium trade, and its reproductive mode, fecundity, and any parental care remain entirely undocumented.
In the aquarium
Leptoancistrus cordobensis has no recorded presence in the aquarium hobby. It carries no L-number and no ornamental-trade record on FishBase, so there is no accumulated husbandry experience for the species.
Any speculation about care would rest only on its biology as a tiny, current-loving upland-stream loricariid that would presumably require cool, clean, well-oxygenated flowing water over rock. With no trade specimens and no published husbandry, it is best treated as a species of scientific rather than aquarium interest.
Conservation
The IUCN Red List classifies Leptoancistrus cordobensis as Data Deficient, with the assessment dated 10 October 2014 — meaning the available information is insufficient to evaluate its risk of extinction. Its very restricted known range in the upper Sinú and San Jorge basins, combined with its rarity in collections, makes it potentially vulnerable to localised habitat change. The watersheds of northern Colombia face pressures from agriculture, sedimentation, and hydrological alteration, any of which could affect a narrowly distributed small-stream species; better field data are needed before its status can be reassessed.