Taxonomy & naming
Chiloglanis loffabrevum was described in 2017 by Schmidt, Bart, Pezold and Friel in a large monographic revision of West African Chiloglanis published in Copeia, which erected nine new species in the genus at once. The type material was collected from the Loffa River, Guinea, with the holotype (TU 203492) a male measuring 1 in SL. The species sits in the family Mochokidae, the African squeakers and upside-down catfishes, alongside better-known genera such as Synodontis.
The genus name Chiloglanis combines Greek roots referring to the lip and to a catfish ("glanis"), pointing to the group's defining feature: an oral disc modified into a sucker for clinging to rock in current. The species epithet loffabrevum is a compound coined from the Loffa River — its only known drainage — combined with a Latin qualifier, reflecting the restricted-range naming convention Schmidt and colleagues used across the 2017 revision. As with most recently split Chiloglanis, no older synonym or historical combination exists; it has always been described under this genus.
Morphology
Chiloglanis loffabrevum is a genuinely small catfish, with a maximum recorded standard length of only 1.5 in — among the smallest members of a genus that runs small throughout. Like other Chiloglanis it has a flattened head and a ventral mouth remodelled into a fleshy, muscular sucker disc that grips smooth or rough rock surfaces against strong current, functioning much like the mouth of a hillstream loach or a plecostomus's oral disc, though evolved independently.
The body is scaleless, naked skin over a compact, torpedo-shaped frame built for holding station in fast water rather than for open swimming. As in other mochokids it carries stiff, serrated spines at the leading edge of the dorsal and pectoral fins that lock erect — a genuine hazard in a hand net and a detail worth remembering even at this small size. Precise colour pattern for this species is not detailed in the sources reviewed; congeners are typically mottled brown-grey, camouflaged against rock and gravel.
Habitat
This species is endemic to the upper Loffa River drainage in Guinea, West Africa, a single-country, single-river system range that makes it one of the most geographically restricted Chiloglanis described. It lives in small streams and rivers with moderate to swift flow, over substrates of gravel and woody debris rather than mud or sand — classic sucker-mouth catfish habitat, chosen for oxygen-rich, well-aerated water and a food supply of algae and biofilm growing on stable, current-washed surfaces.
Detailed water chemistry for the Loffa drainage itself has not been published for this species specifically, but Chiloglanis as a genus is characteristic of fast-flowing hilltop and highland streams, generally soft to neutral in chemistry and cool relative to lowland rivers. This is emphatically a running-water fish, not a still-water or blackwater species, and its narrow range leaves it with essentially no buffer against habitat change.
Feeding
Chiloglanis loffabrevum is a nocturnal benthic omnivore and grazer, foraging mostly after dark over current-swept rock and wood for algae, biofilm, aufwuchs and small invertebrates, in keeping with the diet described for the genus generally. Its sucker mouth is built to hold position on a rock face while it rasps at the growth on the surface, rather than to chase prey in open water.
In the aquarium, genus care notes describe Chiloglanis as accepting small live and frozen foods such as daphnia, brine shrimp and bloodworm, along with vegetable matter like blanched cucumber, in addition to whatever algae is available to graze. Because it is a night forager, offering food after lights-out helps ensure a fish this small and retiring is not out-competed by more assertive tankmates.
Mating
No courtship or spawning behaviour has been documented for Chiloglanis loffabrevum specifically, and detailed accounts are sparse for the genus as a whole. Mochokid catfishes in general are not known for elaborate pair-bonding or nest construction; most Chiloglanis and related small mochokids are presumed to be egg-scatterers or cavity spawners in fast-flowing water, but this has not been confirmed for this species and should not be assumed.
Breeding
There is no published record of Chiloglanis loffabrevum breeding in the aquarium, and given how recently it was described (2017) and how restricted its range is, it has almost certainly never been kept or bred in captivity at all. As a genus, Chiloglanis is not among the mochokids regularly home-bred — unlike the brood-parasitic Synodontis multipunctatus, most squeakers in this family either scatter eggs with no parental care in their native fast-flowing streams or have breeding behaviour that remains unrecorded. For this species, breeding in captivity should be considered essentially unachieved and undocumented; any claim otherwise would be unfounded.
In the aquarium
Chiloglanis loffabrevum is not established in the aquarium trade — it is a narrow-range, recently described species with no meaningful hobbyist history, and specimens are not known to be commercially collected or exported. Anyone encountering it would need to replicate its wild habitat closely: strong, well-oxygenated current (a powerhead is typically recommended for the genus), a substrate of fine gravel or sand, smooth rocks and driftwood offering current-breaking cover and grazing surfaces.
Even at a maximum size of 1.5 in this is not a fish to treat carelessly. Like other mochokids it is scaleless and therefore medication-sensitive — copper-based treatments and many standard medications should be dosed conservatively, as with loaches, puffers and eels. It also carries locking, serrated dorsal and pectoral spines that can snag a net and jab the handler, so it is safer moved in a container than netted. Given the total absence of husbandry data, this is a species for a specialist keeper working from first principles and genus-level care, not a beginner purchase — and given its Endangered status, any specimen in the trade should raise questions about wild collection from an already threatened, single-river population.
Conservation
The IUCN Red List assesses Chiloglanis loffabrevum as Endangered (2020). Its entire known range is the upper Loffa River drainage in Guinea — a single threat-based location — giving it a naturally restricted extent of occurrence with no redundancy if that habitat is degraded.
The assessment cites continuing habitat decline driven by deforestation, agricultural expansion, pollution and small-scale mining within the drainage, with no known conservation actions currently in place and no assessed population trend data. As a micro-endemic entirely dependent on one river system, this species has essentially no capacity to withstand sustained habitat pressure, and its conservation outlook rests entirely on the fate of the Loffa River watershed.