Taxonomy & naming
Chiloglanis elisabethianus was described by the Belgian-British ichthyologist George Albert Boulenger in 1915. It belongs to the family Mochokidae, the African squeakers and upside-down catfishes, in the genus Chiloglanis — a large group of small, sucker-mouthed rheophilic catfishes distributed across tropical Africa. FishBase and the wider literature treat Chiloglanis elisabethianus as a valid, currently accepted name; it has not been shifted into an older or different combination in the sources consulted here.
The genus name Chiloglanis derives from Greek roots referring to the lip/mouth (cheilos) and glanis, an old term for a catfish — a reference to the enlarged, sucker-like oral disc that defines the genus. The species epithet elisabethianus honours Elisabethville, the colonial-era name (now Lubumbashi) of the city on the river where the type material was collected, tying the name directly to its very restricted home range.
Morphology
Like other Chiloglanis, C. elisabethianus has the compact, dorsoventrally flattened body typical of rheophilic suckermouth catfishes, with an expanded, disc-like mouth on the underside of the head that it uses to grip smooth rock surfaces in current. The skin is naked — Chiloglanis, like most mochokids, has no scales.
Maximum recorded size is only about 2 in total length (FishBase), making this one of the smallest catfishes in the squeaker family and far smaller than better-known genus relatives such as Synodontis. Small, cryptic and rock-clinging, it is easy to overlook in the field and correspondingly poorly documented compared to larger, more widely distributed African catfishes.
Habitat
This species is known only from the Lubumbashi River (part of the upper Luapula/Congo drainage) in Shaba (Katanga) Province, Democratic Republic of the Congo, with an additional record from the upper Luapula River in Kasanka National Park, Zambia. That is an extremely small known range for a fish species — essentially a single river system straddling the DRC–Zambia border.
As a Chiloglanis, it is a rheophilic, current-loving species that clings with its oral sucker to rock and gravel substrate in flowing water rather than living over sand or in still pools. Detailed temperature and pH data specific to this stretch of the Lubumbashi/Luapula system were not available in the sources checked for this article; data sparse. What is documented is that the river forms part of the Congo basin and that the species depends on flowing, presumably well-oxygenated water typical of upper Congo tributaries.
Feeding
Detailed dietary data specific to Chiloglanis elisabethianus were not found in the sources consulted; data sparse. As a small rheophilic mochokid catfish, it almost certainly forages like its genus relatives — grazing biofilm, algae and small invertebrates off rock surfaces in fast water using its sucker mouth, likely most actively after dark, in the manner typical of nocturnal benthic squeakers.
Because the species is not established in the aquarium hobby, there is no aquarium feeding record to draw on. Any captive husbandry would need to replicate its rock-grazing, current-dependent foraging rather than treat it as a generalist bottom scavenger.
Mating
FishBase records the species as oviparous with distinct pairing during breeding, but no further detail on courtship, spawning site or timing was found in the sources checked here; data sparse. No aquarium observations of mating behaviour in C. elisabethianus were located.
Breeding
Beyond the FishBase note that this species is oviparous with distinct pairing, no documented breeding biology — clutch size, egg placement, incubation or parental care — was found for Chiloglanis elisabethianus in the sources consulted; data sparse. Breeding in captivity appears undocumented, and the species is not known to be bred or kept in the aquarium hobby at all. Be honest: this is not a fish with an established home-breeding record.
In the aquarium
Chiloglanis elisabethianus is not an aquarium fish in any practical sense — it is a tiny, range-restricted, Vulnerable species with no documented hobby presence, and this account should not be read as a stocking recommendation. FishBase notes it is harmless to humans and not commercially exploited.
What does carry over from its genus and family is worth noting for context: like other mochokids it is naked-skinned (scaleless) and so would be medication-sensitive, needing conservative dosing of copper-based treatments if ever kept; and Mochokidae in general carry stiff, locking pectoral and dorsal spines that can snag a net, so any handling should use a container rather than a net. As a small, current-dependent rock-grazer it would need strong flow and high dissolved oxygen rather than still water — conditions rarely replicated in typical home aquaria.
Conservation
The IUCN Red List assesses Chiloglanis elisabethianus as Vulnerable (VU). The exact assessment year was not confirmed in the sources checked for this article.
The species' entire known distribution is confined to the Lubumbashi River near the city of the same name in DRC's Shaba (Katanga) Province, plus the upper Luapula River in Kasanka National Park, Zambia — a very small range for a freshwater fish, which is consistent with a Vulnerable listing. It is not targeted by any fishery or aquarium trade, so the relevant conservation pressures are the general threats facing small Congo-basin tributaries: habitat degradation, pollution and land-use change around the Lubumbashi urban area rather than direct exploitation.