Taxonomy & naming
The French aquarist and cichlid worker Henri Allgayer described this fish in 2001, placing it in the genus Cryptoheros. The type material came from the Río Cañaveral (Río Caño) in Bocas del Toro Province, on the Atlantic slope of western Panama. The epithet joins the Latin altus, 'high', to flavus, 'yellow' — for the bright colour ripe and displaying fish carry high on the body. Like the other dwarf convicts, the species has moved between generic homes: described in Cryptoheros, later treated under Archocentrus, and now placed in Amatitlania. That placement follows Schmitter-Soto's 2007 revision of Archocentrus (Zootaxa 1603), which erected the genus Amatitlania, and the broader Říčan, Piálek, Dragová and Novák revision of the Middle American cichlids (Vertebrate Zoology 66, 2016). The boundaries among these small convict genera are still debated, and some authors keep the species in Cryptoheros. Eschmeyer's Catalog of Fishes lists it as valid as Amatitlania altoflava (Allgayer, 2001), and FishBase follows.
Morphology
Amatitlania altoflava is a small cichlid, reaching roughly 3.5 in in standard length (FishBase). It has the compact, oval convict body and a pale grey to bluish ground crossed by the dark vertical bars typical of the group. The feature the name records is a bright yellow wash set high on the flanks of ripe and displaying fish — more extensive than the lower-belly yellow of some of its relatives. The bars darken or fade with mood and breeding state, and the fins carry a soft iridescent sheen. Because the species is known mainly from Allgayer's original description and a limited body of aquarium and museum material, the published account of its fine morphology is modest; the characters that separate it from its congeners rest on technical features in the description rather than on a single obvious external badge. Sexual dimorphism is presumed to follow the usual convict pattern — males larger with longer, more pointed unpaired fins, females smaller, rounder and often most strongly coloured in breeding condition — but where the literature does not document the detail, that is stated rather than invented.
Habitat
The species comes from the Atlantic (Caribbean) slope of western Panama, in the Río Cañaveral and neighbouring drainages of Bocas del Toro; FishBase places it broadly on the Atlantic slope of Panama. These are warm, clear to slightly stained lowland rivers and creeks of moderate to slow current, running over sand, gravel and leaf litter, with submerged wood and rock giving cover and spawning cavities. FishBase characterises it as a benthopelagic tropical freshwater fish. Specific temperature and pH ranges are not well published for the species itself, but its lowland Caribbean-Panama setting implies the warm, soft, near-neutral to mildly acidic water typical of the region. Its range falls within the Atlantic-slope freshwater fauna of lower Central America — broadly the Caribbean-Panama, or Chiriquí, freshwater province.
Feeding
Amatitlania altoflava feeds as a small benthic omnivore, in the manner of its dwarf-convict relatives. It works over and through the bottom for small invertebrates and insect larvae, and gleans algae, fine plant matter and detritus from stones, wood and the substrate — an adaptable gleaner rather than a predator or a specialist. No dedicated dietary study of the species has been published, so this account draws on the genus and on aquarium experience rather than on a stomach-contents analysis of altoflava itself. In captivity it takes prepared and live foods readily, in keeping with the omnivory of the group.
Mating
The high-yellow convict is a monogamous, biparental, pair-bonding cave-spawner, like the rest of its genus. A male and female pair off and together choose and defend a cavity — a crevice among stones, a hollow under wood, or, in the aquarium, a cave or pipe. They go through the familiar cichlid courtship of lateral display, fin-spreading and shared cleaning of the spawning surface, the female's deepening colour signalling that she is ready. Aggression sharpens around the chosen cave during breeding, but for so small a fish the territorial demands stay modest beside those of the larger Central American cichlids. Close observation of courtship in this particular species is limited, so the account rests largely on the consistent behaviour of its near relatives.
Breeding
Amatitlania altoflava is a biparental cave-spawner that has been bred in the hobby on a small scale. The adhesive eggs are laid on the inner wall or roof of the chosen cavity and tended chiefly by the female, who fans and mouths the clutch while the male defends the territory. In keeping with the fish's small size the broods are modest — on the order of a hundred eggs or fewer — though precise published fecundity is scant, so the figure is offered as an order of magnitude rather than a documented count. The eggs hatch within a few days at warm temperatures; the wrigglers are moved to pits, and once free-swimming the fry are led out and guarded as a school by both parents. Parental care is extended and attentive, the hallmark of the convict group.
In the aquarium
This is a niche aquarium fish — kept occasionally by specialists in small Central Americans for its colour and dwarf size, but never a mainstream trade fish. A pair can be kept and bred in a modest tank.
Tank: around 20–30 US gal for a pair. Mirror the home stream with a soft substrate of sand and fine gravel, rounded stones and bogwood arranged into caves and broken sight-lines, leaf litter, and one or more dedicated spawning caves such as an inverted flowerpot or a short pipe. Hardy plants generally survive a pair's modest digging.
Water: track warm, soft-to-moderate, near-neutral to mildly acidic Caribbean-Panama lowland streams — temperature around 75–82 °F and pH roughly 6.5–7.5, with good filtration and regular water changes.
Food: easy. A small omnivore takes quality flake and small sinking pellets, with frozen and live invertebrates (daphnia, brine shrimp, small bloodworm) and a little vegetable matter to condition breeders.
Tankmates: keep to calm, similarly sized fish. Like the other dwarf convicts it can be bullied by larger, pushier cichlids, so a dedicated or carefully chosen community suits it best, and a breeding pair needs room — even a dwarf defends its fry. Much of this is reasoned from the genus rather than from a deep body of altoflava-specific husbandry, which is worth keeping in mind.
Conservation
The IUCN Red List assesses Amatitlania altoflava as Data Deficient (assessed 29 June 2019). That category reflects how little is firmly known about the species' true range, population and trend, rather than any judgement that it is secure. This is a small, narrowly recorded fish from a handful of western-Panama drainages, and the usual lower-Central-American pressures — deforestation and sedimentation, agricultural and plantation runoff, pollution, and introduced species — act on its habitat without a clear measure of their effect. No firm population data are published, and that uncertainty is exactly what the listing records. The species carries no CITES listing. It is bred occasionally by specialist hobbyists, so a small captive presence exists, but its wild status remains unresolved.