Taxonomy & naming
L316 belongs to the L-number series DATZ began in 1988 for imported loricariids that could not yet be named. The Südamerikafans registry lists the fish as Hypancistrus sp. “L 316” and PlanetCatfish as Hypancistrus sp. (L316); neither attaches another code, and the registry names no related LDA number. The only trade name on record is the German Jari-Zebrawels, and Jari zebra pleco is the English common name. The bibliography is short: entries in the Welsatlas 2, the Hypancistrus Fibel and the Miniatlas L-Welse.
Morphology
About 4.5 in total length is the registry’s figure. Diagnostic characters are not on record, and an undescribed form has no formal description to cite. Hypancistrus are small, flattened, armoured loricariids, and Zebra in the trade names points to a banded pattern — a label, not a measured character. For comparison the registry lists Hypancistrus seideli (L66 and L333) and Hypancistrus sp. L428 as similar fishes, the forms to hold it against when trying to identify it.
Habitat
The registry places L316 in the Rio Jari in Amapá and Pará, Brazil, in the Amazon drainage, with the water classed as clearwater. The collecting area is given as upstream of Monte Dourado in one place and as north of Monte Dourado in another. No substrate or microhabitat is recorded. Hypancistrus sp. L318 and Pseudacanthicus sp. L320 are listed as fishes found together with L316.
Feeding
L316 is classed as mainly an omnivore, and whether it eats aquarium plants is not recorded. Keepers feeding an omnivorous Hypancistrus commonly offer sinking wafers, frozen foods and a little vegetable matter. No wild diet data are on record; the registry gives a dietary class only and names no particular foods.
Mating
The sexing statement in the registry applies to the genus: in Hypancistrus the male has a broader head, a slimmer waist, stronger pectoral-fin rays and more strongly developed odontodes. Hypancistrus are cave spawners, and the male guards the eggs and larvae in the cave; cave behaviour for this fish is listed as the genus standard. No courtship has been documented for L316 on its own.
Breeding
Repeated captive breeding is on record, but the registry gives no source and no details of the spawnings. Clutch size, hatching time and fry growth are not on record for L316. Cave spawning, as in the rest of the genus, is the expectation; nothing specific to this code is reported, and the bibliography lists only general reference works.
In the aquarium
Registry keeping figures are 77–84 °F and pH 5.5–7.5, with a recommended tank length of 23.5 in; these are aquarium figures, not field data. Small groups are advised, though a single fish is possible. Plecos of this kind generally need clean, well-oxygenated water with some current and enough caves or rock for each fish to hold a retreat. They can be territorial toward each other.
Conservation
L316 is Not Evaluated by the IUCN; without a formal name it cannot be assessed. According to the registry it is on neither Brazil’s 2012 positive list nor its 2020 negative list. Collection for the trade and river engineering affect some L-number habitats in general, but no pressure on the Rio Jari population is documented.