Taxonomy & naming
This is an undescribed form: no scientific name, authority or type material stands behind it, and its identity and range are not documented in the sources the atlas uses. "Rio Tocantins" is a river-name label used by the trade; it carries no L-number. Aqua Haus Gaus gives the form only as a product name with a size.
Morphology
Aqua Haus Gaus gives no description of this fish. Like other Ancistrus, the genus carries branched tentacles on the snout of adult males (genus-level).
Habitat
The Rio Tocantins is a major river of central Brazil. The listing gives no collection details beyond the label. Ancistrus as a genus are widespread in South American rivers and streams (genus-level).
Feeding
Ancistrus graze algae and biofilm and accept vegetable foods and sinking pellets (genus-level); no diet is documented for this form.
Mating
Ancistrus are cave spawners in which the male guards the clutch (genus-level). Spawning of this form is not documented.
Breeding
No captive-breeding record for this form is held by the atlas.
In the aquarium
The only listing is Aqua Haus Gaus's 1.5–2.5 in size, which carries no care figures. Provide caves and driftwood, as for other Ancistrus.
Conservation
No IUCN assessment exists for this undescribed form. Its range and numbers are not documented, so its conservation status cannot be stated.