New tetra described from Amazon basin

cdc98c00-8eae-4ad7-b510-42aca095d71f

Editor's Picks
Features Post
The brightest pupils
04 October 2021
Features Post
Dealing with egg ‘fungus’
04 October 2021
Features Post
Rathbun’s tetra in the wild
13 September 2021
Fishkeeping News Post
Report: 2021 BKKS National Koi Show results
13 September 2021
Features Post
The World's forgotten fishes
16 August 2021


Ichthyologists from Brazil have described a new Astyanax tetra from several localities in the Negro, Solimes and lower Tapajs river drainages, naming it Astyanax ajuricaba.

Publishing the description of this new tetra in a recent issue of the journal Neotropical Ichthyology, Manoela Marinho and Flvio Lima distinguish it from congeners in having a unique colour pattern consisting of a conspicuous, narrow dark midlateral stripe, a well-developed vertically-elongated dark humeral spot, and dark upper caudal-fin lobe and middle caudal-fin rays, with a rounded clear ocellated spot on the front third of the upper caudal-fin lobe.

Astyanax ajuricaba was collected from blackwater habitats, with the type locality being such a stream with a predominantly sandy bottom. The specific epithet honors Ajuricaba, paramount chief of the Manau Indians, which formerly inhabited in the middle rio Negro area.

For more information, see the paper: Marinho, MMF and FCT Lima (2009) Astyanax ajuricaba: a new species from the Amazon basin in Brazil (Characiformes: Characidae). Neotropical Ichthyology 7, pp. 169"174.