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Actinopterygii (ray-finned fishes) > Characiformes (Characins) > Characidae (Characins) > Characinae
Etymology: Priocharax: Greek, prio = to saw + Greek, charax, -akos = a fish without identification (Ref. 45335); nanus: Derived from the Latin nanus (meaning a dwarf) in allusion to the tiny size of adult specimens of the species. A noun in apposition.

Environment / Climate / Range Ecology

Freshwater; benthopelagic; depth range 0 - 1 m (Ref. 96862). Tropical, preferred ?

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South America: Rio Negro basin, Amazonas, Brazil.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 1.5 cm SL male/unsexed; (Ref. 96862)

Short description Morphology | Morphometrics

Dorsal soft rays (total): 10-11; Vertebrae: 32 - 34. Priocharax nanus can be distinguished from its congeners (P. ariel and P. pygmaeus) by having i,6 pelvic-fin rays (vs. i,5), a claustrum (vs. claustrum absent) and two postcleithra (vs. postcleithra absent). It can be further diagnosed from P. ariel by having 9-10 gill rakers on the lower limb of the first branchial arch (vs. 11-13), caudal peduncle length 13.5-16.8 % SL (vs. 18.1- 23.7 % SL); and 21-26 branched anal-fin rays (vs. 16-21) (Ref. 96862).

Collected in the black acidic waters of the Rio Negro basin around the submerged vegetation at depths of about 1 m or less and from an area exposed to the sun in warm, shallow water, approximately 50 cm deep (Ref. 96862).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Toledo-Piza, M., G.M.T. Mattox and R. Britz, 2014. Priocharax nanus, a new miniature characid from the rio Negro, Amazon basin (Ostariophysi: Characiformes), with an updated list of miniature Neotropical freshwater fishes. Neotrop. Ichthyol. 12(2):229-246. (Ref. 96862)

IUCN Red List Status (Ref. 115185)

Not Evaluated

CITES (Ref. 94142)

Not Evaluated

Threat to humans

Harmless

Human uses

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Priocharax nanus Toledo-Piza, Mattox & Britz, 2014