''Pristella'' is a

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

fish A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...

in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Characidae Characidae, the characids, is a family of freshwater subtropical and tropical fish belonging to the order Characiformes. They are found throughout much of Central and South America, including such major waterways as the Amazon and Orinoco Riv ...

. It was formerly a

monotypic taxon In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of Genus, genera, the term ...

only containing ''

Pristella maxillaris ''Pristella maxillaris'' is a species of characin in the genus ''Pristella'', and is commonly known as the X-ray fish or X-ray tetra because of its translucent body. Description It is a widely distributed and adaptable fish, found in the Amaz ...

'', but in 2019 a second species, ''

Pristella ariporo ''Pristella'' is a genus of fish in the Family (taxonomy), family Characidae. It was formerly a monotypic taxon only containing ''Pristella maxillaris'', but in 2019 a second species, ''Pristella ariporo,'' was described. Taxonomy Until 2019, ...

,'' was described.

Taxonomy

Until 2019, ''Pristella'' was a monotypic genus, but ''P. ariporo'' was described in 2019. Additionally, '' Hyphessobrycon axelrodi'' may belong in ''Pristella'' due to its conical teeth, but further genetic studies are needed to confirm this.

Species

There are currently 3 described species: * ''

'' * '' Pristella crinogi'' F.C.T. Lima, Caires, R.A., Conde-Saldaña, C.C., Mirande, J.M. & Carvalho, F.R. (2021): ''A new miniature Pristella (Actinopterygii: Characiformes: Characidae) with reversed sexual dimorphism from the rio Tocantins and rio São Francisco basins, Brazil.'' Canadian Journal of Zoology, 99: 339-348. doi: 10.1139/cjz-2020-0241 * ''

References

{{Taxonbar, from=Q3404028 Pristellini Ray-finned fish genera Taxa named by Carl H. Eigenmann