''Leptopanchax'' is a

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nom ...

of small

fish Fish are aquatic, craniate, gill-bearing animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Approximately 95% of ...

, up to long, in the

family Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

Rivulidae The Rivulidae are a family of killifishes in the order Cyprinodontiformes. They are commonly known as rivulids, South American killifish or New World killifish. The latter names are slightly misleading, however, as they are neither restricted to ...

. They are found in southeastern

Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...

from Paraná to

Rio de Janeiro Rio de Janeiro ( , , ; literally 'River of January'), or simply Rio, is the capital of the state of the same name, Brazil's third-most populous state, and the second-most populous city in Brazil, after São Paulo. Listed by the GaWC as a ...

.Costa, W.J.E.M. (2016)
Comparative morphology and classification of South American cynopoeciline killifishes (Cyprinodontiformes: Aplocheilidae), with notes on family-group names used for aplocheiloids.
''Vertebrate Zoology, 66 (2): 125-140.'' Depending on the exact species, they inhabit small seasonal channels in the Atlantic rainforest or temporary pools in open habitats. Several ''Leptopanchax'' species are very rare and '' L. sanguineus'' is possibly extinct.

Species

The species in ''Leptopanchax'' were formerly included in ''

Leptolebias ''Leptolebias'' is a ray-finned fish genus of the killifish family Rivulidae. Like many of their relatives, they are rather ambiguously known as "pearlfish". They are endemic to the coastal areas of Brazil, where they inhabit ephemeral pools in ...

'', but this makes the latter genus paraphyletic, although they are still placed in that genus by Fishbase. There are currently 6 recognized species in ''Leptopanchax'': * '' Leptopanchax aureoguttatus'' ( da Cruz, 1974) * '' Leptopanchax citrinipinnis'' ( W. J. E. M. Costa, Lacerda & Tanizaki, 1988) * '' Leptopanchax itanhaensis'' ( W. J. E. M. Costa, 2008) * '' Leptopanchax opalescens'' ( G. S. Myers, 1942) * '' Leptopanchax sanguineus'' W. J. E. M. Costa, 2019 – possibly extinct * '' Leptopanchax splendens'' ( G. S. Myers, 1942)

References

{{Taxonbar, from=Q28432096 Rivulidae Cyprinodontiformes Fish of South America Freshwater fish genera Endemic fauna of Brazil