''Nematolebias'' 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 ...

Rivulidae The Rivulidae are a family (biology), family of killifishes in the order (biology), order Cyprinodontiformes. They are commonly known as rivulids, South American killifish or New World killifish. The latter names are slightly misleading, however, ...

. These

threatened A threatened species is any species (including animals, plants and fungi) which is vulnerable to extinction in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of ''critical depensatio ...

annual

killifish A killifish is any of various oviparous (egg-laying) cyprinodontiform fish, including families Aplocheilidae, Pantanodontidae, Cyprinodontidae, Fundulidae, Nothobranchiidae, Profundulidae, Aphaniidae and Valenciidae. All together, there ar ...

are

endemic Endemism is the state of a species being found only in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also foun ...

temporary waters, like pools, in the Atlantic Forest in

Rio de Janeiro state Rio de Janeiro () is one of the 27 federative units of Brazil. It has the second largest economy of Brazil, with the largest being that of the state of São Paulo. The state, which has 8.2% of the Brazilian population, is responsible for 9.2% of ...

, Brazil (the equally threatened killifish genera ''

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 ...

'' and ''

Notholebias ''Notholebias'' is a genus of fish in the family Rivulidae. These threatened annual killifish are endemic temporary waters, like ponds, in the Atlantic Forest in Rio de Janeiro state, Brazil (the equally threatened killifish genera ''Leptolebias ...

'' are restricted to the same state).Costa, W.J.E.M., Amorim, P.F. & Aranha, G.N. (2014)
Species limits and DNA barcodes in ''Nematolebias'', a genus of seasonal killifishes threatened with extinction from the Atlantic Forest of south-eastern Brazil, with description of a new species (Teleostei: Rivulidae).
''Ichthyological Exploration of Freshwaters, 24 (3)

013 013 is a music venue in Tilburg, the Netherlands. The venue opened in 1998 and replaced the ''Noorderligt'', the ''Bat Cave'' and the ''MuziekKantenWinkel''. 013 is the largest popular music venue in the southern Netherlands. There are two concer ...

225-236''. They are small fish that are up to in

total length Fish measurement is the measuring of individual fish and various parts of their anatomies, for data used in many areas of ichthyology, including taxonomy and fishery biology. Overall length Standard length (SL) is the length of a fish measured f ...

. Like other killifish, the males are more colorful than females.

Species

There are currently three recognized species in this genus: * '' Nematolebias catimbau'' W. J. E. M. Costa, Amorim & Aranha, 2014 * '' Nematolebias papilliferus'' W. J. E. M. Costa, 2002 * '' Nematolebias whitei'' G. S. Myers, 1942 (Rio pearlfish)

References

Rivulidae Freshwater fish genera {{Rivulidae-stub