''Poblana'' 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 ...

Neotropical silversides The Neotropical silversides are a family, Atherinopsidae, of fishes in the order Atheriniformes. About 112 species in 13 genera are distributed throughout the tropical and temperate waters of the New World, including both marine and freshwater ha ...

that are

endemic Endemism is the state of a species being found 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 found else ...

Mexico Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatema ...

, with each of the four

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

species restricted to a single Oriental Basin maar lake. They are small fish that do not surpass in standard length.

Species

FishBase recognizes four species in this genus, although genetic differences between them are very limited and some regard all as subspecies of ''P. alchichica''. ''Poblana'' is sometimes included in ''

Chirostoma ''Chirostoma'' is a genus of Neotropical silversides from the Lerma River basin in Mexico, including lakes Chapala and Pátzcuaro. Fish in the genus collectively go by the common name charal/charales in their native range (a name also used for ...

'' instead of being regarded a separate genus. * '' Poblana alchichica'' F. de Buen, 1945 (Alchichica silverside) * '' Poblana ferdebueni'' Solórzano & Y. López, 1965 (Chignahuapan silverside) * '' Poblana letholepis''

Álvarez Álvarez or Álvares may refer to: People *Álvarez (surname), Spanish surname Places *Alvares (river), a river in northern Spain * Alvares (ski resort), in Iran *Alvares, Iran * Alvares, Portugal *Álvarez, Santa Fe, a town in the province of Sa ...

, 1950 (La Preciosa silverside) * '' Poblana squamata''

, 1950 (Quechulac silverside)

References

Atherinopsidae Freshwater fish of Mexico Taxonomy articles created by Polbot {{Atheriniformes-stub