''Chirostoma bartoni'', the Alberca silverside, is a species of

neotropical silverside 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 h ...

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 elsew ...

to the

Lerma River The Lerma River ( es, Río Lerma) is Mexico's second longest river. It is a river in west-central Mexico that begins in Mexican Plateau at an altitude over above sea level, and ends where it empties into Lake Chapala, Mexico's largest lake, near ...

basin of Mexico. Typical adult specimens are approximately 7.1 cm in length. The Alberca silverside was found only in the Alberca Caldera, Guanajuato, Mexico and likely became extinct when the caldera temporarily dried up in August 2006. The specific name honours

Barton Appler Bean Barton Appler Bean was an American ichthyologist, born May 21, 1860 in Lancaster County, Pennsylvania and died June 16, 1947 in Chemung, New York, after falling from a bridge. He was the brother of the ichthyologist Tarleton Hoffman Bean (1846-1 ...

(1860-1947) who was Assistant Curator of Fishes at the U.S. National Museum.

References

bartoni Freshwater fish of Mexico Taxonomy articles created by Polbot Fish described in 1896 Fish extinctions since 1500 {{Atheriniformes-stub