Girardinichthys

{{Short description|Genus of fishes}}

{{Automatic_taxobox

| image = Girardinichthys viviparus 321628.png

| image_caption = Girardinichthys viviparus

| taxon = Girardinichthys

| authority = Bleeker, 1860

| type_species = Girardinichthys innominatus

| type_species_authority = Bleeker, 1860{{Cof record|genid=3663|title=Girardinichthys|access-date=19 September 2019}}

}}

Girardinichthys is a genus of splitfins that are endemic to Mexico. These highly threatened fish are native to the upper Lerma and Balsas basins, as well as water systems in the Valley of Mexico. Through man-made channels G. viviparus has been able to spread to the upper Pánuco River basin.{{cite book | editor1=Ceballos, G. | editor2=E.D. Pardo | editor3=L.M. Estévez | editor4=H.E. Pérez | year=2016 | title=Los peces dulceacuícolas de México en peligro de extinción | pages=309–311 | publisher=Fondo de Cultura Económic | isbn=978-607-16-4087-1 }}{{cite web | url=http://www.goodeidworkinggroup.com/girardinichthys-viviparus |title=Girardinichthys viviparus | publisher=Goodeid Working Group |accessdate=23 September 2018 }} These small fish reach up to {{cvt|6.5|cm}} in length.{{FishBase genus | genus = Girardinichthys| month = August | year = 2018}} The name of this genus honours the American herpetologist and ichthyologist Charles Girard (1822-1895).{{cite web | url = http://www.etyfish.org/cyprinodontiformes3/ | work = The ETYFish Project Fish Name Etymology Database | author1 = Christopher Scharpf | author2 = Kenneth J. Lazara | date = 26 April 2019 | title= Order CYPRINODONTIFORMES: Families PANTANODONTIDAE, CYPRINODONTIDAE, PROFUNDULIDAE, GOODEIDAE, FUNDULIDAE and FLUVIPHYLACIDAE | accessdate = 19 September 2019 | publisher = Christopher Scharpf and Kenneth J. Lazara}}