|In the Suma Aqualife Park, Japan|
Astyanax jordani is a freshwater fish of the characin family (family Characidae) of order Characiformes, native to Mexico. It is sometimes called the cave tetra, or by its local Spanish name tetra ciego.
A blind cave fish, A. jordani is very closely related to the Mexican tetra (A. mexicanus) and their taxonomy is disputed. Some treat the two as variants of a single species (in which case A. jordani is a junior synonym of A. mexicanus) and this is supported by phylogenetic evidence, but others continue to recognize the two as separate species.
A. jordani is listed on the IUCN Red List as Vulnerable on the basis of shrinking population and an acutely restricted and diminishing habitat. It is fairly resilient, however, having a population doubling time of 15 months.
- Contreras-Balderas, S. & P. Almada-Villela (1996). "Astyanax mexicanus ssp. jordani ". IUCN Red List of Threatened Species. 1996: e.T2270A9379535. doi:10.2305/IUCN.UK.1996.RLTS.T2270A9379535.en.
- Hubbs, C. L. and W. T. Innes. 1936. "The first know blind fish of the family Characidae: a new genus from Mexico"; Occ. Pap. Mus. Zoo. 342: 1-7. University of Michigan.
- Froese, Rainer and Pauly, Daniel, eds. (2015). "Astyanax jordani" in FishBase. October 2015 version.
- "Astyanax jordani". Integrated Taxonomic Information System. Retrieved 1 July 2006.
- Jeffery, W. (2009). Regressive evolution in Astyanax cavefish. Annu. Rev. Genet. 43, 25–47.
- Bradic, M., Beerli, P., Garcia-de Leon, F. J., Esquivel-Bobadilla, S. & Borowsky, R. L. (2012). Gene flow and population structure in the Mexican blind cavefish complex (Astyanax mexicanus). BMC. Evol. Biol. 12, 9.
- Dowling, T. E., Martasian, D. P. & Jeffery, W. R. (2002). Evidence for multiple genetic forms with similar eyeless phenotypes in the blind cavefish, Astyanax mexicanus. Mol. Biol. Evol. 19, 446–455.
- Strecker, U., Faúndez, V. H. & Wilkens, H. (2004). Phylogeography of surface and cave Astyanax (Teleostei) from Central and North America based on cytochrome b sequence data. Mol. Phylogenet. Evol. 33, 469–481.
- Keene; Yoshizawa & McGaugh (2016). Biology and Evolution of the Mexican Cavefish. pp. 77–87. ISBN 978-0-12-802148-4.
- Froese, Rainer and Pauly, Daniel, eds. (2017). Species of Astyanax in FishBase. April 2017 version.
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