Astyanax jordani

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Astyanax jordani
Astyanax jordani Tetra aveugle Aquarium Liege 30012016 01.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Characiformes
Family: Acestrorhamphidae
Genus: Astyanax
Species:
A. jordani
Binomial name
Astyanax jordani
(C. L. Hubbs & Innes, 1936) [2]
Synonyms [3] [4]
  • Anoptichthys jordani C. L. Hubbs & Innes, 1936
  • Anoptichthys antrobius Álvarez, 1946
  • Anoptichthys hubbsi Álvarez, 1947

Astyanax jordani is a species of freshwater ray-finned fish belonging to the family Acestrorhamphidae, the American characins. This fish is found in Mexico. [3] [5] It is sometimes called the cave tetra, or by its local Spanish name sardina ciega.

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, [6] [7] [8] [9] [10] but others continue to recognize the two as separate species. [11]

A. jordani is listed on the IUCN Red List as Endangered on the basis of a dwindling population and an acutely-restricted, highly variable habitat. [1] It is fairly resilient, however, having a population doubling time of 15 months. [3]

The fish was named in honor of C. Basil Jordan of the Texas Aquaria Fish Company (Dallas, Texas), who donated the first type specimens and documented and observed the first wild blind characins known to science. [12]

It reportedly has been introduced to the Philippines. [3]

References

  1. 1 2 Ornelas García, P. (2019). "Astyanax jordani". IUCN Red List of Threatened Species . 2019 e.T191201A1972594. doi: 10.2305/IUCN.UK.2019-3.RLTS.T191201A1972594.en . Retrieved 6 May 2024.
  2. ↑ Hubbs, C. L. and W. T. Innes. 1936. "The first known blind fish of the family Characidae: a new genus from Mexico"; Occ. Pap. Mus. Zoo. 342: 1-7. University of Michigan.
  3. 1 2 3 4 Froese, Rainer; Pauly, Daniel (eds.). "Astyanax jordani". FishBase . October 2015 version.
  4. ↑ Fricke, Ron; Eschmeyer, William N. & van der Laan, Richard (eds.). "Species in the genus Astyanax". Catalog of Fishes . California Academy of Sciences . Retrieved 9 November 2025.
  5. ↑ "Astyanax jordani". Integrated Taxonomic Information System . Retrieved 1 July 2006.
  6. ↑ Jeffery, W. (2009). Regressive evolution in Astyanax cavefish. Annu. Rev. Genet. 43, 25–47.
  7. ↑ 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.
  8. ↑ 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.
  9. ↑ 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.
  10. ↑ Keene; Yoshizawa & McGaugh (2016). Biology and Evolution of the Mexican Cavefish. Elsevier Science. pp. 77–87. ISBN   978-0-12-802148-4.
  11. ↑ Froese, Rainer; Pauly, Daniel (eds.). "Species in genus Astyanax". FishBase . April 2017 version.
  12. ↑ Christopher Scharpf (3 October 2025). "Family ACESTRORHAMPHIDAE Eigenmann 1907 (American Tetras)". The ETYFish Project Fish Name Etymology Database. Retrieved 9 November 2025.


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