| Astyanax jordani | |
|---|---|
 | |
Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Order: | Characiformes |
| Family: | Characidae |
| Genus: | Astyanax |
| Species: | A. jordani |
| Binomial name | |
| Astyanax jordani | |
| Synonyms[3] | |
Anoptichthys jordani | |
Astyanax jordani is afreshwater fish of thecharacinfamily (familyCharacidae) oforderCharaciformes, native toMexico.[3][4] It is sometimes called thecave tetra, or by its localSpanish namesardina ciega.
A blindcave fish,A. jordani is very closely related to theMexican tetra (A. mexicanus) and theirtaxonomy is disputed. Some treat the two as variants of a single species (in which caseA. jordani is ajunior synonym ofA. mexicanus) and this is supported byphylogenetic evidence,[5][6][7][8][9] but others continue to recognize the two as separate species.[10]
A. jordani is listed on theIUCN 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 populationdoubling 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.[11]
It reportedly has beenintroduced to thePhilippines.[3]
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