Has genetic work been done on Buenos Aires tetras?

[Hybridfish7]

Buenos aires tetras, hyphessobrycon anistitsi. As some of you have seen in my prior posts, you know I like to use them as substitutes for central American astyanax because they are practically identical. Another sum of you that I have seen have noticed this as well. While their range exists thousands of miles south of most known astyanax, I wonder, has genetic work been done to determine that they are in fact of hyphessobrycon and just a very drastic case of convergent evolution, or have we not tested the fact yet/could it be proven that they are just a very geographically distant member of the genus?

 

[Milingu]

Hyphessobryon anistitsi has an incomplete lateral line. Astyanax has always a complete one. Therefore H. anisitsi cannot belong to Astyanax.

Hyphessobrycon is not monophyletic and there is definitely some work that needs to be done.

 

[Hybridfish7]

Ah I see, thanks for the clarification. I also noticed hyphessobrycon is one of those lump genre, like varanus or former cichlasoma.

 

[Deadeye]

If you want extra work in BA tetras, I’ve noticed that there seems to be a split in ones with red fins and with yellow fins. Probably just a mutation but worth noting.