Hypostomus chrysostiktos is a Pterygoplichthys? Are these fighting words?

[bekateen]

Anjos, M. S., Bitencourt, J. A., Nunes, L. A., Sarmento-Soares, L. M., Carvalho, D. C., Armbruster, J. W., & Affonso, P. R. (2019). Species delimitation based on integrative approach suggests reallocation of genus in Hypostomini catfish (Siluriformes, Loricariidae). Hydrobiologia, 1-16.

https://doi.org/10.1007/s10750-019-04121-z
https://link.springer.com/article/10.10 ... 19-04121-z

Integrative approaches are particularly useful to resolve taxonomic uncertainties in species-rich groups that have undergone explosive radiation, such as Hypostomini (suckermouth armored catfishes). This tribe encompasses the genera

Hypostomus

and

Pterygoplichthys

, but the actual number of species in each genus and the intergeneric interrelationships are confusing or unknown for some ecoregions in the Neotropics. Here, we analyzed three endemic species

Hypostomus chrysostiktos

, H. jaguar and H. unae from Northeastern Mata Atlântica in northeastern Brazil based on meristic characters, geometric morphometrics, chromosomal data, DNA barcode and species delimitation algorithms. The current taxonomic status of these catfishes is challenged. While H. unae and H. jaguar revealed a close evolutionary relationship similar to those observed within Hypostomus from other basins, H. chrysostiktos was herein more closely related to Pterygoplichthys, being invariably recovered as a highly distinctive taxonomic unit than to Hypostomus. Therefore, we recommend the reallocation of H. chrysostiktos as

Pterygoplichthys chrysostiktos

and a thorough systematic review of Pterygoplichthys, particularly focusing on putative convergence traits in relation to Hypostomus.

CLOGs for other species mentioned:

Hypostomus unae

and

Hypostomus jaguar

[Bas Pels]

Apparently we can no longer count rays in the dorsal to say Pterogoblichthys or Hypostomus. What a pity.

[Jools]

Apparently we can no longer count rays in the dorsal to say Pterogoblichthys or Hypostomus. What a pity.

Pragmatically you can, for how long is another matter. But, everything with > 12 rays is a

Pterygoplichthys

, which is, almost always, the question posed.

More broadly, what this points to, is the beginning of the carving up of

Hypostomus

into more manageable chunks - that's a good thing. Assuming it gathers traction, despite the long list of distinguished co-authors, there's still a way to go.

Jools

[The.Dark.One]

chrysostiktos has 10-11 rays anyway, so you can still use the rays in most 'Hypostomus'

[bekateen]

Updated citation:

Anjos, M. S., Bitencourt, J. A., Nunes, L. A., Sarmento-Soares, L. M., Carvalho, D. C., Armbruster, J. W., & Affonso, P. R. (2020). Species delimitation based on integrative approach suggests reallocation of genus in Hypostomini catfish (Siluriformes, Loricariidae). Hydrobiologia, 847: 563-578. https://doi.org/10.1007/s10750-019-04121-z

PDF: http://www.nossacasa.net/nossosriachos/ ... tos%20.pdf