Hypostomus chrysostiktos is a Pterygoplichthys? Are these fighting words?

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Hypostomus chrysostiktos is a Pterygoplichthys? Are these fighting words?

Post by bekateen » Sat Nov 23, 2019 9:35 pm

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
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Re: Hypostomus chrysostiktos is a Pterygoplichthys? Are these fighting words?

Post by Bas Pels » Sun Nov 24, 2019 9:26 am

Apparently we can no longer count rays in the dorsal to say Pterogoblichthys or Hypostomus. What a pity.
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Re: Hypostomus chrysostiktos is a Pterygoplichthys? Are these fighting words?

Post by Jools » Sun Nov 24, 2019 1:02 pm

Bas Pels wrote:
Sun Nov 24, 2019 9:26 am
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.

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Re: Hypostomus chrysostiktos is a Pterygoplichthys? Are these fighting words?

Post by The.Dark.One » Thu Nov 28, 2019 8:03 pm

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

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Re: Hypostomus chrysostiktos is a Pterygoplichthys? Are these fighting words?

Post by bekateen » Sat Jan 11, 2020 8:05 pm

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
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