The catfish distributions sticky

For the discussion of catfish systematics. Post here to draw our attention to new publications or to discuss existing works.
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Taxonomic revision of the Southernmost population of Hypostomus commersoni

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Bertora, A., Grosman, M. F., Sanzano, P. M., Cardoso, Y. P., & Rosso, J. J. (2018). Taxonomic revision of the Southernmost population of Hypostomus commersoni Valenciennes, 1836 (Siluriformes: Loricariidae) and comments on dispersal routes. Historia Natural, Series 3, 8(1): 2018/25-34

Bertora, A., Grosman, M. F., Sanzano, P. M., Cardoso, Y. P., & Rosso, J. J. (2018). Revision taxonómica de las poblaciones más australes de Hypostomus commersoni Valenciennes, 1836 (Siluriformes: Loricariidae) y comentarios sobre las vías de dispersión. Historia Natural, Series 3, 8(1): 2018/25-34

https://ri.conicet.gov.ar/handle/11336/87492
PDF: https://ri.conicet.gov.ar/bitstream/han ... sAllowed=y

New location reported: 36°55’38.66”S,58°56’8.70”W
Abstract
Hypostomus is one of the most diverse genus of South American freshwater catfishes. In Argentina, Valenciennes, 1836 is distributed throughout the major river networks of the La Plata River basin and in the Pampa Plain. The recent record of H. commersoni in the Langueyú stream, represents the southernmost occurrence for this species and highlights the role of Samborombón bay as a likely dispersal route. It also supports the role of artificial channels in the translocation of freshwater fauna. In this study, a taxonomic revision of H. commersoni from the Langueyú stream was performed and aspects about ichthyofauna dispersal routes are discussed. The taxonomy of populations in the extreme of the species’ distribution range contributes with information about geographic variation of characters.
  • Key words: Hypostominae, distribution, La Plata River basin, taxonomy, Langueyú stream.
Resumen.
Hypostomus es uno de los géneros más diversos de peces de agua dulce de Sudamérica. En Argentina, Valenciennes, 1836 se distribuye a lo largo de las principales redes de ríos de la cuenca del río de la Plata y en la llanura Pampeana. El reciente registro de H. commersoni en el arroyo Langueyú, representa la ocurrencia más austral de esta especie y destaca el papel de la bahía de Samborombón como probable ruta de dispersión. También apoya el rol de los canales artificiales en la translocación de la fauna de agua dulce. En este estudio se realiza una revisión taxonómica de H. commersoni del arroyo Langueyú y se discuten aspectos sobre las rutas de dispersión de la ictiofauna. La taxonomía de las poblaciones en los extremos del rango de distribución de las especies contribuye con información sobre la variación geográfica de los caracteres.
  • Palabras clave: Hypostominae, distribución, cuenca del Río de La Plata, taxonomía, arroyo
    Langueyú.
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Re: The catfish distributions sticky

Post by bekateen »

Moderator's note: (06 June 2022): From the post here: viewtopic.php?f=14&t=50890#p333596, I infer that the fish listed as are actually , and I've reassigned the occurrence accordingly.

Frota, A., Ota, R. R., Deprá, G. D. C., Ganassin, M. J. M., & Graça, W. J. D. (2020). A new inventory for fishes of headwater streams from the rio das Cinzas and rio Itararé basins, rio Paranapanema system, Paraná, Brazil. Biota Neotropica, 20(1). http://dx.doi.org/10.1590/1676-0611-bn-2019-0833





* I did not add this location to the R. quelen CLOG because that species is so muddled, I imagine it's quite likely the ID is incorrect.












ABSTRACT:

The Rio das Cinzas and Itararé basins are important tributaries of the Paranapanema river, the major left-bank tributary of the upper Paraná basin. The upper reaches of both drainages intersect the northern portion of the APA Devonian Escarpment Environment Protection Area (EPA), an area considered crucial for the preservation of biodiversity. This study aimed to provide an ichthyofaunistic inventory for headwater streams of the Rio das Cinzas and Itararé basins, both within and off the borders of the EPA, increasing the knowledge about species already known from streams in the Paranapanema river system. We found 32 fish species, representing five orders and 12 families. Siluriformes was the richest order followed by Characiformes. Ten species presented high abundance of sampled individuals, contributing with 85. 0% of all specimens. Most species were classified as occasional (captured in less than 25% of samples) and only two species were classified as constant (captured in more than 50% of samples), which may reflect the altitudinal gradient. We did not record any introduced species in the sampled streams, reinforcing the need for at least maintaining the original area of ​​the EPA. We expanded the geographic distribution of Astyanax bifasciatus to the upper Paraná River system, confirming the cases of faunal exchange among several drainage systems in the boundaries of the Ponta Grossa Arch. Finally, we identified three putatively undescribed species that show a large biodiversity knowledge shortfall for the region studied.
  • Keywords: Altitudinal gradient; Devonian Escarpment; faunal exchange; upper rio Paraná
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Re: The catfish distributions sticky

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Martine, G. (2019). Distribuição do ictioplâncton em diferentes micro-habitats do médio Rio Uruguai, Brasil. Dissertação de Mestrado, Programa de Pós Graduação em Ambiente e Tecnologias Sustentáveis da Universidade Federal da Fronteira Sul.
https://rd.uffs.edu.br/handle/prefix/3098
PDF: https://rd.uffs.edu.br/bitstream/prefix ... ARTINE.pdf

Ichthyoplankton of the middle Rio Uruguay basin:







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Re: The catfish distributions sticky

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Terán, G. E., Aguilera, G., Díaz, F. R., Koerber, S., & Mirande, J. M. (2020). First record of Hypostomus roseopunctatus (Siluriformes: Loricariidae) for Argentina. Ichthyological Contributions of PecesCriollos, 65: 1-4. available as pdf-file at www.pecescriollos.de since 23.Mar.2020

https://media.hotelwebservice.com/media ... entina.pdf
Abstract
In this note we expand the known distributional range of to the political boundaries of Argentina. The sole specimen was obtained in the Miriñay River, Uruguay River basin, province of Corrientes. With this record the number of Hypostomus species known from Argentina raises to 26.
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Pylodictis olivaris in Canada

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Illes, C., Colm, J. E., Mandrak, N. E., & Marson, D. M. (2020). Flathead Catfish (Pylodictis olivaris) reproduction in Canada. The Canadian Field-Naturalist, 133(4), 372-380.

https://www.canadianfieldnaturalist.ca/ ... /view/2323

DOI: http://dx.doi.org/10.22621/cfn.v133i4.2323
Abstract

Eleven Flathead Catfish (), representing at least five age classes, were collected between 2016 and 2018 in the lower Thames River, Ontario, Canada. The capture of two juveniles (total lengths 78 mm and 82 mm), the first records of juveniles in Canada, is a strong indication that reproduction has occurred. Previous records were thought to be individuals that dispersed from known populations in American waters of Lake Erie. Flathead Catfish is currently designated as data deficient by the Committee on the Status of Endangered Wildlife in Canada. These new findings may provide sufficient data to reconsider the conservation status of this species.
  • Keywords: Flathead Catfish; Pylodictis olivaris; reproduction; Great Lakes; Lake St. Clair; Thames River; juvenile; young- of-year
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Ageneiosus ucayalensis in the municipality of Viana, state of Maranhão, Brazil

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Coelho, AV, de Oliveira, CA, FREITAS, J., Figueiredo, MB, & de Almeida, ZDS RECORDS OF Ageneiosus ucayalensis (CASTELNAU, 1855), (OSTEICHTHYES: AUCHENIPTERIDAE), IN THE MUNICIPALITY OF VIANA, STATE OF MARANHÃO, BRAZIL. RECORDS OF Ageneiosus ucayalensis (CASTELNAU, 1855), (OSTEICHTHYES: AUCHENIPTERIDAE), IN THE MUNICIPALITY OF VIANA, STATE OF MARANHÃO, BRAZIL , 1-388.

https://www.atenaeditora.com.br/post-artigo/14706
ABSTRACT:

Viana is a municipality located in the micro region of Maranhão Lowlands, state of Maranhão. The species is commonly known as mandubé, it is a freshwater fish of Siluriformes Order and commonly captured in the Baixada Maranhense. The specimens were captured by trawls with mesh sizes nets numbers 05, 06, 08, 09 and 10, in two localities of the municipality, Rio Maracu and Lago de Viana, between September 2014 and August 2015. A total of 71 individuals were captured throughout the study. In the Lake of Viana were captured 42 and in the River Maracu 29 individuals. In the month of December the largest number of specimens was obtained, in total there were 23 specimens, followed by March (13) and February (12). The distribution of the relative frequency of specimens by Total Length classes showed that the number of individuals was highest in the range of class comprising 12 to 14 cm. The average size was 14.07 cm. Currently, there is a growing concern for the preservation of these ecosystems and their species, since they serve food for riverside communities. This work, together with other studies on Ageneiosus ucayalensis species may delineate safe actions in the sustainable use of water resources in the region.
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Otothyropsis piribebuy in the Rio Tererê, Rio Paraguay basin, Brazil

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Hocama, G. S., de Oliveira Martins, F., & Severo-Neto, F. (2020). First record and extended distribution of Otothyropsis piribebuy (Loricariidae: Hypoptopomatinae) in Brazil. Papéis Avulsos De Zoologia, 60, e20206021. DOI: https://doi.org/10.11606/1807-0205/2020.60.21.

https://www.revistas.usp.br/paz/article/view/162087
ABSTRACT
Cascudinhos are a group of small benthic fishes included in the Hypoptopomatinae subfamily, inhabiting small to moderate streams and rivers within the Neotropical region, from Venezuela to Northern Argentina. Until now, originally described from the rio Paraguay basin, in Paraguay, is the only species of the genus not recorded in Brazil. Recent samples in the rio Tererê, rio Paraguay basin, Brazil, revealed a population of Otothyropsis with uncertain taxonomic identity. Therefore, the study aimed to unveil the distribution of Otothyropsis within Brazilian territory. External morphology, osteology, measurements, and counts (plates, teeth, and rays) of these specimens from rio Tererê were compared to data from the original description of O. piribebuy, and also with specimens of O. piribebuy sampled in Paraguayan territory. Observations indicated no differences among the analyzed specimens. Furthermore, a Principal Component Analysis (PCA), carried out using log-transformed measures from Brazilian and Paraguayan specimens, showed no separation of these populations, also indicating that all analyzed specimens pertain to the same species. Based on this, a prediction map of distribution, using Maximum Entropy, was produced. The correct identification of spatial range of occurrence is an essential step to ensure the conservation of species, and the extended distribution of Otothyropsis piribebuy was confirmed, enhancing the list of neotropical fish from Brazil.
Attachments
Figure 1. Distribution of Otothyropsis piribebuy within the rio Paraguay basin. Star = holotype; square = paratype; triangle = non-type, from Paraguay. Circles = new occurrence in Brazil.
Figure 1. Distribution of Otothyropsis piribebuy within the rio Paraguay basin. Star = holotype; square = paratype; triangle = non-type, from Paraguay. Circles = new occurrence in Brazil.
Figure 2. Otothyropsis piribebuy, nontype, first record in Brazilian territory, ZUFMS 5796, 23.8 mm SL, female, Rego d’Água, Porto Murtinho, Mato Grosso do Sul, Brazil.
Figure 2. Otothyropsis piribebuy, nontype, first record in Brazilian territory, ZUFMS 5796, 23.8 mm SL, female, Rego d’Água, Porto Murtinho, Mato Grosso do Sul, Brazil.
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Re: Taxonomic revision of the Southernmost population of Hypostomus commersoni

Post by Donovan05 »

bekateen wrote: 06 Nov 2019, 00:03 Bertora, A., Grosman, M. F., Sanzano, P. M., Cardoso, Y. P., & Rosso, J. J. (2018). Taxonomic revision of the Southernmost population of Hypostomus commersoni Valenciennes, 1836 (Siluriformes: Loricariidae) and comments on dispersal routes. Historia Natural, Series 3, 8(1): 2018/25-34

Bertora, A., Grosman, M. F., Sanzano, P. M., Cardoso, Y. P., & Rosso, J. J. (2018). Revision taxonómica de las poblaciones más australes de Hypostomus commersoni Valenciennes, 1836 (Siluriformes: Loricariidae) y comentarios sobre las vías de dispersión. Historia Natural, Series 3, 8(1): 2018/25-34

https://ri.conicet.gov.ar/handle/11336/87492
PDF: https://ri.conicet.gov.ar/bitstream/han ... sAllowed=y

New location reported: 36°55’38.66”S,58°56’8.70”W
Abstract
Hypostomus is one of the most diverse genus of South American freshwater catfishes. In Argentina, Valenciennes, 1836 is distributed throughout the major river networks of the La Plata River basin and in the Pampa Plain. The recent record of H. commersoni in the Langueyú stream, represents the southernmost occurrence for this species and highlights the role of Samborombón bay as a likely dispersal route. It also supports the role of artificial channels in the translocation of freshwater fauna. In this study, a taxonomic revision of H. commersoni from the Langueyú stream was performed and aspects about ichthyofauna dispersal routes are discussed. The taxonomy of populations in the extreme of the species’ distribution range contributes with information about geographic variation of characters.
transfers reims
  • Key words: Hypostominae, distribution, La Plata River basin, taxonomy, Langueyú stream.
Resumen.
Hypostomus es uno de los géneros más diversos de peces de agua dulce de Sudamérica. En Argentina, Valenciennes, 1836 se distribuye a lo largo de las principales redes de ríos de la cuenca del río de la Plata y en la llanura Pampeana. El reciente registro de H. commersoni en el arroyo Langueyú, representa la ocurrencia más austral de esta especie y destaca el papel de la bahía de Samborombón como probable ruta de dispersión. También apoya el rol de los canales artificiales en la translocación de la fauna de agua dulce. En este estudio se realiza una revisión taxonómica de H. commersoni del arroyo Langueyú y se discuten aspectos sobre las rutas de dispersión de la ictiofauna. La taxonomía de las poblaciones en los extremos del rango de distribución de las especies contribuye con información sobre la variación geográfica de los caracteres.
  • Palabras clave: Hypostominae, distribución, cuenca del Río de La Plata, taxonomía, arroyo
    Langueyú.

Hola, gracias por esta información, especialmente los datos de contacto. estas son cosas muy útiles
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Re: Taxonomic revision of the Southernmost population of Hypostomus commersoni

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Donovan05 wrote: 30 Jun 2020, 21:55Hola, gracias por esta información, especialmente los datos de contacto. estas son cosas muy útiles
De nada. :-)
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Pterocryptis barakensis in River Tissa, Longding district, Arunachal Pradesh foothills

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Dutta, R., Ahmed, A.M., Pokhrel, H., Sarmah, R., Nath, D., Mudoi, L.P., Baruah, D., Bhagabati, S.K. & P. Songtheng. (2020). First report of an endangered silurid catfish, Pterocryptis barakensis (Siluridae) from Brahmaputra drainage, North Eastern Himalayan region of India. Journal of Applied Ichthyology, 36: 528-532.

https://doi.org/10.1111/jai.14042
https://onlinelibrary.wiley.com/doi/ful ... /jai.14042
Abstract
The present communication reports an endangered catfish of the family Siluridae, (Vishwanath & Sharma) for the first time outside its type locality from Brahmaputra drainage. The specimens were collected from the River Tissa, Longding district, Arunachal Pradesh foothills of Himalayan region of North East India. The current study describes morphometric and molecular characteristics of this endangered species.
Attachments
From paper: Figure 1 (a), Map of River Tissa showing the sampling site. (b), Map showing type locality (filled triangle) and present locality (star mark) of Pterocryptis barakensis.
From paper: Figure 1 (a), Map of River Tissa showing the sampling site. (b), Map showing type locality (filled triangle) and present locality (star mark) of Pterocryptis barakensis.
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Re: The catfish distributions sticky

Post by bekateen »

Microglanis cottoides in the Rio Sali?

Hi All, As I'm updating the CLOG entries of the , I've synonymized M. cibelae with , based on the Souza-Shibatta et al. (2018) paper, and I'm also deleting occurrences of Cottoides in the lower Uruguay, based on the same paper above which attributed those reports, based on genetic markers to fish more like .

But there's a stray locality for cottoides out in the Rio Sali. I see no reports of that in the forum (esp. within the Distributions sticky), and I see no reports of collection on GBIF. In fact, GBIF has NO Microglanis out that direction at all.

Does anyone have context for this? If not, I'd like to remove the occurrence of cottoides there. The paper above says genetically, there are no cottoides in the Uruguay basin, but rather they are all spread throughout the coastal drainages.

If I'm making a big mistake here, please stop me. ;-)

Cheers, Eric
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Re: The catfish distributions sticky

Post by bekateen »

bekateen wrote: 07 Sep 2020, 00:32 Microglanis cottoides in the Rio Sali?

Hi All, As I'm updating the CLOG entries of the , I've synonymized M. cibelae with , based on the Souza-Shibatta et al. (2018) paper, and I'm also deleting occurrences of Cottoides in the lower Uruguay, based on the same paper above which attributed those reports, based on genetic markers to fish more like .

But there's a stray locality for cottoides out in the Rio Sali. I see no reports of that in the forum (esp. within the Distributions sticky), and I see no reports of collection on GBIF. In fact, GBIF has NO Microglanis out that direction at all.

Does anyone have context for this? If not, I'd like to remove the occurrence of cottoides there. The paper above says genetically, there are no cottoides in the Uruguay basin, but rather they are all spread throughout the coastal drainages.

If I'm making a big mistake here, please stop me. ;-)
I found it:

Luis Fernández & Gladys Gonzo. 2013. Microglanis cottoides (Boulenger, 1891) (Siluriformes: Pseudopimelodidae): Distribution extension to Salí-Dulce River basin, northwestern Argentina. Check List 9(2): XXX-XXX, 2013.

https://checklist.pensoft.net/article/18659/

https://www.researchgate.net/profile/Gl ... 745505.pdf
Abstract: Microglanis cottoides (Boulenger 1891) is a known Paraná-Plata River basin catfish. Its geographic distribution
is herein extended to a new drainage system, the Salí-Dulce River system, northwestern Argentina, which is a separate
drainage from the Paraná-Plata basin.
Well. This proves problematic. :-/ The fish is probably M. malabarbai.

Cheers, Eric
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Re: The catfish distributions sticky

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That does happen, from time to time a new species means I have to move occurences around. Main thing is the timeline supports this. So, I think you should nuke the occurrence in the Rio Sali?

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Re: The catfish distributions sticky

Post by bekateen »

Will do. Will also add a note to the malabarbai page.

And done.

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Re: The catfish distributions sticky

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I see on the occurrence map the inclusion of the Niger River. This seems highly unlikely and I can't find any reference to a confirmation of M. batesii there. I'm removing the occurrence from the list, but putting this post here in case anyone knows of a confirmation for this detail.

Likewise, I'm suspicious of the occurrence of M. batesii in the Congo. According to HH's 2004 paper, is from the Congo and previously it had been considered a synonym of M. batesii, but now it is considered a valid species unto itself.

HH's paper further states that M. batesii is restricted to Cameroon and Gabon, and even then might represent more than one species due to its variability and broad distribution (meaning its distribution might actually be even more narrow).

Finally, I find only a few (older) collections of M. batesii in the Congo on GBIF; I wonder if their identities are based on the synonymization of M. christyi to M. batesii. Therefore, as with the Niger River occurrence for M. batesii, I'm removing the Congo as an occurrence location in the CLOG for M. batesii, but noting it here in case the action needs to be reversed at a later date.

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Re: The catfish distributions sticky

Post by Jools »

Makes sense. M. polli and M. batesi are mixed up in the literature of old.


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Hemiancistrus’ punctulatus in the lower Yaguarón

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Serra, W.S., Scarabino, F., Wlodek, S., Furtado, G. & A. Balao. (2020). First record of ‘Hemiancistrus’ punctulatus Cardozo & Malabarba, 1999 for Uruguay (Siluriformes: Loricariidae). Boletín de la Sociedad Zoológica del Uruguay, 29(1): 28-34.

https://doi.org/10.26462/29.1.5
https://journal.szu.org.uy/index.php/Bo ... e/view/112
Abstract
A recent expedition to lower Yaguarón river basin in northeastern Uruguay, revealed the presence of the loricariid catfish Cardozo & Malabarba, 1999, which represents the first record of this species for the country. We propose it as an endangered species for Uruguay considering its restricted distribution.
ABSTRACT
Analyses of collections and recently captured specimens in an expedition to lower Yaguarón river basinin northeastern Uruguay, revealed the presence of theloricariid catfish ‘Hemiancistrus’ punctulatus Cardozo & Malabarba,1999, which represents the first record of thisspecies for the country. We propose it as an endangered species for Uruguay considering its restricted distribution. Differences with ‘Hemiancistrus’ megalopteryx are discussed
  • Key-Words: ‘Hemiancistrus’; Uruguay; first record; conservation priority.
Moderator's note: Oddly, this journal displays two different abstracts, depending on whether you're looking on the journal page (shorter abstract) or at the actual article (longer abstract).
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Micromyzon akamai in the Rio Curaray, Ecuador

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Chuctaya, J., Encalada, A. C., Barragán, K. S., Torres, M. L., Rojas, K. E., Ochoa‐Herrera, V., & Carvalho, T. P. (2020). New Ecuadorian records of the eyeless banjo catfish Micromyzon akamai (Siluriformes: Aspredinidae) expand the species range and reveal intraspecific morphological variation. Journal of Fish Biology.

https://doi.org/10.1111/jfb.14630
https://onlinelibrary.wiley.com/doi/abs ... /jfb.14630
PDF: https://onlinelibrary.wiley.com/doi/epd ... /jfb.14630
Abstract
Two specimens of , an eyeless and miniaturized species previously known only from deep channels of the eastern Amazon Basin in Brazil, are reported from the Curaray River, a tributary of the Napo River in Ecuador. The new specimens are the first records of Micromyzon in headwaters of the Amazon River and the first records of M. akamai outside Brazil. External morphological characters and a phylogenetic analysis of the cytochrome c oxidase I (COI) gene support identification of the new specimens as Micromyzon akamai. However, the new specimens also indicate that some features previously hypothesized to be apomorphic for Micromyzon akamai are intraspecifically variable.
  • KEYWORDS: Cytochrome c oxidase I (COI), freshwater fish, Napo, taxonomy, deep-channel fishes, Neotropical
Attachments
Figure 1. (A) Distribution of Micromyzon akamai in the Amazon basin. Black circles:<br />Distribution according to Carvalho et al., 2016. Red star: New record in Curaray River.<br />(B, C) MECN-DP 4371, 12.9 mm LS, new record, Curaray River, Napo Basin, Ecuador<br />in dorsal, lateral and ventral. (D) Phylogenetic relationships of Hoplomyzontinae (and<br />outgroups) supported by maximum likelihood (RAXML - GTRGAMMAI) using COI<br />sequences, with the inclusion of Micromyzon akamai collected from the Curaray River<br />(Ecuador), LA=Lower Amazon, MA=Marañon, MDD= Madre de Dios, NA= Napo, and<br />OR=Orinoco. Photos: J. Wingert (B, C)
Figure 1. (A) Distribution of Micromyzon akamai in the Amazon basin. Black circles:
Distribution according to Carvalho et al., 2016. Red star: New record in Curaray River.
(B, C) MECN-DP 4371, 12.9 mm LS, new record, Curaray River, Napo Basin, Ecuador
in dorsal, lateral and ventral. (D) Phylogenetic relationships of Hoplomyzontinae (and
outgroups) supported by maximum likelihood (RAXML - GTRGAMMAI) using COI
sequences, with the inclusion of Micromyzon akamai collected from the Curaray River
(Ecuador), LA=Lower Amazon, MA=Marañon, MDD= Madre de Dios, NA= Napo, and
OR=Orinoco. Photos: J. Wingert (B, C)
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Re: The catfish distributions sticky

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Guillermo E. Terán, Sergio Bogan, Stefan Koerber and Juliano Ferrer. First records for two catfishes from Argentina: Ituglanis australis Datovo & De Pinna, 2014 and Scleronema macanuda Ferrer & Malabarba, 2020 (Siluriformes: Trichomycteridae). Natural History (Third Series), 10 (3): 39-47.

https://fundacionazara.org.ar/img/revis ... _39-47.pdf
Abstract.
and are trichomycterid catfishes that inhabit freshwater basins from Pampa grasslands of southern Brazil and Uruguay. The aim of the present contribution is to report for the first time the presence of both species in Argentina. These new records are related to small streams of the Uruguay River basin in Entre Ríos province. Both were identified based on ichthyological collections that were made before they were formally described. With these reports the number of Argentinian trichomycterids is increasing to 42.
  • Key words: Entre Ríos, Trichomycteridae, Pampa grasslands, Ituglanis, Scleronema.
Resumen.
Ituglanis australis y Scleronema macanuda, son bagres tricomictéridos que habitan en las cuencas de la región de Pampa y Pastizales del sur de Brasil y Uruguay. En este trabajo documentamos por primera vez la presencia de estas especies en Argentina. Estos nuevos registros están vinculados a pequeños arroyos que forman parte de la cuenca del río Uruguay en la provincia de Entre Ríos y se lograron identificar gracias a la revisión de colecciones ictiológicas formadas años antes de que estas especies fueran descriptas formalmente. Los dos registros incrementan a 42 el número de especies de tricomictéridos documentados en la Argentina.
  • Palabras clave: Entre Ríos, Trichomycteridae, Pampa y Pastizales, Ituglanis, Scleronema.
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Re: The catfish distributions sticky

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Wilson S. Serra, Fabrizio Scarabino, Sabina Wlodek and Stefan Koerber. Confirmation of the presence of Zungaro jahu (Ihering, 1898) for Uruguay (Siluriformes: Pimelodidae) and a review of associated historical records for the country. Natural History (third series), 10 (3): 49-58.

https://fundacionazara.org.ar/img/revis ... _49-58.pdf
Abstract.
is a siluriform fish well known from the Paraná river but also recorded from the Argentinean coast of the La Plata river, based on well confirmed and illustrated records. The presence of Z. jahu is confirmed for the Uruguayan territory, based on a single juvenile specimen collected in the La Plata river (Colonia county) in 1966. Other records associated with this species for the country are discussed and corrected. Species of the genera Microglanis and Pseudopimelodus were frequently misidentified in literature and museum records, thus leaving the present record as the first confirmed one. It is recommended to carry out similar reviews all along the putative distribution area of Z. jahu, insisting in the incorporation of potential specimens into biological collections.
  • Key words: La Plata river, freshwater, Paulicea, Zungaro.
Resumen.
Zungaro jahu es un pez siluriforme bien conocido del río Paraná pero también registrado de la costa argentina del Río de la Plata, en base a material bien ilustrado y confirmado. Se confirma la presencia de Z. jahu para el territorio uruguayo, basado en un único ejemplar colectado en el Río de la Plata (Departamento de Colonia) en 1966. Otros registros referidos a esta especie para el país se discuten y corrigen. Especies de los géneros Microglanis y Pseudopimelodus fueron frecuentemente mal identificados en la literatura y en materiales depositados en museos, dejando el presente registro como el primero confirmado. Se recomienda llevar a cabo revisiones similares a lo largo de la supuesta área de distribución of Z. jahu, insistiendo en la incorporación de posibles ejemplares a colecciones biológicas.
  • Palabras clave: Río de la Plata, agua dulce, Paulicea, Zungaro.
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Silurus glanis in Iraq

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Jawad, L. A., Abed, J., Mohsen, Z., & Al-Janabi, M. (2021). A confirmed record of the European catfish Silurus glanis L., 1758 (Actinopterygii: Siluriformes: Siluridae) from the southern marshes of Iraq, with a new anatomical set of characters to separate S. glanis and S. triostegus. Integrative Systematics: Stuttgart Contributions to Natural History, 3(1), 85-100.
Abstract
Investigations conducted in the southern Iraq freshwater systems allowed the authors to collect the European catfish, L., 1758. These are the first confirmed records of S. glanis from the freshwater systems in Lower Mesopotamia, based on 13 adult specimens, each 325–525 mm in total length. Furthermore, a new set of anatomical characters of S. glanis and S. triostegus from Chibayish marsh area, south of Iraq, was examined to reveal similarities and differences between the two Silurus species. In addition to the traditional separation of the two species of Silurus by number of barbels, these two species can now be recognised based on a new set of morphological and osteological features.
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Re: The catfish distributions sticky

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SILVIA YASMIN LUSTOSA-COSTA, SERGIO BOGAN, LUIZ JARDIM DE QUEIROZ, JUAN I. MONTOYA-BURGOS, ARIEL PARACAMPO, TOMAS MAIZTEGUI, & YAMILA P. CARDOSO. (2021). Distribution extension of (Siluriformes: Loricariidae) in Argentina and first record for Bolivia. Molecular, morphology and biogeography data. Zootaxa, 4996(1): 2 July 2021.

https://DOI.10.11646/ZOOTAXA.4996.1.12
https://mapress.com/zt/article/view/zootaxa.4996.1.12
In recent years, the evolutionary history of the catfish genus Hypostomus has attracted much interest (Cardoso et al. 2021; Jardim de Queiroz et al. 2020; Silva et al. 2016). However, the identification of species of this genus is challenging, given the complex taxonomy of the group and the scarce morphological information available for many taxa. Accurate taxonomic identification is essential to estimate the biodiversity in freshwater environments and the discover of new fish species contributes not only to assess the diversity of regional fauna but also to reconstruct the geomorphological evolution of the river basins, notably in South America. The application of multi-source approaches takes advantage of the complementarity between disciplines to estimate the species diversity, especially among those with an obscure taxonomic status (Dayrat 2005).
Hypostomus constitutes an assemblage of more than 150 species of bottom-dwelling fishes with algivorous or detritivore diets that are widely distributed throughout South America (Fricke et al. 2021). Within the La Plata Basin (which includes the Paraguay, Paraná, Uruguay and Rio de La Plata rivers) the diversity of species of this genus is being revised (Cardoso et al. 2011, 2012, 2016, 2019). However, there are still many studies to be done given problems within the genus, the excessively short original descriptions of many species and the mistaken species identifications, including in scientific collections. (Reis et al. 1990) was originally described from the Uruguay River Basin in Brazil and Uruguay, Reis et al. (1990) distinguishing it from other Hypostomus from the Uruguay River by a very light ground color with darker dots, lower number of lateral plates (26-27) and a strongly concave caudal fin margin. This species was then cited for Argentina (Boltovsky & Cataldo 1999) and its distribution was expanded into the Lower Paraná River (Almiron et al. 2015; Casciotta et al. 2016).
The specimens examined in this work were collected in the Bermejo River in Argentina and in the Pilcomayo River in Bolivia (Figures 1 and 2). Most of the sequences used here are available in GenBank, but two new sequences were added (accession numbers in Figure 1). Tissue sampling, DNA extraction, PCR amplification of D-loop mitochondrial marker and sequencing were following (Cardoso et al. 2011). With a total of 35 sequences, we found the best substitution model and inferred the phylogeny of the genus using the Maximum Likelihood method in Mega v7 (Kumar et al. 2016). Noe support was assessed using 1000 bootstrap replicates. The fish specimens from Argentina were fixed in formalin and then in ethanol 70% and are deposited at the Foundation Felix de Azara (Institution Code: CFA-IC). Morphometrics follow Reis et al. (1990).
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First record of Plotosus canius in Laos

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Hortle, KG & S Phommanivong, 2021. The first record from Laos of Plotosus canius. Ichthyological Exploration of Freshwaters doi:10.23788/IEF-1167.

Abstract

We record the first capture from Laos of the diadromous eel-tail catfish Plotosus canius as a single specimen of total length 1111 mm from Phapheng Channel, which is the most easterly anabranch of the Mekong in the Khone Falls system in southern Laos. The capture location is about 2.5 km downstream of Phapheng Waterfall and about 2.1 km upstream of the Cambodian border with Laos. As the location is about 720 km from the sea and at least 500 km upstream of any possible saline influence, this record shows that some large individuals of this diadromous species, which breeds in brackish waters, may penetrate long distances into freshwaters, where they feed on crabs and molluscs.
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Re: The catfish distributions sticky

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Henschel, E., & Lujan, N. K. (2021). Range extension of the miniature pencil‐catfish (Siluriformes: Trichomycteridae) into the Essequibo River basin, Guyana. Journal of Fish Biology.

https://onlinelibrary.wiley.com/doi/abs ... /jfb.14841
Abstract
Morphological examination of Potamoglanis specimens from three localities in the Essequibo River basin, Guyana, and one location in the Branco River basin, Brazil, confirmed their identification as P. wapixana – a species originally described from only the Branco River basin. Morphological similarity of these miniature catfishes on opposite sides of the Rupununi savannah watershed divide and new records from lentic habitat suggest that either their modern populations predate the Pliocene division of the Branco and Essequibo rivers or that the species is capable of living in and/or migrating across the Rupununi Portal – a seasonally flooded hydrological connection known to facilitate movement of mostly much larger fishes between the Branco and Essequibo basins.
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Arius gagora range extension to NE India

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Das, D. (2022). Arius gagora Hamilton, 1822 (Siluriformes: Ariidae): Range extension and new addition to the fish fauna of Tripura, North East India. LIFE SCIENCES LEAFLETS, 146.
https://petsd.org/ojs/index.php/lifesci ... /view/1630
Abstract
Hamilton, 1822 (Siluriformes: Ariidae) a new addition to the fish checklist of Tripura, north eastern state of India. This fish species is first sighted on 28 May, 2019 in Kailashahar, Unakoti district of Tripura.
  • Keywords: Ariidae, Arius gagora, catfish, New addition, Range extension
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Re: Arius gagora range extension to NE India

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bekateen wrote: 04 Apr 2022, 18:22 Das, D. (2022). Arius gagora Hamilton, 1822 (Siluriformes: Ariidae): Range extension and new addition to the fish fauna of Tripura, North East India. LIFE SCIENCES LEAFLETS, 146.
https://petsd.org/ojs/index.php/lifesci ... /view/1630
Abstract
Hamilton, 1822 (Siluriformes: Ariidae) a new addition to the fish checklist of Tripura, north eastern state of India. This fish species is first sighted on 28 May, 2019 in Kailashahar, Unakoti district of Tripura.
  • Keywords: Ariidae, Arius gagora, catfish, New addition, Range extension
Thanks to a tip from @shovelnose, he pointed out that the fish shown in the photos from this paper is not . It's a form of , which is also found in the same area. After studying the distribution of Sperata in this area using GBIF, and reading a paper (Gupta, S. (2015). Review on Sperata seenghala (Sykes, 1839), a freshwater catfish of Indian subcontinent. Journal of Aquaculture Research & Development, 6(1): 1-6.), I believe the fish in these photos is , and not which is also found in the area. I based my conclusion on shorter barbels not reaching tips of pelvic fins, and a more posterior placement of adipose fin). Here's my work (photo). I may be wrong. Any opinions?

Cheers, Eric
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Measures based on pixels from snout tip to leading edge of base of dorsal and adipose fins, each expressed as % of SL (again, measured in pixels)
Measures based on pixels from snout tip to leading edge of base of dorsal and adipose fins, each expressed as % of SL (again, measured in pixels)
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Re: Arius gagora range extension to NE India

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bekateen wrote: 06 Apr 2022, 01:41Thanks to a tip from @shovelnose, he pointed out that the fish shown in the photos from this paper is not . It's a form of , which is also found in the same area. After studying the distribution of Sperata in this area using GBIF, and reading a paper (Gupta, S. (2015). Review on Sperata seenghala (Sykes, 1839), a freshwater catfish of Indian subcontinent. Journal of Aquaculture Research & Development, 6(1): 1-6.), I believe the fish in these photos is , and not which is also found in the area. I based my conclusion on shorter barbels not reaching tips of pelvic fins, and a more posterior placement of adipose fin). Here's my work (photo). I may be wrong. Any opinions?
Cheers, Eric
Ugh. Another change-up. @shovelnose was able to send me a more recent and more reliable review of Sperata, and apparently the fish in these two photos is not S. seenghala, but are most likely . I will move the photos accordingly. X_X

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Re: The catfish distributions sticky

Post by Jools »

Ah, the joys!

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Imparfinis guttatus in Argentina

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Gastón Aguilera,Guillermo E. Terán,Juan Marcos Mirande,Felipe Alonso,Guido Miranda Chumacero,Yamila Cardoso,Sergio Bogan,Dario R. Faustino-Fuster. (2022). An integrative approach method reveals the presence of a previously unreported species of Imparfinis Eigenmann and Norris 1900 (Siluriformes: Heptapteridae) in Argentina. J. Fish Biol. First published: 17 August 2022.

https://doi.org/10.1111/jfb.15197
https://onlinelibrary.wiley.com/doi/abs ... /jfb.15197
Abstract
Specimens of were recently collected in northwestern Argentina from the Bermejo River basin (Salta and Jujuy Provinces), del Valle River (Salta Province) and Horcones River (Santiago del Estero Province). An integrative approach to taxonomy, combining a detailed morphological study and molecular phylogenetic analyses, was applied in order to determine the species identity of these specimens. A principal components analysis of morphological data clustered the specimens from northwestern Argentina and from the Amazon basin, indicating a close morphological resemblance. Also, a molecular phylogenetic analysis showed populations of I. guttatus from Argentina and Peru forming a clade. According to the conducted haplotype network analysis these populations are distinct in two mutations. Thus, in absence of morphological or molecular data indicating the contrary, the combined method supports the identity of the specimens from the tributaries of the Paraguay River in Argentina as , whose type locality is in the upper Beni River basin in Bolivia. This contribution is also the first record for this species from Argentina. The disjunct distribution of I. guttatus provides new evidence reinforcing the hypothesis for the origin of the Paraguayan ichthyofauna. We also provide an approach to the phylogenetic relationships of Imparfinis in Heptapteridae.
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Microglanis malabarbai in the Rio de la Plata

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Maiztegui, T., Paracampo, A. H., Liotta, J., Cabanellas, E., Bonetto, C., & Colautti, D. C. (2022). Freshwater fishes of the Río de la Plata: current assemblage structure. Neotropical Ichthyology, 20.
https://doi.org/10.1590/1982-0224-2021-0159
https://www.scielo.br/j/ni/a/VxyrRYBN8CMR5hVbw489C3M/
Abstract
Few studies have addressed the composition of fish assemblages of the freshwater Río de la Plata (RdlP) and have only been limited to species lists gathered over the last two centuries. As such inventories have never been reviewed or validated by fish sampling, the richness and structure of RdlP fish assemblage are poorly known. Hence, we conducted an exhaustive literature review and a fieldwork in six coastal points of Argentina to update the species composition and determine the hierarchical structure of the fish assemblage. From the 206 species registered in the literature, 48 were not confirmed, 13 were absent, five were taken as synonymized species, 29 were supported by literature and 107 were confirmed; one was an established exotic species, and three were a non-established exotic species. The findings reported here suggest that the fish assemblage currently comprises 141 species, including four new records. Analysis of fieldwork data in number and weight of fish captured resulted in an assemblage hierarchical structure of five dominant, 22 frequent, and 45 rare species; 16 dominant, 11 frequent, and 45 rare taxa, respectively. These results could be used as baseline to monitor, manage, and preserve neotropical fish species in their southern distribution boundary.
Keywords: Biodiversity; Conservation; Ichthyofauna; Neotropics; Richness

Note: I have to wonder how this paper applies to previous reports: Specifically, the 2018 paper by Souza-Shibatta et al. that reappraised M. cottoides, and in that paper they suggested there is an undescribed type of Microglanis more southerly than , with the North-South geographic dividing line being around the Rio Cuareim. Is this report confirming actual M. malabarbai? Or is it discovering a more southerly distribution of this undescribed Microglanis?
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