Felipe Alonso🇦🇷⭐️⭐️⭐️

Evolutionary Biologist. PhD (UBA). Asistant Researcher CONICET. Universidad Nacional de Salta. Argentina. Fishes 🐟🐠🐡 Ichthyology

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

The future of Argentina’s unique killifishes is at risk. We need to act now to protect them and their habitats. Please consider donating or sharing this campaign. Every bit helps. https://t.co/HKDqsuuEFV

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

Urkumayu petracinii (Calviño & Alonso, 2010) small armored catfish of Callichthyidae family endemic to the Arenales River basin—upper Juramento basin, in the northwestern portion of the Río de la Plata basin.

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

Urkumayu micracanthus (Regan, 1912)
Una pequeña joya de los ríos de montaña del noroeste de la cuenca del plata.
Esta especie de bagre acorazado de la familia Callichthyidae es endémica de la cuenca alta del río Bermejo, donde habita ríos y arroyos de las Yungas
📷 Pablo Calviño

[Fish in the News @FishInTheNews]

#NewSpeciesAlert - 𝐵𝑢𝑛𝑜𝑐𝑒𝑝ℎ𝑎𝑙𝑢𝑠 𝑔𝑎𝑟𝑐𝑖𝑎𝑖, a new species of banjo catfish (Aspredinidae), is described from the Tocantins-Araguaia River basin, Brazil.

🔒 https://t.co/2kiWxMR4Vh

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
Description of new species of 𝐵𝑢𝑛𝑜𝑐𝑒𝑝ℎ𝑎𝑙𝑢𝑠 Kner 1855 (Siluriformes: Aspredinidae) from the Tocantins-Araguaia River basin, using an integrative approach

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Crispim, J.L., Frisoni, W.J.M., Costa, N.S., Sabaj, M.H. & Oliveira, C. (2026) Description of new species of 𝐵𝑢𝑛𝑜𝑐𝑒𝑝ℎ𝑎𝑙𝑢𝑠 Kner 1855 (Siluriformes: Aspredinidae) from the Tocantins-Araguaia River basin, using an integrative approach. Zootaxa, 5894 (1), 65–83. https://t.co/CeU5eE1m1r

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
𝐵𝑢𝑛𝑜𝑐𝑒𝑝ℎ𝑎𝑙𝑢𝑠 currently comprises 14 valid species and is the most species-rich genus within the banjo catfish family (Aspredinidae), occurring widely across major trans- and cis-Andean drainages of South America. Despite this broad distribution, no species has yet been described from the Tocantins-Araguaia basin, a region recognized for its high level of endemism.

Here, we describe a new species of 𝐵𝑢𝑛𝑜𝑐𝑒𝑝ℎ𝑎𝑙𝑢𝑠 from the Tocantins–Araguaia basin using an integrative taxonomic approach, applied for the first time in the genus. We also discuss the molecular and morphological diversity within a lineage previously represented by a single valid species, 𝐵𝑢𝑛𝑜𝑐𝑒𝑝ℎ𝑎𝑙𝑢𝑠 𝑎𝑙𝑒𝑢𝑟𝑜𝑝𝑠𝑖𝑠. Species delimitation analyses based on the cytochrome c oxidase subunit I (COI) marker recovered additional distinct Molecular Operational Taxonomic Units (MOTUs), suggesting the presence of further undescribed species within 𝐵𝑢𝑛𝑜𝑐𝑒𝑝ℎ𝑎𝑙𝑢𝑠.

𝗘𝘁𝘆𝗺𝗼𝗹𝗼𝗴𝘆
The specific epithet “𝑔𝑎𝑟𝑐𝑖𝑎𝑖” honours the Peruvian ichthyologist Dr James Raúl Garcia Ayala, of the Laboratório de Biologia e Genética de Peixes (LBP-UNESP), who helped collect part of the type series, in recognition of his research on Neotropical fishes, especially the taxonomy of the subfamily Stethaprioninae.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Holotype of 𝐵𝑢𝑛𝑜𝑐𝑒𝑝ℎ𝑎𝑙𝑢𝑠 𝑔𝑎𝑟𝑐𝑖𝑎𝑖 (LBP 37103, 92.2 mm SL) in dorsal (top), lateral (middle) and ventral (bottom) views. Scale bar = 10 mm. Photographed by J. L. Crispim.

© 2026 the Author(s). Published in the journal Zootaxa.

#NewSpecies #Ichthyology #Taxonomy #Biodiversity #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #FishTank #Bunocephalus #Catfishes #BanjoCatfish #Siluriformes #Aspredinidae #Brazil #rioTocantins #rioAraguaia

[Fish in the News @FishInTheNews]

#FishBook - 'Fishes of the Genus 𝑁𝑜𝑡ℎ𝑜𝑏𝑟𝑎𝑛𝑐ℎ𝑖𝑢𝑠' by Béla Nagy and Brian R. Watters is a comprehensive reference guide to the remarkable seasonal fishes of Africa, bringing together decades of field observations from more than sixty expeditions across Africa, research, aquarium experience, taxonomy and conservation, in a richly illustrated 600-page volume, with many hundreds of full-colour photographs, over 150 habitats including 50 type localities, maps covering all species, phylogenetic diagrams, and detailed accounts of every species.

Available to preorder now (link below) and expected to ship 10th November 2026.

𝗣𝘂𝗯𝗹𝗶𝘀𝗵𝗲𝗿'𝘀 𝗱𝗲𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻:
'Fishes of the Genus 𝑁𝑜𝑡ℎ𝑜𝑏𝑟𝑎𝑛𝑐ℎ𝑖𝑢𝑠' presents a comprehensive account of Africa’s remarkable seasonal fishes, which complete their entire life cycle in ephemeral wetlands that appear and vanish with the rains.
​
Drawing on decades of field exploration, scientific research, and aquarium observations, Béla Nagy and Brian R. Watters explore the ecology, life history, reproduction, diversity, classification, and conservation of these extraordinary fishes. From the seasonal wetlands they inhabit to the remarkable adaptations that allow them to survive months of drought as dormant embryos, the book reveals a unique group of fishes living at the edge of time.
​
The book brings together extensive field observations from across Africa with detailed habitat descriptions, distribution and dispersal patterns, life-history studies, maintenance and breeding techniques, and modern approaches to classification and systematics. The final chapter provides comprehensive species accounts covering identification, taxonomy, habitat, distribution, conservation status, reproduction, and maintenance.

Richly illustrated throughout, the book includes hundreds of full-colour photographs, biotope images, maps, phylogenetic diagrams, historical illustrations, and detailed drawings. It is both a scientific reference and a visual exploration of the extraordinary diversity of 𝑁𝑜𝑡ℎ𝑜𝑏𝑟𝑎𝑛𝑐ℎ𝑖𝑢𝑠.

Written for researchers, conservationists, ichthyologists, killifish enthusiasts, and dedicated aquarists, this book offers an authoritative and accessible synthesis of one of Africa’s most fascinating groups of freshwater fishes.

600 pages ​| over 650 full-colour photos | 102 species accounts | 30 maps covering all species | 14 phylogenies | 7 x 10 in - 17.8 x 25.4 cm

𝗢𝗿𝗱𝗲𝗿𝗶𝗻𝗴 𝗱𝗲𝘁𝗮𝗶𝗹𝘀:
A limited number of softcover and hardcover books printed on premium 115gsm coated paper will be available directly from the authors (while supplies last) for 60 and 80 euros, respectively, plus shipping. Available via the website contact form.

https://t.co/vGqcCpWK77

The book will also be available through online distributors worldwide when launched. Online prices via online distributors will start at approximately 90 EUR / 96 USD for the softcover and 110 EUR / 130 USD for the hardcover, plus shipping.

#AquariumHobby #Fishkeeping #Aquarist #TropicalFish #FishTank #Killifish #Killifishes #Books #AquariumBook #AquariumBooks #AnnualKillifish #SeasonalKillifish #Killifische #Nothobranchius #Nothobranchiidae

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

@EricBaxter_ They have a ressemblance!

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

Oligosarcus bolivianus, a freshwater fish endemic to the Andean portion of the La Plata River basin, inhabiting the upper Bermejo and Pilcomayo river systems. A remarkable representative of the unique mountain fish fauna of northwestern Argentina and southern Bolivia.

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

Nantis indefessus, a freshwater fish endemic to the upper Bermejo and Juramento river basins in northwestern Argentina. A distinctive representative of the native fish fauna of the Andean portion of the La Plata basin.

#Characiformes #CONICET #ArgentineFish #Biodiversity

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

Apistogramma commbrae, male.

#cíclidos #cichlids #dwarfcichlid #pecesargentinos

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

Female Apistogramma commbrae

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

A beautiful male Piabina thomasi (Stevardiidae), endemic to the upper Bermejo and Juramento river basins in Argentina and Bolivia. This small schooling fish inhabits pools and slow-flowing waters of Andean rivers. Listed as Vulnerable (VU) by the IUCN.

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

A female Urkumayu gladysae, an armored catfish endemic to Argentina’s Calchaquí River. Living at ~2,400 m, it is among the highest-altitude Callichthyidae. Adapted to cold Andean waters, it shares its habitat with introduced rainbow trout.

#Corydoradinae #AndeanFish

[Fish in the News @FishInTheNews]

#NewSpeciesAlert - 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑡𝑢𝑖𝑟𝑒𝑎𝑒 and 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑏𝑒𝑟𝑡𝑎𝑒, two new species of annual killifish (Rivulidae), are described from temporary ponds in the Atlantic coastal Laguna de Rocha basin and the middle Cebollatí River basin (both within Laguna dos Patos freshwater ecoregion), Uruguay, respectively.

🔓 https://t.co/C3TFMcGGcc

"Morphological, molecular, and geographic information show that the genus 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 is a more complex clade than previously thought. In this context, we described two new species and discovered the more extreme chromatic polymorphism within the 𝐴𝑢𝑠𝑡𝑟𝑜𝑙𝑒𝑏𝑖𝑎𝑠 genus group, a clade already proposed as having high morphological and chromatic intraspecific variation."

𝗥𝗲𝘀𝗲𝗮𝗿𝗰𝗵 𝗧𝗶𝘁𝗹𝗲
The uniform, the banded, and the polymorphic: an integrative taxonomy in the annual fish 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 (Atheriniformes: Rivulidae)

𝗖𝗶𝘁𝗮𝘁𝗶𝗼𝗻
Duarte A, Loureiro M, Ríos N, Serra W, Bessonart J, García G. The uniform, the banded, and the polymorphic: an integrative taxonomy in the annual fish 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 (Atheriniformes: Rivulidae). Neotropical Ichthyology. 2026;24(3):e260001. DOI: https://t.co/QpMFrSnHKT

𝗔𝗯𝘀𝘁𝗿𝗮𝗰𝘁
Based on an integrative approach (genetic, morphology and biogeography), two new species of 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 are described from Laguna de Rocha and middle Cebollatí River basins respectively (Laguna dos Patos ecoregion).

The new species from Laguna de Rocha is diagnosed by a chromatic character and cytochrome b mutations; the new species from middle Cebollatí is diagnosed by a combination of chromatic and squamation patterns. Both species are allopatrically distributed relative to the other species of the genus and to each other.

This study also indicates that 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑞𝑢𝑖𝑟𝑜𝑔𝑎𝑖 presents high chromatic polymorphism that could be related to drainage rearrangements between the Lower Uruguay and Laguna dos Patos ecoregions.

𝗣𝗵𝗼𝘁𝗼 𝗖𝗿𝗲𝗱𝗶𝘁
Top: A. Holotype of 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑡𝑢𝑖𝑟𝑒𝑎𝑒, ZVC-P 16238, 31.6 mm SL; B. Female paratype of 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑡𝑢𝑖𝑟𝑒𝑎𝑒, ZVC-P 16445. C. Holotype of 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑏𝑒𝑟𝑡𝑎𝑒, ZVC-P 16449, 31.6 mm SL; D. Female paratype, ZVC-P 16443.
Bottom: Pigmentation pattern in 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 males. A. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑙𝑢𝑡𝑒𝑜𝑓𝑙𝑎𝑚𝑚𝑢𝑙𝑎𝑡𝑢𝑠 banded (ZVC-P 16444); B. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑙𝑢𝑡𝑒𝑜𝑓𝑙𝑎𝑚𝑚𝑢𝑙𝑎𝑡𝑢𝑠 uniform (ZVC-P 16444); C. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑎𝑓𝑓. 𝑙𝑢𝑡𝑒𝑜𝑓𝑙𝑎𝑚𝑚𝑢𝑙𝑎𝑡𝑢𝑠 1 (ZVC-P 16445); D. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑞𝑢𝑖𝑟𝑜𝑔𝑎𝑖 (ZVCP 8742); E. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑎𝑓𝑓. 𝑙𝑢𝑡𝑒𝑜𝑓𝑙𝑎𝑚𝑚𝑢𝑙𝑎𝑡𝑢𝑠 2 (ZVCP 14462); F. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑎𝑓𝑓. 𝑞𝑢𝑖𝑟𝑜𝑔𝑎𝑖 (ZVCP 16449). Pigmentation patterns in 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 females. G. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑙𝑢𝑡𝑒𝑜𝑓𝑙𝑎𝑚𝑚𝑢𝑙𝑎𝑡𝑢𝑠 (ZVC-P 4105); H. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑎𝑓𝑓. 𝑙𝑢𝑡𝑒𝑜𝑓𝑙𝑎𝑚𝑚𝑢𝑙𝑎𝑡𝑢𝑠 1 (ZVC-P 15359); I. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑞𝑢𝑖𝑟𝑜𝑔𝑎𝑖 (ZVC-P 9718); J. 𝐴𝑐𝑎𝑛𝑡ℎ𝑜𝑙𝑒𝑏𝑖𝑎𝑠 𝑎𝑓𝑓. 𝑞𝑢𝑖𝑟𝑜𝑔𝑎𝑖 (ZVC-P 13502). Arrow = dark grey vertical bar.

© 2026 the Author(s). Published in the journal Neotropical Ichthyology. An open access article, distributed under the terms of the Creative Commons Attribution 4.0 International (CC-BY-4.0) licence. https://t.co/5IYEkz4Rwi

#NewSpecies #Ichthyology #Taxonomy #Biodiversity #AquariumHobby #Fishkeeping #Aquarist #TropicalFish #FishTank #Killifish #Killifishes #Acantholebias #Atheriniformes #Rivulidae #CloudFish #AnnualKillifish #LagunaDosPatos #ChromaticPolymorphism #CytochromeB #Uruguay #Polymorphism #Neotropical

[Killifish Foundation - Research and Conservation @Killisfundation]

Uncoupled Histories in the Largest Continental Arc of North America: Goodeid Fishes and Their Gyrodactylid Parasites Influenced Differently by the Trans-Mexican Volcanic Belt
García-Arguello et al. 2026. Integrative Zoology
https://t.co/e7ltlr1Qm7

[Killifish Foundation - Research and Conservation @Killisfundation]

When Protecting Wetlands Is Not Enough: Active Conservation for Threatened Annual Killifish
Maltchik L, Godoy RS, Weber V, Stenert C, Bairos Moreira LF. 2026. Animal Conservation 1–3
https://t.co/1FimHchw08

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

@Joseeloma_ @JamesAl0410008 Y de hecho no lo hay, es a criterio de los científicos. Y lo de descendencia fértil simplemente no funciona, en la mayoría de los casos las especies dan descendencia fértil con otras especies cercanas, eso concepto de especie no se sigue más hace mucho

[James Albert 🐟 🇺🇦 @JamesAl0410008]

Yellow and olive baboons do hybridize continuously, yet the species remain distinct. Narrow, decades-stable hybrid zones, discrete genomic clusters, assortative mating, and selection all show that species can persist with ongoing gene flow.

https://t.co/8ABXbbr11H

[James Albert 🐟 🇺🇦 @JamesAl0410008]

Zhang and colleagues found genomic regions of two "ghost lineages" in all modern human populations, representing previously unknown archaic human species. The plot thickens.

https://t.co/bcfbzkMdf6

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

@JamesAl0410008 Are species real units (objectively) of nature? I think they are not either...

[Felipe Alonso🇦🇷⭐️⭐️⭐️ @FelipeAlonsoBio]

🐟 Urkumayu gladysae (Calviño & Alonso, 2010) es una especie de bagre acorazado de la familia Callichthyidae, subfamilia Corydoradinae, endémica del río Calchaquí, en los Valles Calchaquíes de Salta, Argentina.

🚨 Estado de conservación: EN PELIGRO CRÍTICO (UICN)
📸 P. Calviño